Unit 3: Cellular Energetics
Biology · Unit 3 · Paper 3

Cellular Energetics unit test

A test on this unit alone, marked as a percentage and a letter grade — for the test your class is actually sitting, rather than for May. Answer everything, then submit once: seeing the answer to question 3 before attempting question 4 makes the final percentage meaningless.

Paper 1Paper 2Paper 3
Each paper is built from this unit’s 40 terms and is the same for everyone, so a teacher can assign “Unit 3, Paper 3” and every student sits the identical test. Multiple choice is marked objectively; the written sections you mark yourself against the model answer and rubric.
Suggested time 31 min 28 points0/17 attempted
1

Calvin cycle

2

Light-dependent reactions

3

Activation energy

4

Lab: Cellular Respiration

5

Chemiosmosis

6

Enzyme specificity

7

Absorption spectrum vs action spectrum

8

Electron transport chain

9

Allosteric regulation

10

Why oxygen matters

11

Proton gradient

12

Photolysis of water

Short answer 1. Define or explain: Feedback inhibition

3 pts

Short answer 2. Define or explain: Rubisco and photorespiration

3 pts

Short answer 3. Define or explain: Photosystems II and I

3 pts

Short answer 4. Define or explain: Glycolysis

3 pts

Free response

4 pts

A student seals an aquatic plant in a tube with water and a CO₂ indicator and exposes it to bright light for one hour. Predict and explain the change in CO₂ concentration.

Describe the role of the electron transport chain (ETC) in generating ATP during aerobic respiration, including the source of the proton gradient and the enzyme that makes ATP.

Explain what happens to ATP production if the inner mitochondrial membrane becomes permeable to protons.