Question 1

Which of the following best describes the role of chemiosmosis in cellular respiration?

Accepted Answer

It generates ATP by using the energy from a proton gradient across a membrane.

Question 2

During glycolysis, what is the net gain of ATP molecules per molecule of glucose?

Accepted Answer

$$2$$

Question 3

Which equation correctly summarizes the overall process of cellular respiration?

Accepted Answer

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

Question 4

In the citric acid cycle, how many NADH molecules are produced per turn of the cycle?

Accepted Answer

$$3$$

Question 5

Which molecule is the final electron acceptor in the electron transport chain of aerobic respiration?

Accepted Answer

Oxygen ($$O_2)$$

Question 6

What is the primary function of NADH and FADH$$_2 in $$cellular respiration?

Accepted Answer

They transport electrons to the electron transport chain.

Question 7

If a mutation prevents the formation of acetyl CoA from pyruvate, which process would be directly affected?

Accepted Answer

Citric acid cycle

Question 8

Which of the following is NOT a product of the citric acid cycle per turn?

Accepted Answer

Glucose

Question 9

A medical student is experiencing high levels of stress, anxiety, and depression. According to the study, which factor is most strongly correlated with these symptoms?

Accepted Answer

Smartphone addiction

Question 10

Which phase of glycolysis requires an input of ATP?

Accepted Answer

Energy investment phase

Question 11

How many molecules of pyruvate are produced from one molecule of glucose during glycolysis?

Accepted Answer

$$2$$

Question 12

Which of the following best explains why oxygen is essential for efficient ATP production in eukaryotic cells?

Accepted Answer

Oxygen acts as the final electron acceptor in the electron transport chain, allowing chemiosmosis to produce ATP.

Question 13

Which process directly produces the most ATP during cellular respiration?

Accepted Answer

Chemiosmosis (oxidative phosphorylation)

Question 14

A patient with a genetic defect in the electron transport chain cannot create a proton gradient across the mitochondrial membrane. What is the most likely consequence?

Accepted Answer

ATP synthesis via chemiosmosis will be severely reduced.

Question 15

Which of the following is a waste product of the citric acid cycle?

Accepted Answer

CO$$_2$$

Question 16

If a cell is deprived of oxygen, which process will continue to function?

Accepted Answer

Glycolysis

Question 17

Which of the following best describes the relationship found between smartphone addiction and mental health among medical students?

Accepted Answer

Smartphone addiction is positively correlated with depression, anxiety, and stress.

Question 18

Which step in cellular respiration produces the most NADH per glucose molecule?

Accepted Answer

Citric acid cycle

Question 19

A scientist measures the ATP yield from one molecule of glucose in a eukaryotic cell. Which of the following is the most accurate estimate for the total ATP produced under aerobic conditions?

Accepted Answer

$$30-32$$

Question 20

Which of the following is the correct sequence of major steps in aerobic cellular respiration?

Accepted Answer

Glycolysis → Pyruvate oxidation → Citric acid cycle → Electron transport chain

Cellular Respiration: How Life on Earth Makes ATP

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