Q: Which of the following best describes the overall chemical equation for aerobic cellular respiration in eukaryotes?

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

Question 1

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

Accepted Answer

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

Question 2

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

Accepted Answer

Oxidative phosphorylation (Electron Transport Chain and chemiosmosis)

Question 3

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

Accepted Answer

Oxygen ($$O_2)$$

Question 4

If a toxin blocks the function of ATP synthase in mitochondria, which process would be directly affected?

Accepted Answer

Synthesis of ATP via chemiosmosis

Question 5

Which of the following statements about glycolysis is TRUE?

Accepted Answer

It produces pyruvate, ATP, and NADH.

Question 6

A patient is diagnosed with a mitochondrial disorder that impairs the electron transport chain. Which of the following would most likely be observed in their cells?

Accepted Answer

Increased production of lactic acid due to reliance on fermentation

Question 7

Which of the following best explains why fats yield more ATP per gram than carbohydrates during cellular respiration?

Accepted Answer

Fats have more hydrogen atoms, providing more high-energy electrons for the electron transport chain.

Question 8

Which process regenerates NAD$$^+ so $$that glycolysis can continue in the absence of oxygen?

Accepted Answer

Fermentation

Question 9

In the citric acid cycle, which molecule is produced as a waste product and released from the cell?

Accepted Answer

Carbon dioxide ($$CO_2)$$

Question 10

Which of the following is a correct sequence of events in aerobic cellular respiration?

Accepted Answer

Glycolysis $$\rightarrow$$ Citric Acid Cycle $$\rightarrow$$ Electron Transport Chain

Question 11

Which of the following is an example of substrate-level phosphorylation?

Accepted Answer

ATP production during glycolysis

Question 12

A cell is exposed to cyanide, which inhibits cytochrome c oxidase in the electron transport chain. What is the most immediate effect?

Accepted Answer

Oxygen will no longer be reduced to water.

Question 13

Which of the following best describes the role of NAD$$^+ in $$cellular respiration?

Accepted Answer

It serves as an electron carrier, accepting electrons during glycolysis and the citric acid cycle.

Question 14

Which of the following would most likely occur if the inner mitochondrial membrane became permeable to protons (H$$^+$$)?

Accepted Answer

ATP synthesis via chemiosmosis would decrease.

Question 15

Which of the following is TRUE regarding the energy flow in ecosystems?

Accepted Answer

Energy flows from producers to consumers and is eventually lost as heat.

Question 16

Which of the following is a major difference between cellular respiration in prokaryotes and eukaryotes?

Accepted Answer

Prokaryotes carry out the electron transport chain on their plasma membrane, while eukaryotes use the inner mitochondrial membrane.

Question 17

Which of the following is the most reduced form of carbon in the series below?

Accepted Answer

Methane ($$CH_4)$$

Question 18

Which of the following is a direct product of the conversion of pyruvate to acetyl-CoA?

Accepted Answer

NADH

Question 19

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

Accepted Answer

Glycolysis

Question 20

Which of the following best explains why only a portion of the energy in glucose is transferred to ATP during cellular respiration?

Accepted Answer

Some energy is lost as heat during metabolic processes.

Cellular Respiration: Energy Flow and Metabolic Pathways in Cells

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