Week 16 · Study guide

Final Exam Study Guide · Weeks 1–15 (Objectives 1–8)

Introduction to Biology · BIOL 101 Fall 2026 · Prof. Castellano Fictional sample

Course: Introduction to Biology — General Biology I (BIOL 101) · Silver Oak University (fictional sample) · Prof. Castellano
This is a student-facing review page. Read it, work the fresh practice, re-derive every number, and follow the dated plan. Then run the paired Exam-Prep Tutorial and take the Practice Final for active recall. (This guide points to those two — it does not repeat them.)

Integrity note for students. Every practice item and worked number on this page is a fresh variant — new scenarios and wording — with a vetted, pre-computed answer. None of these are the live final questions. Working them builds the skill the final tests, the honest way.

What the final covers (read this first)


Exam	Final — cumulative, Weeks 1–15, all 8 Objectives
Format	25 items, 100 points. A mix of concept, scenario, and quantitative items: most give you a short situation, a cross, or a figure (described in words) and ask you to name the concept, put the steps in order, or work the number. Expect multiple-choice, several matching items (for process order and structure→function), and a few true/false. There IS arithmetic — the genetics ratios, the mitotic index, 2ⁿ, pH factors, and surface-area-to-volume — all with clean numbers.
Coverage (where the points are)	Obj 1 = 3 items (science of biology) · Obj 2 = 4 (chemistry & macromolecules) · Obj 3 = 3 (cells & transport) · Obj 4 = 4 (energy, respiration & photosynthesis) · Obj 5 = 3 (mitosis & meiosis) · Obj 6 = 3 (genetics & inheritance) · Obj 7 = 3 (DNA & gene expression) · Obj 8 = 2 (regulation, mutation & biotech). The back half — Objectives 5–8 — is 11 of 25, so budget the most time there (the midterm already covered Obj 1–4).
Weight	The final is 25% of your course grade — the single biggest assessment in the course.
When it opens / where	Opens in the Week 16 module (the final-review-and-exam week); the window opens Mon Dec 14 and the exam is due six days later. This guide and the exam-prep tutorial post before it so you can prepare. There is no weekly quiz, assignment, lab, or discussion in Week 16 — the final replaces them. AI is not permitted on the Final.
What to bring	Yourself, rested, scratch paper for the calculations, and the one-page concept sheet you build from this guide. The exam is name-it / order-it / work-it: read a scenario or cross, identify the concept or fill the square, choose the best answer.

How to use this guide. Each objective below has the same four parts: (A) the key ideas in plain language, (B) the definitions / processes / worked numbers, (C) the predictable mistakes and their cures, and (D) where to review in the module. After all eight objectives come fresh worked examples + self-check questions (with answers), a dated study plan sized to finals week, and how it's graded + test strategy.

Objective 1 — The Science of Biology (Week 1) · 3 items

(A) Key ideas, plain language

Biology is the scientific study of life. Before any cell or gene, two questions: what is alive (use the whole checklist, not one trait) and how do we know what's true (a controlled experiment beats "it sounds right"). Evolution by natural selection is the thread tying all of biology together.

(B) Definitions, processes, figures

Characteristics of life (the whole checklist): made of cells, uses energy, grows/develops, reproduces (passes on DNA), responds to the environment, maintains homeostasis, and evolves as a population. A flame or a growing crystal matches a couple of these but isn't alive.
Levels of organization: atom → molecule → cell → tissue → organ → organism → population → ecosystem. Emergent properties appear at higher levels (one heart cell twitches; the organized heart pumps).
Controlled experiment: independent variable = what you deliberately change; dependent variable = what you measure; controlled variables = kept the same; control group = the no-treatment baseline. "I change the Independent; the result Depends on it."
Hypothesis vs. theory: a hypothesis is one testable, falsifiable prediction; a theory is a broad, well-supported explanation (the cell theory, the theory of evolution) — not "just a guess."
Evolution by natural selection: heritable traits that aid survival become more common in a population over generations (e.g., antibiotic resistance spreading) — biology's unifying theme.

(C) Predictable mistakes → cures

❌ "It grows and moves, so it's alive." → ✅ Life is the whole checklist — no cells/DNA/homeostasis → not alive.
❌ Swaps the independent and dependent variables. → ✅ You change the independent; you measure the dependent.
❌ Calls the treatment group the "control." → ✅ The control is the no-treatment baseline.
❌ "A theory is just a hunch." → ✅ In science a theory is broad and well-supported; a hypothesis is the small, testable prediction.
❌ Treats evolution as optional background. → ✅ It's the unifying theme that explains life's unity and diversity.

(D) Review in the module

Week 1 → Lecture Outline, Slides (Deck 1), Readings, Lecture Tutorial 1, Lab 1 ("Drops on a Penny").

Objective 2 — The Chemistry of Life & Macromolecules (Weeks 2–3) · 4 items

(A) Key ideas, plain language

Life runs on chemistry. Atoms bond in three ways; water's odd properties make life possible; pH measures acidity on a 10×-per-unit scale; and four macromolecules build everything — with structure determining function.

(B) Definitions, processes, worked numbers

Bonds: covalent = electrons shared; ionic = electrons transferred (→ charged ions attract, as in NaCl); hydrogen bond = a weak attraction between molecules.
Water's properties (from hydrogen bonding): cohesion (water-to-water → surface tension), adhesion (water-to-other), high specific heat, ice floats, universal solvent.
pH (quantitative): lower = more acidic; each unit = a 10× change in [H⁺]. So pH 4 is 10³ = 1000× more acidic than pH 7; pH 2 is 10² = 100× more acidic than pH 4. A buffer resists (minimizes) pH change — it doesn't prevent all change.
Macromolecules → monomers (structure→function): carbohydrates ← monosaccharides (glucose; energy + structure, e.g., starch vs. cellulose); proteins ← amino acids (shape from sequence → function; one wrong amino acid → sickle cell); nucleic acids ← nucleotides (store info). Lipids are the exception — built from glycerol + fatty acids, not a repeating monomer (energy storage + membranes).
Build/break: dehydration synthesis joins monomers (removes water); hydrolysis breaks polymers (adds water).

(C) Predictable mistakes → cures

❌ "Ionic bonds share electrons." → ✅ Ionic = transferred; covalent = shared.
❌ Confuses cohesion and adhesion. → ✅ Cohesion = water-to-water; adhesion = water-to-other.
❌ "Higher pH = more acidic," or reports a pH difference as the number of units. → ✅ Lower pH = more acidic; each unit is a 10× factor (pH 4 vs 7 = 1000×).
❌ Calls lipids polymers. → ✅ Lipids are built from glycerol + fatty acids, not a repeating monomer.
❌ "All carbs are sugar." → ✅ Cellulose is a structural carbohydrate (plant cell walls).

(D) Review in the module

Week 2 → Lecture Outline (atoms, bonds, water, pH), Deck 2, Lab 2 (red-cabbage pH). Week 3 → Lecture Outline (the four macromolecules), Deck 3, Lab 3 (food macromolecule tests).

Objective 3 — Cell Structure, Membranes & Transport (Week 4) · 3 items

(A) Key ideas, plain language

The cell is life's smallest unit. Know the organelles by job (structure → function), how the membrane controls traffic, and why cells stay microscopic (surface-area-to-volume).

(B) Definitions, processes, worked numbers

Prokaryote vs. eukaryote: prokaryotes have no nucleus; eukaryotes enclose DNA in a membrane-bound nucleus (the deepest divide; eukaryotes are also generally larger).
Organelles → function: nucleus (DNA, control), ribosome (builds proteins), mitochondrion (ATP — respiration), chloroplast (photosynthesis), rough/smooth ER, Golgi (packages/ships), lysosome (digests), vacuole, cell membrane, cell wall (plants). (Plant cells have both mitochondria AND chloroplasts.)
Membrane: a phospholipid bilayer (fluid mosaic) — selectively permeable.
Transport: passive (no energy) — diffusion, osmosis (water movement), facilitated diffusion; active transport moves things against the gradient and costs ATP.
Osmosis direction: hypotonic surrounding → water moves in, cell swells (cell wall stops bursting); hypertonic → water moves out, cell shrivels; isotonic → no net movement.
Surface-area-to-volume (quantitative): for a cube, SA = 6s², V = s³, so SA:V = 6/s. Side 1 → 6:1, side 2 → 3:1, side 3 → 2:1, side 4 → 1.5:1. As a cell grows, SA:V drops → less surface to service each unit of volume → why cells stay small (and use folds/microvilli).

(C) Predictable mistakes → cures

❌ "Plant cells don't have mitochondria." → ✅ They have both mitochondria and chloroplasts.
❌ "Osmosis moves the solute." → ✅ Osmosis = water movement; the solute stays put.
❌ Reverses hypertonic / hypotonic. → ✅ Hypotonic outside → water in (swell); hypertonic → water out (shrivel).
❌ "Bigger cells are better." → ✅ Bigger = lower SA:V → harder to supply; cells stay small.
❌ Thinks active transport is free. → ✅ Moving against a gradient costs ATP.

(D) Review in the module

Week 4 → Lecture Outline (organelles, membrane, transport, SA:V), Deck 4, Lab 4 (SA:V cubes + diffusion).

Objective 4 — Energy, Enzymes, Respiration & Photosynthesis (Weeks 5–7) · 4 items

(A) Key ideas, plain language

Cells capture and spend energy. ATP is the currency; enzymes speed reactions by lowering activation energy; respiration releases energy from glucose; photosynthesis stores energy in glucose. Both are ordered overviews — know the stages, locations, and where O₂ and ATP come from.

(B) Definitions, processes, figures

ATP = the cell's immediate energy currency (ATP ↔ ADP cycle).
Enzymes are reusable catalysts that lower activation energy and are specific (lock-and-key/induced fit). Past the optimum, heat denatures them — the shape unfolds and the active site no longer fits (rate crashes to ~0).
Cellular respiration (in order): big idea glucose + O₂ → CO₂ + H₂O + ATP.
Glycolysis — cytoplasm; glucose → 2 pyruvate; net 2 ATP (anaerobic start).
Krebs (citric-acid) cycle — mitochondrial matrix; releases CO₂; makes NADH/FADH₂.
Electron transport chain — inner mitochondrial membrane; O₂ is the final electron acceptor; makes the most ATP.
No O₂ → fermentation (lactic acid / alcohol). Plants respire too.
Photosynthesis (in order): big idea CO₂ + H₂O + light → glucose + O₂.
Light-dependent reactions — thylakoid membranes; split water → release O₂; make ATP + NADPH.
Calvin cycle (light-independent) — stroma; fix CO₂ into sugar using ATP + NADPH (it needs the light reactions' products).
Roughly the reverse of respiration.

(C) Predictable mistakes → cures

❌ "Enzymes are used up." → ✅ They're reusable catalysts.
❌ "More heat is always better for enzymes." → ✅ Past the optimum, heat denatures them.
❌ Puts the stages out of order / "glycolysis makes the most ATP." → ✅ Order: glycolysis → Krebs → ETC; the ETC makes the most ATP.
❌ "O₂ comes from CO₂ in photosynthesis." → ✅ O₂ comes from splitting water.
❌ "Plants don't do respiration." → ✅ Plants respire constantly (and photosynthesize in light).

(D) Review in the module

Week 5 → Lecture Outline (energy, ATP, enzymes), Deck 5, Lab 5 (catalase). Week 6 → Lecture Outline (respiration stages), Deck 6, Lab 6 (yeast fermentation). Week 7 → Lecture Outline (photosynthesis stages), Deck 7, Lab 7 (floating leaf disks).

Objective 5 — The Cell Cycle, Mitosis & Meiosis (Weeks 9–10) · 3 items (back half — heavier)

(A) Key ideas, plain language

Cells divide. Mitosis makes two identical diploid cells (growth/repair); meiosis makes four unique haploid gametes (reproduction + variation). Know the phase order, the mitotic index calculation, and the mitosis-vs-meiosis contrast.

(B) Definitions, processes, worked numbers

Cell cycle: interphase (G1 → S [DNA replicates] → G2) then M phase. Most of a cell's life is interphase.
Mitosis (PMAT, in order): Prophase (chromosomes condense; nuclear envelope breaks down) → Metaphase (line up single-file in the middle) → Anaphase (sister chromatids pulled apart to the poles) → Telophase (two new nuclei form) → cytokinesis (cytoplasm splits). Result: two identical diploid cells.
Mitotic index (quantitative): = (cells in mitosis ÷ total cells) × 100. Example: of 100 cells — 80 interphase, 9 prophase, 4 metaphase, 3 anaphase, 4 telophase → in mitosis = 9+4+3+4 = 20 → MI = 20%. (With a 24-h cycle, interphase ≈ 0.80 × 24 = 19.2 h.)
Meiosis: two divisions → four genetically unique haploid gametes. Crossing over (prophase I) and independent assortment create variation.
2ⁿ (quantitative): from independent assortment alone, gamete variety = 2ⁿ (n = haploid number). n=2 → 4; n=3 → 8; n=4 → 16; human n=23 → 2²³ = 8,388,608.
Mitosis vs. meiosis: 1 division / 2 identical diploid vs. 2 divisions / 4 unique haploid; crossing over is meiosis only.

(C) Predictable mistakes → cures

❌ Mis-orders the phases. → ✅ Use PMAT.
❌ Confuses chromosome and chromatid. → ✅ Sister chromatids are the two copies joined at the centromere; they separate in anaphase.
❌ "Mitosis makes gametes / halves the chromosome number." → ✅ That's meiosis; mitosis makes identical diploid cells.
❌ "Crossing over happens in mitosis." → ✅ Meiosis only (prophase I).
❌ "Mitosis = the whole cell cycle." → ✅ Mitosis is just the division part; interphase is most of the cycle.

(D) Review in the module

Week 9 → Lecture Outline (cell cycle, PMAT, mitotic index), Deck 9, Lab 9 (onion-root-tip). Week 10 → Lecture Outline (meiosis, crossing over, 2ⁿ, mitosis vs meiosis), Deck 10, Lab 10 (meiosis model).

Objective 6 — Inheritance: Mendelian Genetics & Patterns (Weeks 11–12) · 3 items (the quantitative pocket)

(A) Key ideas, plain language

Given the parents, predict the offspring. Lock the vocabulary, fill a Punnett square, multiply with the product rule, and handle the patterns that bend Mendel's rules.

(B) Definitions, processes, worked numbers

Vocabulary (lock these): gene/allele, dominant/recessive, genotype/phenotype, homozygous/heterozygous. Almost every genetics error is a word error.
Law of segregation: each parent passes one allele per gene.
Monohybrid Tt × Tt (quantitative): genotype 1 TT : 2 Tt : 1 tt; phenotype 3 tall : 1 short (3:1); P(recessive) = 1/4, P(dominant) = 3/4. Tt × tt → 1:1. TT × tt → all Tt (all dominant).
Product rule (multiply for "and"): P(recessive child) = 1/2 × 1/2 = 1/4.
Dihybrid TtYy × TtYy (quantitative): ratio 9 : 3 : 3 : 1; P(both recessive, ttyy) = 1/4 × 1/4 = 1/16; P(both dominant) = 3/4 × 3/4 = 9/16.
Test cross: cross the unknown with tt — any short offspring means the parent was Tt (hid a t); all tall means TT.
Patterns that bend Mendel:
Incomplete dominance: RW → pink (a blend); RW × RW → 1 red : 2 pink : 1 white, so P(pink) = 1/2.
Codominance: AB blood — both alleles show.
Multiple alleles / ABO: Iᴬi (A) × Iᴮi (B) → AB, A, B, O each 1/4 → P(type O) = 1/4.
X-linked recessive (colorblindness): carrier mom (XᴬXᵃ) × normal dad (XᴬY) → sons 1/2 affected, daughters 0 affected (1/2 carriers) → far more males affected.

(C) Predictable mistakes → cures

❌ "Dominant = stronger/more common." → ✅ Dominant just shows when present.
❌ Reports the 1:2:1 genotype ratio as the phenotype. → ✅ Phenotype is 3:1.
❌ "A 3:1 ratio is guaranteed in a family of four." → ✅ It's a probability (like coin flips) — small families vary.
❌ Botches the dihybrid (e.g., "9:3:1"). → ✅ Four classes: 9:3:3:1 (sum 16).
❌ "Blood type O is dominant." → ✅ i (O) is recessive.

(D) Review in the module

Week 11 → Lecture Outline (segregation, Punnett, product rule, dihybrid), Deck 11, Lab 11 (coin-toss genetics). Week 12 → Lecture Outline (incomplete/co-dominance, ABO, X-linkage, pedigrees), Deck 12, Lab 12 (pedigree/blood-type).

Objective 7 — Molecular Biology: DNA, Replication & Gene Expression (Weeks 13–14) · 3 items

(A) Key ideas, plain language

DNA is the instruction manual. Know its structure and base pairing, how it copies itself, and how the central dogma reads it into proteins.

(B) Definitions, processes, worked numbers

DNA structure: a double helix of two antiparallel strands; bases pair A–T and G–C via hydrogen bonds. Chargaff's rule: %A = %T, %G = %C (so 30% A → 30% T, and G = C = (100−60)/2 = 20% each). (History, factual: Watson, Crick, Franklin.)
Semiconservative replication: the helix unzips and each old strand templates a new one → each daughter helix is one old + one new strand.
Replication machinery: helicase unzips → DNA polymerase adds complementary bases → ligase seals.
Central dogma: DNA → RNA → protein.
Transcription (in the nucleus): DNA template → mRNA; RNA uses U instead of T. A template base A → mRNA U.
Genetic code: codons = 3 bases; AUG = start (Met); UAA / UAG / UGA = stop.
Translation (at the ribosome in the cytoplasm): tRNA brings amino acids matching each codon. Worked example: mRNA 5′–AUG GCU UAU UGA–3′ → Met – Ala – Tyr (then stop; the stop codon is not an amino acid).

(C) Predictable mistakes → cures

❌ Wrong base pairs (e.g., A–G). → ✅ A–T, G–C only.
❌ "Replication is conservative." → ✅ It's semiconservative (half old, half new).
❌ "The two strands are identical." → ✅ They're complementary.
❌ "RNA has thymine." → ✅ RNA uses uracil (U).
❌ "Translation happens in the nucleus." → ✅ Transcription = nucleus; translation = cytoplasm.

(D) Review in the module

Week 13 → Lecture Outline (double helix, base pairing, semiconservative replication, Chargaff), Deck 13, Lab 13 (strawberry DNA). Week 14 → Lecture Outline (central dogma, transcription, the code, translation), Deck 14, Lab 14 (transcribe & translate).

Objective 8 — Gene Regulation, Mutation & Biotechnology (Week 15) · 2 items

(A) Key ideas, plain language

Cells control which genes are on; DNA can change (mutate); and biotechnology lets us copy, sort, and edit DNA.

(B) Definitions, processes, figures

Gene regulation: every cell carries the same genes, but each type switches on only the ones it needs (the lac operon is the classic on/off example) — how one genome builds many cell types.
Mutations: point mutations (silent / missense / nonsense) and frameshift (insertion/deletion). Caused by mutagens; effects are harmful, neutral, or beneficial — the raw material for evolution. Not all mutations are bad.
Biotechnology tools:
PCR — copies (amplifies) DNA, making millions of copies.
Gel electrophoresis — sorts DNA by size; smaller fragments travel farther from the wells. To match a crime-scene sample to a suspect, the band patterns must line up.
Recombinant DNA / plasmids — move genes between organisms.
CRISPR — precise gene editing.

(C) Predictable mistakes → cures

❌ "All mutations are harmful." → ✅ Many are neutral or beneficial (raw material for evolution).
❌ "You use all your genes all the time." → ✅ Gene regulation turns the right genes on/off.
❌ "Bigger DNA fragments travel farther in a gel." → ✅ Smaller fragments travel farther.
❌ Confuses PCR and gel electrophoresis. → ✅ PCR copies; the gel sorts.

(D) Review in the module

Week 15 → Lecture Outline (gene regulation, mutation types, PCR/gel/recombinant DNA/CRISPR), Deck 15, Lab 15 (virtual gel electrophoresis / DNA fingerprinting).

Representative practice (all fresh — vetted, pre-computed answers)

None of these are live final items. New scenarios, new wording. Each answer is vetted; the quantitative ones are pre-computed and were independently re-verified. Cover the answers, work each one (re-derive the numbers yourself), then check. Practice is weighted toward the heavier back half (Objectives 5–8).

Objective 1 practice

Worked example — definition, experiment, hypothesis vs. theory.
A student wonders whether playing music helps bean plants grow. He grows 20 identical seedlings: 10 with music, 10 in silence, same light, water, and soil, and measures height after three weeks.
- (a) Name the independent, dependent, and controlled variables and the control group. (b) Is "playing music helps plants grow" a hypothesis or a theory? (c) Is "my plant grows because it enjoys the music" scientific?
Answer. (a) IV = music vs. silence; DV = height after 3 weeks; controlled = light/water/soil; control group = the silent seedlings. (b) A hypothesis (single testable prediction). (c) No — "it enjoys the music" isn't falsifiable. Why: you change the IV, measure the DV; a hypothesis is testable; unfalsifiable claims aren't science.

Self-check (Obj 1).
1. True/false: a candle flame is alive because it grows and consumes fuel. → False (no cells/DNA/homeostasis).
2. Pumping that appears only in the whole organized heart is an example of? → An emergent property.
3. Bacteria becoming antibiotic-resistant over generations is which unifying process? → Evolution by natural selection.
4. The no-treatment baseline group is the? → Control group.

Objective 2 practice

Worked example — bonds, pH (quantitative), macromolecules.
A chemistry-of-life quiz asks about table salt (NaCl), a sample of stomach acid at pH 2, and a plate of pasta (starch).
- (a) The bond in NaCl, formed by transferring an electron, is? (b) How many times more acidic is pH 2 than pH 4? (c) Starch is which macromolecule, built from which monomer?
Answer. (a) An ionic bond. (b) 100× (10² — two pH units). (c) A carbohydrate, built from monosaccharides (glucose). Why: ionic = transferred; each pH unit = 10×, so 2 units = 100×; starch is a polysaccharide of glucose. (Pre-verified.)

Self-check (Obj 2).
1. Water beading on a waxed car (water-to-water attraction) shows? → Cohesion.
2. Which macromolecule is NOT a polymer of a repeating monomer? → Lipids (glycerol + fatty acids).
3. How much more acidic is pH 3 than pH 6? → 1000× (10³).
4. Breaking a polymer by adding water is? → Hydrolysis.

Objective 3 practice

Worked example — organelle, osmosis, SA:V (quantitative).
A biology class compares a human liver cell, a red blood cell in pure water, and four cube-shaped model cells of side 1, 2, 3, and 4.
- (a) Which organelle makes most of the liver cell's ATP? (b) What happens to the red blood cell in pure (hypotonic) water? (c) Which cube has the highest SA:V?
Answer. (a) The mitochondrion. (b) Water moves in and it swells (and, lacking a wall, can burst). (c) The side-1 cube (SA:V = 6/1 = 6:1). Why: mitochondria make ATP; hypotonic → water in; SA:V = 6/s is highest for the smallest cube. (Pre-verified.)

Self-check (Obj 3).
1. Osmosis is the movement of what? → Water (not solute).
2. Moving ions against their gradient requires? → ATP (active transport).
3. As a cell grows larger, its surface-area-to-volume ratio? → Decreases.
4. The deepest difference between a bacterium and a human cell is the human cell's? → Membrane-bound nucleus.

Objective 4 practice — back half; work all of these

Worked example 1 — enzymes + respiration order.
A student tests catalase activity by adding hydrogen peroxide to potato cubes at 5 °C, 37 °C, and after boiling. Separately, she lists the stages of respiration.
- (a) Why does the boiled potato produce no bubbles? (b) Put glycolysis, the Krebs cycle, and the electron transport chain in order, and say which makes the most ATP.
Answer. (a) Boiling denatured the enzyme — its active site no longer fits, so the rate is ~0. (b) Glycolysis (cytoplasm) → Krebs cycle (matrix) → electron transport chain (inner membrane); the ETC makes the most ATP. Why: heat denatures enzymes; the order and the ETC's ATP yield are the gradable facts.

Worked example 2 — photosynthesis.
A pond plant bubbles oxygen in sunlight.
- (a) Where does that O₂ come from? (b) In which structure does the Calvin cycle fix CO₂, and does it need light directly?
Answer. (a) From splitting water in the light-dependent reactions (not from CO₂). (b) The stroma; the Calvin cycle doesn't use light directly but needs the ATP + NADPH the light reactions make. Why: O₂ comes from water; the Calvin cycle runs on the light reactions' products.

Self-check (Obj 4).
1. Enzymes speed reactions by lowering the? → Activation energy.
2. True/false: plants do not perform cellular respiration. → False (they respire constantly).
3. The cell's immediate energy currency is? → ATP.
4. The final electron acceptor in the electron transport chain is? → Oxygen (O₂).

Objective 5 practice — back half; work all of these

Worked example — mitosis order + mitotic index (quantitative) + mitosis vs meiosis.
On an onion-root-tip slide of 100 cells, a student counts 82 interphase, 8 prophase, 4 metaphase, 2 anaphase, 4 telophase.
- (a) Put the mitosis phases in order. (b) Compute the mitotic index. (c) How does meiosis differ from mitosis in daughter cells?
Answer. (a) Prophase → Metaphase → Anaphase → Telophase (PMAT). (b) In mitosis = 8+4+2+4 = 18; MI = 18/100 × 100 = 18%. (c) Meiosis makes four genetically unique haploid gametes; mitosis makes two identical diploid cells. Why: PMAT order; MI = (in mitosis ÷ total) × 100; meiosis halves ploidy and adds variation. (Pre-verified.)

Self-check (Obj 5).
1. An organism with 4 chromosome pairs makes how many gametes by independent assortment? → 2⁴ = 16.
2. Most cells in a root tip are in which phase? → Interphase.
3. Crossing over occurs in which division? → Meiosis (prophase I).
4. Sister chromatids separate in which mitosis phase? → Anaphase.

Objective 6 practice — the quantitative pocket; work all of these

Worked example 1 — monohybrid + product rule.
In pea plants, purple flowers (P) are dominant to white (p). Cross two heterozygotes (Pp × Pp).
- (a) Genotype ratio? (b) Phenotype ratio? (c) P(white offspring), two ways?
Answer. (a) 1 PP : 2 Pp : 1 pp. (b) 3 purple : 1 white. (c) By the square, 1 of 4 boxes is pp → 1/4; by the product rule, 1/2 × 1/2 = 1/4. Why: any P is purple → 3:1; both methods agree at 1/4. (Pre-verified.)

Worked example 2 — dihybrid (quantitative).
Cross TtYy × TtYy (tall/yellow dominant), genes independent.
- (a) Phenotype ratio? (b) P(both recessive, ttyy)? (c) P(both dominant)?
Answer. (a) 9 : 3 : 3 : 1. (b) 1/4 × 1/4 = 1/16. (c) 3/4 × 3/4 = 9/16. Why: the dihybrid is two 3:1 crosses multiplied. (Pre-verified.)

Worked example 3 — patterns of inheritance.
A type-A father (Iᴬi) and a type-B mother (Iᴮi); separately, two pink snapdragons (RW × RW) are crossed.
- (a) P(a type-O child)? (b) P(a pink offspring)?
Answer. (a) 1/4 (offspring are AB, A, B, O each 1/4). (b) 1/2 (RW × RW → 1 red : 2 pink : 1 white). Why: each parent hides a recessive i; incomplete dominance gives a 1:2:1 phenotype. (Pre-verified.)

Self-check (Obj 6).
1. The genotype ratio from Tt × Tt is 1:2:1; the phenotype ratio is? → 3:1.
2. Cross Tt × tt — fraction recessive? → 1/2.
3. A carrier mom (XᴬXᵃ) and normal dad (XᴬY): chance a son is colorblind? → 1/2.
4. True/false: blood type O (ii) is dominant. → False (recessive).

Objective 7 practice — back half

Worked example — base pairing, replication, central dogma.
A DNA sample is 30% adenine; separately, an mRNA reads 5′–AUG GCU UAU UGA–3′.
- (a) What % is thymine, and what % are G and C each (Chargaff)? (b) What does "semiconservative" mean? (c) Translate the mRNA.
Answer. (a) T = 30%; G = C = (100 − 60)/2 = 20% each. (b) Each new helix has one old strand + one new strand. (c) Met – Ala – Tyr (then UGA stops). Why: %A = %T and %G = %C; semiconservative = half old/half new; AUG-GCU-UAU = Met-Ala-Tyr. (Pre-verified.)

Self-check (Obj 7).
1. In DNA, adenine pairs with? → Thymine (T).
2. True/false: RNA contains thymine. → False (uracil).
3. Translation occurs at the ribosome in the? → Cytoplasm.
4. The start codon is? → AUG.

Objective 8 practice

Worked example — regulation, mutation, biotech.
A forensic lab amplifies a trace DNA sample, then runs it on a gel beside two suspects.
- (a) Which tool copies the DNA, and which sorts it? (b) Do smaller or larger fragments travel farther? (c) True/false: all mutations are harmful.
Answer. (a) PCR copies; gel electrophoresis sorts. (b) Smaller fragments travel farther. (c) False — mutations can be harmful, neutral, or beneficial. Why: PCR amplifies, the gel size-sorts (smaller = farther); mutations vary in effect.

Self-check (Obj 8).
1. Cells use only some of their genes because of? → Gene regulation (e.g., the lac operon).
2. The tool that makes millions of copies of DNA is? → PCR.
3. In a gel, the smaller fragments end up? → Farther from the wells.
4. True/false: every mutation lowers an organism's fitness. → False.

Study plan — a dated countdown (finals week, sized to 2 sessions/week)

Built for the Week 16 final. Adjust the exact dates to your section's posted exam day; the rhythm is what matters. The final is cumulative and the back half (Obj 5–8) is the heaviest — once your foundations are warm, spend the most time there, and re-work every calculation by hand. Do a little every day rather than one long cram.

When	Do this (≈60–90 min)
~7 days out (end of Week 15)	Read this guide's Objectives 1–2 (science of biology; chemistry & macromolecules). Work the Obj 1 & 2 practice, including the pH factors. Build your one-page concept sheet (the characteristics of life, the variable types, the bond types, the pH 10×-rule, the four macromolecules + monomers).
~6 days out	Read Objective 3 (organelles, transport, SA:V) and Objective 4 (enzymes, respiration, photosynthesis). Work both practice sets; re-derive the SA:V ratios and put the respiration/photosynthesis stages in order from memory.
~5 days out	Read Objective 5 (the cell cycle, PMAT, the mitotic index, 2ⁿ, mitosis vs. meiosis). Work all its examples; re-compute a mitotic index and a 2ⁿ value yourself.
~4 days out	Read Objective 6 carefully — the genetics pocket (monohybrid 3:1, dihybrid 9:3:3:1 / 1/16, the product rule, ABO 1/4, incomplete dominance 1/2, X-linkage). Fill every Punnett square by hand; re-derive each fraction.
~3 days out	Read Objective 7 (base pairing, semiconservative replication, the central dogma, transcribe/translate a codon) and Objective 8 (gene regulation, mutation types, PCR vs. gel). Work both practice sets. Then run the paired Exam-Prep Tutorial (`N-exam-prep-tutorial-week-16`) in an approved chatbot — it diagnoses your weak spots across all 8 objectives and drills them.
~2 days out	Take the Practice Final (`O-practice-final-week-16`, the paired practice exam in this module) under timed, closed-note conditions (it allows multiple attempts — use the first as a real test). Score it; list every missed idea by objective.
~1 day out	Re-teach only the topics you missed on the practice final (use this guide's mistake-cures and the relevant Lecture Tutorial). Re-do those specific self-checks and re-work any missed calculation, with extra attention to Obj 5–8. Sleep.
Exam day	Skim your one-page concept sheet. Arrive early with scratch paper. Read each item twice; for every scenario, name the concept (or set up the cross/calculation) in your own words before looking at the options.

Two paired tools — use both (don't skip):
- Exam-Prep Tutorial (N-exam-prep-tutorial-week-16) — a copy/paste chatbot tutor that diagnoses, re-teaches, and drills you across all 8 objectives, ending with a readiness summary. Best for active recall and shoring up weak spots.
- Practice Final (O-practice-final-week-16, the paired practice exam in the Week 16 module) — a full, fresh run that mirrors the real format and the 25-item emphasis. Best for pacing and a final readiness check.

(This guide points to both on purpose — it doesn't duplicate them.)

How the final is graded + test-taking strategy

How it's graded.
- 100 points across 25 items (4 points each), a mix of concept, scenario, and quantitative items. The matching items award partial credit per correctly paired row; every numeric answer has one clean, pre-verified value.
- The final is 25% of your course grade — the largest single assessment. It replaces Week 16's quiz, assignment, and lab (there is also no discussion that week).
- Coverage matches this guide: Obj 1 = 3 · Obj 2 = 4 · Obj 3 = 3 · Obj 4 = 4 · Obj 5 = 3 · Obj 6 = 3 · Obj 7 = 3 · Obj 8 = 2. The back half (Obj 5–8) is 11 of 25 — practice it until the moves are automatic. AI is not permitted on the Final.

Honest test-taking strategies for this material.
1. Name the concept (or set up the cross) before you read the options. For a scenario or genetics item, say the term or draw the Punnett square first, then find the matching option — it blocks tempting distractors.
2. Work every calculation on scratch paper. pH = count units, then 10^(units). SA:V = 6/s. Mitotic index = (in mitosis ÷ total) × 100. Gametes = 2ⁿ. Don't do these in your head.
3. For genetics, write the genotypes first. Then fill every box; read the genotype ratio (1:2:1) separately from the phenotype ratio (3:1). Use the product rule for "and."
4. For process-order items, recite the sequence: respiration glycolysis → Krebs → ETC; photosynthesis light reactions → Calvin cycle; mitosis PMAT; central dogma DNA → RNA → protein.
5. Keep structure→function straight with your one-page organelle list (mitochondrion = ATP; ribosome = protein; nucleus = DNA; chloroplast = photosynthesis).
6. Watch the directional rules: osmosis (hypotonic → water in); the gel (smaller → farther); SA:V (bigger cell → lower); pH (lower → more acidic).
7. Catch the planted myth that should be marked false: "all mutations are harmful," "plants don't respire," "RNA has thymine," "blood type O is dominant," "a flame is alive."
8. For the central dogma, remember U-not-T and that the stop codon is not an amino acid.
9. Don't confuse the look-alikes: ionic vs. covalent; cohesion vs. adhesion; mitosis vs. meiosis; PCR vs. gel; genotype vs. phenotype; transcription (nucleus) vs. translation (cytoplasm).
10. Do the easy items first, flag the hard ones, and budget your time — 25 items in the period is a couple of minutes each. Read each item twice and answer the question actually asked.

Canvas placement block

canvas_object   = Page
title           = "Final Exam Study Guide — Weeks 1–15 (Objectives 1–8)"
module          = "Week 16 — Final Review & Exam"
grading_type    = not_graded
available_from  = 2026-12-07      # posts before the Week 16 final exam window opens
published       = true
provenance      = "~ Prof. Castellano's edition · Fall 2026 · built with thecoursemaker.com"

Term-update note: each term's $39 update regenerates fresh practice variants from this same scope — the live final is never reproduced here.

The per-term $39 update (fresh assessment variants, re-paced to your next calendar) referenced above is on the roadmap — coming soon. Today's download is yours to keep, but it doesn't refresh itself.

~ Prof. Castellano's edition · Fall 2026 · built with thecoursemaker.com