BIOS 255 Week 2 Quiz Exam 3 (Latest
Update ) Anatomy and
Physiology IV with Lab | Questions &
Answers | 100% Correct | Grade A -
Chamberlain
1. Which process converts glucose into pyruvate?
A. Glycolysis
B. Krebs cycle
C. Electron transport chain
D. Fermentation
Correct Answer: A
Rationale: Glycolysis breaks down glucose into pyruvate in the
cytoplasm, producing ATP and NADH.
2. Where does the Krebs cycle occur?
A. Cytoplasm
B. Mitochondrial matrix
C. Smooth ER
D. Nucleus
Correct Answer: B
Rationale: The Krebs cycle takes place in the mitochondrial matrix,
producing NADH, FADH2, and ATP.
,3. Which molecule is the final electron acceptor in aerobic
respiration?
A. NAD+
B. Oxygen
C. FAD
D. Pyruvate
Correct Answer: B
Rationale: Oxygen accepts electrons at the end of the electron
transport chain to form water.
4. Which process produces ATP without oxygen?
A. Aerobic respiration
B. Fermentation
C. Krebs cycle
D. Electron transport chain
Correct Answer: B
Rationale: Fermentation allows ATP production anaerobically by
regenerating NAD+.
5. Which compound carries electrons from glycolysis to the
electron transport chain?
A. ATP
B. NADH
C. FADH2
D. CO2
,Correct Answer: B
Rationale: NADH transfers high-energy electrons to the electron
transport chain.
6. Which organelle is the site of oxidative phosphorylation?
A. Mitochondria
B. Chloroplast
C. Lysosome
D. Ribosome
Correct Answer: A
Rationale: Oxidative phosphorylation occurs in the inner
mitochondrial membrane.
7. Which molecule is a product of glycolysis?
A. Glucose
B. Pyruvate
C. ATP only
D. Oxygen
Correct Answer: B
Rationale: Glycolysis converts glucose into two molecules of
pyruvate.
8. Which cycle generates CO2 as a byproduct of cellular
respiration?
, A. Glycolysis
B. Krebs cycle
C. Electron transport chain
D. Fermentation
Correct Answer: B
Rationale: CO2 is released during the oxidation of acetyl-CoA in
the Krebs cycle.
9. Which stage of cellular respiration produces the most ATP?
A. Glycolysis
B. Krebs cycle
C. Electron transport chain
D. Fermentation
Correct Answer: C
Rationale: The electron transport chain produces the majority of
ATP through chemiosmosis.
10. What is the net ATP produced per glucose molecule in
glycolysis?
A. 1
B. 2
C. 4
D. 36
Correct Answer: B
Update ) Anatomy and
Physiology IV with Lab | Questions &
Answers | 100% Correct | Grade A -
Chamberlain
1. Which process converts glucose into pyruvate?
A. Glycolysis
B. Krebs cycle
C. Electron transport chain
D. Fermentation
Correct Answer: A
Rationale: Glycolysis breaks down glucose into pyruvate in the
cytoplasm, producing ATP and NADH.
2. Where does the Krebs cycle occur?
A. Cytoplasm
B. Mitochondrial matrix
C. Smooth ER
D. Nucleus
Correct Answer: B
Rationale: The Krebs cycle takes place in the mitochondrial matrix,
producing NADH, FADH2, and ATP.
,3. Which molecule is the final electron acceptor in aerobic
respiration?
A. NAD+
B. Oxygen
C. FAD
D. Pyruvate
Correct Answer: B
Rationale: Oxygen accepts electrons at the end of the electron
transport chain to form water.
4. Which process produces ATP without oxygen?
A. Aerobic respiration
B. Fermentation
C. Krebs cycle
D. Electron transport chain
Correct Answer: B
Rationale: Fermentation allows ATP production anaerobically by
regenerating NAD+.
5. Which compound carries electrons from glycolysis to the
electron transport chain?
A. ATP
B. NADH
C. FADH2
D. CO2
,Correct Answer: B
Rationale: NADH transfers high-energy electrons to the electron
transport chain.
6. Which organelle is the site of oxidative phosphorylation?
A. Mitochondria
B. Chloroplast
C. Lysosome
D. Ribosome
Correct Answer: A
Rationale: Oxidative phosphorylation occurs in the inner
mitochondrial membrane.
7. Which molecule is a product of glycolysis?
A. Glucose
B. Pyruvate
C. ATP only
D. Oxygen
Correct Answer: B
Rationale: Glycolysis converts glucose into two molecules of
pyruvate.
8. Which cycle generates CO2 as a byproduct of cellular
respiration?
, A. Glycolysis
B. Krebs cycle
C. Electron transport chain
D. Fermentation
Correct Answer: B
Rationale: CO2 is released during the oxidation of acetyl-CoA in
the Krebs cycle.
9. Which stage of cellular respiration produces the most ATP?
A. Glycolysis
B. Krebs cycle
C. Electron transport chain
D. Fermentation
Correct Answer: C
Rationale: The electron transport chain produces the majority of
ATP through chemiosmosis.
10. What is the net ATP produced per glucose molecule in
glycolysis?
A. 1
B. 2
C. 4
D. 36
Correct Answer: B
