Question 1

Which of the following best describes the overall chemical equation for aerobic cellular respiration in plants?

Accepted Answer

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

Question 2

During which stage of cellular respiration is the majority of ATP produced?

Accepted Answer

Electron transport chain and oxidative phosphorylation

Question 3

Where in the plant cell does glycolysis occur?

Accepted Answer

Cytoplasm

Question 4

Which molecule acts as the final electron acceptor in the electron transport chain during aerobic respiration?

Accepted Answer

Oxygen ($$O_2)$$

Question 5

If a plant is placed in a respirometer to measure respiration, what modification must be made to ensure only respiration is measured and not photosynthesis?

Accepted Answer

Place the apparatus in the dark

Question 6

Which of the following is a product of the Krebs cycle?

Accepted Answer

Carbon dioxide

Question 7

How many net ATP molecules are produced from glycolysis per glucose molecule?

Accepted Answer

$$2$$

Question 8

Which process allows plants to regenerate NAD+ in the absence of oxygen?

Accepted Answer

Fermentation

Question 9

What is the main purpose of the proton gradient created by the electron transport chain?

Accepted Answer

To drive ATP synthesis via chemiosmosis

Question 10

Which of the following best explains why cellular respiration and photosynthesis are considered complementary processes?

Accepted Answer

Photosynthesis stores energy in glucose, while respiration releases energy from glucose

Question 11

A plant cell is deprived of oxygen. Which process will it use to continue producing ATP?

Accepted Answer

Fermentation

Question 12

Which of the following is NOT a product of aerobic cellular respiration?

Accepted Answer

Glucose

Question 13

During the Krebs cycle, acetyl-CoA combines with oxaloacetate to form which molecule?

Accepted Answer

Citrate

Question 14

Which cellular compartment is the site of the electron transport chain in plant cells?

Accepted Answer

Inner mitochondrial membrane

Question 15

What is the net yield of ATP from one molecule of glucose after complete aerobic respiration in plants?

Accepted Answer

$$38$$

Question 16

Which of the following would most likely occur if a plant cell is exposed to a toxin that inhibits ATP synthase?

Accepted Answer

ATP production would decrease

Question 17

Which step in cellular respiration produces the most NADH?

Accepted Answer

Krebs cycle

Question 18

In the context of energy flow in ecosystems, what is the primary role of cellular respiration in plants?

Accepted Answer

To release stored energy from glucose for cellular activities

Question 19

Which of the following best describes chemiosmosis?

Accepted Answer

The flow of protons through ATP synthase to drive ATP production

Question 20

Which of the following is a key difference between the Calvin cycle and the Krebs cycle?

Accepted Answer

The Calvin cycle occurs in the chloroplast, while the Krebs cycle occurs in the mitochondria

Plant Cellular Respiration: Mechanisms, Pathways, and Energy Yield

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