Sample Questions
1. When no oxygen is present, human cells convert pyruvate into
A. citrate
B. acetyl-Coenzyme A
C. lactic acid
D. OAA (oxaloacetic acid)
E. Acetaldehyde
2. Which of the following correctly matches a cellular respiration
process with the net number of ATP molecules it produces (for
each molecule of glucose)?
A. alcohol fermentation; 36 ATPs
B. glycolysis; 2 ATPs
C. Krebs cycle; 4 ATPs
D. electron transport chain; 10 ATPs
E. lactate fermentation; 32 ATPs
3. The electron transport chain for cellular respiration lies in the
A. cellular fluid (cytoplasm)
B. thylakoid
C. matrix of the mitochondria
D. stroma
E. christae of the mitochondria
4. In the light-independent reactions of photosynthesis,
A. Electrons from photosystem II are passed to the
beginning of the electron transport system
B. NADP+ is reduced to NADPH
C. PGAL is produced
D. ADP is phosphorylated
E. Water is split
5. Which of the following is a possible path for pyruvate molecules
that were formed during glycolysis?
A. Alcohol fermentation
B. Krebs cycle
C. Lactic acid fermentation
D. All of the above
