Q: Which of the following equations correctly represents the overall reaction for photosynthesis?

$$6CO_2 + 12H_2O + \text{light energy} \rightarrow C_6H_{12}O_6$ + 6O_2 + 6H_2O$$

Question 1

Which of the following statements best describes substrate-level phosphorylation during glycolysis?

Accepted Answer

It is the direct transfer of a phosphate group from a substrate to ADP, forming ATP.

Question 2

During the transition step between glycolysis and the Krebs cycle, which of the following occurs?

Accepted Answer

Pyruvate is decarboxylated and combined with coenzyme A to form acetyl-CoA.

Question 3

Which of the following is the correct net ATP yield from glycolysis per molecule of glucose?

Accepted Answer

$$2$$

Question 4

In prokaryotic cells, where does the electron transport chain occur?

Accepted Answer

In the plasma membrane

Question 5

Which of the following is the final electron acceptor in aerobic respiration?

Accepted Answer

Oxygen ($$O_2)$$

Question 6

How many ATP molecules are produced from one NADH molecule during the electron transport chain in prokaryotes?

Accepted Answer

$$3$$

Question 7

Which process is responsible for the majority of ATP production during aerobic respiration?

Accepted Answer

Chemiosmosis

Question 8

Which of the following best describes the role of NADH and FADH2 in cellular respiration?

Accepted Answer

They deliver electrons to the electron transport chain.

Question 9

Which of the following is a feature of fermentation?

Accepted Answer

The final electron acceptor is an organic molecule such as pyruvate.

Question 10

A bacterium is found to convert nitrate ($$NO_3$$^-$$) to nitrite (NO_2$^-) $$during respiration. Which type of respiration is this organism performing?

Accepted Answer

Anaerobic respiration

Question 11

Which of the following equations correctly represents the overall reaction for photosynthesis?

Accepted Answer

$$6CO_2 + 12H_2O + 	ext{light energy} ightarrow C_6H_{12}O_6$ + 6O_2 + 6H_2O$$

Question 12

Which of the following statements about the Krebs cycle is TRUE?

Accepted Answer

It regenerates oxaloacetic acid at the end of each cycle.

Question 13

Which of the following is a correct statement about the ATP yield in prokaryotic aerobic respiration of one glucose molecule?

Accepted Answer

$$38$$ ATP are produced in total.

Question 14

Which of the following best explains why less ATP is produced from FADH2 than from NADH in the electron transport chain?

Accepted Answer

FADH2 enters the electron transport chain at a lower energy level than NADH.

Question 15

Which of the following is NOT a product of glycolysis?

Accepted Answer

FADH2

Question 16

Which of the following best describes chemiosmosis?

Accepted Answer

ATP is synthesized as protons flow through ATP synthase down their electrochemical gradient.

Question 17

Which of the following is a real-life application of lactic acid fermentation?

Accepted Answer

Production of yogurt and sauerkraut

Question 18

Which of the following is the main purpose of the transition step in cellular respiration?

Accepted Answer

To convert pyruvate into acetyl-CoA for entry into the Krebs cycle

Question 19

Which of the following is a distinguishing feature of fermentation compared to aerobic respiration?

Accepted Answer

Fermentation does not require the electron transport chain.

Question 20

Which of the following best describes the role of the proton motive force (PMF) in cellular respiration?

Accepted Answer

It drives the synthesis of ATP by ATP synthase.

Microbial Metabolism: Glycolysis, Respiration, Fermentation, and Photosynthesis

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