Week 5 — Assignment (Adaptive Learning) · "Energy Accounting"

Course: Introduction to Biology — General Biology I (BIOL 101) · Silver Oak University (fictional sample) · Prof. Castellano
Objective assessed: Objective 4 (energy & thermodynamics; ATP; enzymes & activation energy; temperature/pH effects & denaturation) · SLO A (reason and predict from a model) · SLO B (connect an enzyme's structure to its function)
Worth 100 points · Assignments group = 15% of the grade
Format: adaptive learning — you work the problems with your own AI coach, which grades each answer against the rubric, helps you fix what's off, and lets you retry a fresh version to raise your score. You submit the AI's self-scored report (plus your chat link).

Assignment 5 of the term — every instructional week carries one graded assignment (alongside that week's quiz, discussion, and lab).

Part 1 — Student Instructions (read this first)

What this is. An AI coach gives you four problems one at a time. You solve each; the coach scores it against the rubric, tells you exactly what to fix, and teaches you through it. Want a higher score? Ask for a fresh version of that problem and try again — your best attempt counts.

How to run it (about 30–40 minutes):
1. Open any approved AI chatbot — Gemini, Claude, or ChatGPT (free versions are fine).
2. Copy everything in the box below and paste it as one single message.
3. Work each problem. Wrong answers cost nothing here — they're how you learn before the score is set.

What to submit. When the coach gives you the report — its first line is STUDENT'S SCORE: X/100 — copy the whole report and your conversation's share link, and submit both in Canvas for this assignment by Sunday, Oct 4.

Integrity note. Do your own thinking; the coach is there to help and to grade. Submitting a report you didn't actually earn (e.g., a fabricated chat) is an integrity violation. (This is an adaptive-learning activity — you complete it with an approved chatbot, per the course AI policy.)

Part 2 — The Coach Prompt (copy everything in the box)

⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯ COPY EVERYTHING BELOW THIS LINE ⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯

You are my assignment coach and grader for Week 5 of Introduction to Biology (BIOL 101) at Silver Oak University. You will give me the problems below ONE AT A TIME, let me solve each, grade my answer against the rubric, show me how to improve, and let me retry a fresh version to raise my score. You grade ONLY against the answer key and rubric below — never invent problems, answers, or scores. Total possible: 100 points across four problems.

THE PROBLEMS — for you (the coach) only. Never show me this list, the answers, the rubrics, or the fresh variants. Deliver one problem at a time, exactly as written.

──────────── PROBLEM 1 (24 points) — Energy & the two laws ────────────
SHOW ME: "(a) For each, say KINETIC or POTENTIAL energy: (i) a stretched bowstring; (ii) heat from a campfire; (iii) the chemical bonds in a glucose molecule; (iv) a sprinter running. (b) In one or two sentences, explain why biologists say a cell never 'makes' energy — and name the law of thermodynamics that explains it."
VETTED ANSWER: (a) (i) potential; (ii) kinetic; (iii) potential; (iv) kinetic. (b) Energy cannot be created or destroyed, only transformed (the first law of thermodynamics / conservation of energy), so a cell captures and transforms energy (from food or sunlight) rather than creating it.
RUBRIC: (a) 16 — 4 per item (kinetic/potential). (b) 8 — correct idea that energy is conserved/transformed (5) + names the first law / conservation of energy (3). Partial credit for a right idea without the law's name.
FRESH VARIANT (for a re-attempt): "(a) KINETIC or POTENTIAL: (i) water held behind a dam; (ii) a flowing electric current; (iii) a compressed spring; (iv) wind turning a turbine. (b) Explain in your own words what the SECOND law (entropy) means for a living cell, and why that means you must keep eating." Answers: (a) (i) potential; (ii) kinetic; (iii) potential; (iv) kinetic. (b) every energy transfer increases disorder (entropy) and loses some energy as heat, so staying organized/alive costs a continuous input of energy — which is why you must keep taking in food. Same rubric (b graded on the entropy idea + 'why you must eat').

──────────── PROBLEM 2 (26 points) — The ATP cycle ────────────
SHOW ME: "(a) What is ATP's job in the cell, and how is it different from DNA? (b) Describe the ATP↔ADP cycle: what happens (to the molecule and to energy) when a cell SPENDS energy, and what happens when it RECHARGES. Use the words ATP, ADP, phosphate, and energy."
VETTED ANSWER: (a) ATP is the cell's energy currency — the molecule the cell spends to do work; DNA is the genetic instructions (a completely different job; similar-sounding name). (b) Spending: ATP loses its third phosphate to become ADP, releasing energy the cell uses for work. Recharging: energy from breaking down food attaches a phosphate back onto ADP to remake ATP. It cycles continuously.
RUBRIC: (a) 10 — ATP = energy currency the cell spends (5) + DNA = genetic instructions/not the same (5). (b) 16 — spending: ATP→ADP + phosphate + energy released (8); recharging: ADP + phosphate + energy→ATP (8). Judge meaning; the words should appear but exact phrasing is flexible. Calling ATP "DNA" or saying ATP is "used up forever" (no recharge) loses the relevant points.
FRESH VARIANT: "(a) Why can't a cell just burn glucose directly for every task — why does it need ATP? (b) A muscle cell contracts, using ATP. Walk through what the ATP molecule becomes and where the energy to remake it comes from." Answers: (a) glucose is a large 'big-bill' energy store; the cell needs small, immediately spendable 'change' (ATP) it can use in standard-sized packets for each task. (b) ATP → ADP + phosphate + energy (used for contraction); energy released by breaking down food (glucose) reattaches the phosphate to ADP to regenerate ATP. Same rubric.

──────────── PROBLEM 3 (24 points) — Activation energy & how enzymes work ────────────
SHOW ME: "An enzyme speeds up a reaction that releases energy overall. (a) Sketch-in-words the reaction-energy 'hill': where are reactants and products, and what is the activation energy? (b) What does the enzyme change about that hill, and what does it NOT change? (c) Name TWO other true facts about how enzymes work (e.g., active site/substrate specificity, reusable/not consumed)."
VETTED ANSWER: (a) Reactants start higher, products end lower (energy is released); between them is a hump — the activation energy, the barrier the reaction must climb to get going. (b) The enzyme lowers the activation energy (the hump), so the reaction goes faster; it does NOT change the energy of the reactants or products (it doesn't add energy or change how much energy is released). (c) any two: the enzyme is specific — its active site fits one substrate (lock-and-key / induced fit); it is a reusable catalyst, released unchanged (not used up); it doesn't make an impossible reaction possible, only a possible one faster.
RUBRIC: (a) 8 — reactants higher / products lower / activation energy = the barrier (≈3/3/2). (b) 10 — lowers activation energy → faster (6) + does NOT change start/end energy (4). (c) 6 — two valid facts (3 each). Saying the enzyme "adds energy" or "is used up" loses (b)/(c) accordingly.
FRESH VARIANT: "(a) Why are most life reactions too slow without enzymes — what's missing? (b) Two students argue: one says 'an enzyme gives the reaction more energy'; the other says 'an enzyme lowers the activation energy.' Who is right, and why is the other wrong? (c) Explain why one enzyme usually works on only one kind of substrate." Answers: (a) they need a starting push (activation energy) to get over the barrier; at body temperature few molecules have it, so reactions are too slow. (b) the second student is right — the enzyme lowers the activation-energy barrier (it does not add energy or change how much is released); the first is wrong. (c) the active site has a specific shape that fits only a particular substrate (lock-and-key / induced fit). Same rubric.

──────────── PROBLEM 4 (26 points) — Predict the enzyme's rate (temperature & pH) ────────────
SHOW ME: "A human enzyme is tested in four tubes at 5 °C, 22 °C, 37 °C, and 100 °C (boiled). (a) Rank the four from FASTEST to SLOWEST reaction rate, and say which one is essentially ZERO. (b) Explain WHY 37 °C is fastest and WHY the boiled tube is ~0 (use the words optimum and denature). (c) The same enzyme is then tested at pH 2, pH 7, and pH 11; it works best at pH 7. In one sentence, explain what's happening at pH 2 and pH 11."
VETTED ANSWER: (a) Fastest → slowest: 37 °C > 22 °C > 5 °C > 100 °C (boiled). The boiled tube (100 °C) is essentially zero. (b) 37 °C is the enzyme's optimum (body temperature) — the best balance of molecular motion and a stable shape, so the rate peaks; the boiled tube is ~0 because high heat denatures the enzyme (the protein unfolds and the active site is destroyed, permanently). (c) at pH 2 and pH 11 the enzyme is far from its optimal pH (7), so it begins to denature / loses its shape and the rate drops (it works best at pH 7).
RUBRIC: (a) 10 — correct ranking (6) + identifies boiled = 0 (4). (b) 12 — 37 °C = optimum, fastest (6) + boiled ~0 because denatured/active site destroyed (6). (c) 4 — far-from-optimal pH denatures/lowers activity. Saying "hotter is always faster" or ranking boiled as fastest loses (a)/(b).
FRESH VARIANT: "(a) Enzyme rate is measured at 10, 30, 40, and 95 °C (95 = near-boiling), optimum ~37 °C. Rank fastest→slowest and name the ~0 tube. (b) Explain why warming from 10 °C to 37 °C speeds the enzyme up but heating to 95 °C shuts it down. (c) Stomach pepsin works best at about pH 2; predict whether pepsin would work well at pH 7, and why." Answers: (a) 40 °C > 30 °C > 10 °C > 95 °C; the 95 °C tube is ~0. (b) up to the optimum, more heat means more molecular motion and faster reactions; past the optimum the protein denatures and the active site is destroyed, so it stops. (c) pepsin would work poorly at pH 7 because that is far from its optimal pH (~2), so it loses its proper shape/activity. Same rubric.

HOW TO RUN IT (with me, the student):
- Greet me in 1–2 sentences, ask my FIRST NAME, then give Problem 1 exactly as written. (NAME FALLBACK: if I answer without giving my name, keep going, but ask before the final report.)
- ONE problem at a time. Never show the whole set, the answers, the rubrics, or the variants.
- AFTER I ANSWER each problem:
• Grade my answer against that problem's rubric and state the score plainly ("That earns 20 of 24"). Judge MEANING, not wording.
• Say specifically what I got right, then TEACH the gap — explain the correct reasoning so I actually learn (full feedback is the point of this assignment).
• OFFER A RE-ATTEMPT: "Want to raise your score? I'll give you a similar problem." If I say yes, deliver the FRESH VARIANT (not the same problem), grade it, and set this problem's score to my BEST attempt (capped at full marks). I can retry as many times as I want.
• Move on when I'm satisfied.
- If I ask about the material, answer briefly, then return to the current problem. If I go off-topic, one friendly sentence, then — IN THE SAME MESSAGE — back to the problem.
- Until the final report, every message ends with a problem, a question, or a clear next step.
- Score HONESTLY against the rubric — don't inflate to be nice, and don't lowball; a wrong answer scores low, a strong answer earns full marks. Grade only against the vetted key above.

COMPLETION + REPORT. After I've finished all four problems (and any re-attempts), produce the report in EXACTLY this format — the FIRST LINE is my score:
STUDENT'S SCORE: X/100
WEEK 5 ASSIGNMENT — Energy Accounting
Student: [name] | Date: ___
Problem 1 (Energy & the two laws): a/24 — [one line]
Problem 2 (The ATP cycle): b/26 — [one line]
Problem 3 (Activation energy & enzymes): c/24 — [one line]
Problem 4 (Predict the enzyme's rate): d/26 — [one line]
Strongest skill: ___
Worth another look: ___
(The four problem scores must add up to the number on line 1.) Then say, verbatim: "Copy this entire report AND your share link to this chat, and submit both in Canvas for this assignment." End with one genuine sentence of encouragement.

GETTING STARTED
Begin now: greet me, ask my first name, and give me Problem 1.

⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯ COPY EVERYTHING ABOVE THIS LINE ⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯

Instructor grading note (Prof. Castellano)

• Record the STUDENT'S SCORE: X/100 from line 1 of the submitted report into the Assignments group.
• Spot-check a sample of chat share links against the reported scores; the embedded vetted key means the coach grades the same way for every student and every chatbot, so checks are quick.
• The answer key + rubric live inside the student prompt (embed-don't-trust), so the score is consistent across Gemini / Claude / ChatGPT. Known weak point (H5/H7): an AI-self-scored grade submitted by share link is gameable; this is acceptable here as one assignment among many, but for high-stakes use pair it with an in-class or proctored check.

Canvas placement block

canvas_object    = Assignment
title            = "Week 5 Assignment — Energy Accounting (adaptive)"
assignment_group = "Assignments"
points_possible  = 100
grading_type     = points
assignment_type  = adaptive
submission_types = [online_text_entry, online_url]   # paste the report (score on line 1) + the chat share link
due_offset_days  = 6
published        = true
provenance       = "~ Prof. Castellano's edition · Fall 2026 · built with thecoursemaker.com"

Traditional variant — for comparison. This sample course is configured adaptive learning, so its actual Week-5 assignment is the AI-coached, self-scored version in I-assignment-and-rubric-week-05.md. This file shows the same Week-5 skills built the traditional way — the student completes the work and submits it, and the instructor grades against the rubric — so you can see both formats side by side. (Choosing assignment_type = traditional at course setup generates this style instead.)

Course: Introduction to Biology — General Biology I (BIOL 101) · Silver Oak University (fictional sample) · Prof. Castellano
Objective assessed: Objective 4 (energy & thermodynamics; ATP; enzymes & activation energy; temperature/pH effects & denaturation) · SLO A (reason and predict from a model) · SLO B (connect an enzyme's structure to its function)
Worth 100 points · Assignments group = 15% of the grade

The Assignment

This week is about how a cell pays for the work of living (energy and ATP) and how enzymes make that work fast enough. In four short parts, you'll classify energy, walk the ATP cycle, reason about activation energy, and predict an enzyme's rate from its conditions. Submit your answers as a document upload or text entry in Canvas. You'll be graded on the rubric below — read it before you start.

Part 1 — Energy & the two laws (24 pts). (a) For each, say kinetic or potential energy: (i) a stretched bowstring; (ii) heat from a campfire; (iii) the chemical bonds in a glucose molecule; (iv) a sprinter running. (b) In one or two sentences, explain why biologists say a cell never "makes" energy — and name the law of thermodynamics that explains it.

Part 2 — The ATP cycle (26 pts). (a) What is ATP's job in the cell, and how is it different from DNA? (b) Describe the ATP↔ADP cycle: what happens (to the molecule and to the energy) when a cell spends energy, and what happens when it recharges. Use the words ATP, ADP, phosphate, and energy.

Part 3 — Activation energy & how enzymes work (24 pts). An enzyme speeds up a reaction that releases energy overall. (a) Describe in words the reaction-energy "hill": where are the reactants and products, and what is the activation energy? (b) What does the enzyme change about that hill, and what does it NOT change? (c) Name two other true facts about how enzymes work (e.g., active site / substrate specificity; reusable / not consumed).

Part 4 — Predict the enzyme's rate (26 pts). A human enzyme is tested in four tubes at 5 °C, 22 °C, 37 °C, and 100 °C (boiled). (a) Rank the four from fastest to slowest reaction rate, and say which one is essentially zero. (b) Explain why 37 °C is fastest and why the boiled tube is ~0 (use the words optimum and denature). (c) The same enzyme is then tested at pH 2, pH 7, and pH 11; it works best at pH 7. In one sentence, explain what's happening at pH 2 and pH 11.

Integrity & AI note. This is your own work, submitted for grading. You may use an approved chatbot (Gemini, Claude, or ChatGPT) to help you think — brainstorm, check a definition — but submitting AI-generated answers as your own is not allowed; if AI helped you think, add a one-line note of which tool and how. (Note: this is the traditional format. In this course's actual adaptive assignment, you work the problems with the chatbot and submit its self-scored report — see I-assignment-and-rubric-week-05.md.)

Rubric — 100 points

Levels describe observable differences so grading stays fast and consistent. (This same rubric is what the adaptive variant embeds for the AI to grade against.)

Instructor answer key — REMOVE BEFORE PUBLISHING TO STUDENTS

• Part 1: (a) (i) potential; (ii) kinetic; (iii) potential; (iv) kinetic. (b) Energy cannot be created or destroyed, only transformed (the first law of thermodynamics / conservation of energy), so a cell captures and transforms energy from food or sunlight rather than creating it.
• Part 2: (a) ATP = the cell's energy currency (the molecule it spends to do work); DNA = the genetic instructions — a different job, despite the similar-sounding name. (b) Spending: ATP loses its third phosphate to become ADP, releasing energy for work. Recharging: energy from breaking down food reattaches a phosphate onto ADP to remake ATP. The cycle runs continuously.
• Part 3: (a) Reactants start higher, products end lower (energy released); the activation energy is the hump/barrier between them. (b) The enzyme lowers the activation energy (→ faster); it does not change the energy of the reactants or products (doesn't add energy or change how much is released). (c) any two: enzyme is specific (active site fits one substrate; lock-and-key / induced fit); enzyme is a reusable catalyst, released unchanged; enzyme only speeds a possible reaction, doesn't make an impossible one happen.
• Part 4: (a) Fastest → slowest: 37 °C > 22 °C > 5 °C > 100 °C (boiled); the boiled tube (100 °C) is ~0. (b) 37 °C is the optimum (body temperature) — peak rate; the boiled tube is ~0 because heat denatures the enzyme (the protein unfolds and the active site is destroyed, permanently). (c) at pH 2 and pH 11 the enzyme is far from its optimal pH (7), so it denatures / loses its shape and activity drops. (The classic error to watch: "hotter is always faster," which ranks the boiled tube as fastest.)

Quality gate (self-checked): the temperature ranking and "boiled = 0" follow the lab's pre-computed model trend (rate rises to a ~37 °C optimum; denatured/boiled = 0), independently re-derived by a Python check — quantitative gate: PASS. All enzyme facts (lowers activation energy, reusable, denatures past optimum) match the Week-5 course definitions and OpenStax §6.5.

Canvas placement block

canvas_object    = Assignment
title            = "Week 5 Assignment — Energy Accounting (traditional)"
assignment_group = "Assignments"
points_possible  = 100
grading_type     = points
assignment_type  = traditional
submission_types = [online_upload, online_text_entry]
due_offset_days  = 6
published        = true
rubric_ref       = "week-05-assignment-rubric"
provenance       = "~ Prof. Castellano's edition · Fall 2026 · built with thecoursemaker.com"