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

$$C_6H_{12}O_6$ + 6O_2 \rightarrow 6CO_2 + 6H_2O + \text{Energy (ATP + heat)}$$

Question 1

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

Accepted Answer

$$C_6H_{12}O_6$ + 6O_2 ightarrow 6CO_2 + 6H_2O + 	ext{Energy (ATP + heat)}$$

Question 2

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

Accepted Answer

Oxidative phosphorylation

Question 3

What is the primary role of oxygen in cellular respiration?

Accepted Answer

To act as an acceptor for electrons, forming water

Question 4

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

Accepted Answer

O$$_2$$

Question 5

In glycolysis, what is the net gain of ATP and NADH per molecule of glucose?

Accepted Answer

$$2$$ ATP and $$2$$ NADH

Question 6

Which process occurs in the cytosol of eukaryotic cells?

Accepted Answer

Fermentation and glycolysis

Question 7

What is the function of NAD$$^+ in $$cellular respiration?

Accepted Answer

It acts as an electron carrier, accepting electrons during redox reactions

Question 8

Which of the following statements about fermentation is correct?

Accepted Answer

Fermentation regenerates NAD$$^+ by $$transferring electrons to pyruvate or its derivatives

Question 9

In the citric acid cycle, what is the fate of the carbon atoms from acetyl-CoA?

Accepted Answer

They are released as CO$$_2$$

Question 10

Which of the following is a correct description of substrate-level phosphorylation?

Accepted Answer

The direct transfer of a phosphate group from a substrate to ADP to form ATP

Question 11

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

Decreased ATP production and increased reliance on glycolysis

Question 12

Which of the following is true regarding the energy yield from cellular respiration?

Accepted Answer

About 34% of the energy in glucose is transferred to ATP, with the rest lost as heat

Question 13

Which of the following organisms can survive using either fermentation or cellular respiration, depending on oxygen availability?

Accepted Answer

Facultative anaerobes

Question 14

In anaerobic respiration, what can serve as a final electron acceptor instead of oxygen?

Accepted Answer

Sulfate ion ($$SO_4$$^{2-}$$)

Question 15

Which feedback mechanism regulates cellular respiration to prevent wasteful ATP production?

Accepted Answer

Feedback inhibition

Question 16

Which of the following best explains why glycolysis is considered an ancient metabolic pathway?

Accepted Answer

It occurs in nearly all organisms and does not require oxygen

Question 17

During chemiosmosis, what drives the synthesis of ATP?

Accepted Answer

The movement of H$$^+$$ ions down their concentration gradient through ATP synthase

Question 18

Which of the following is a product of lactic acid fermentation?

Accepted Answer

Lactate

Question 19

If a cell is deprived of NAD$$^+$$, which process will immediately stop?

Accepted Answer

Glycolysis

Question 20

Which of the following best describes the role of the citric acid cycle in metabolism?

Accepted Answer

It completes the energy-yielding oxidation of organic molecules

Cellular Respiration and Fermentation: Study Notes (Campbell Biology, Chapter 9)

Guida di studio - Domande di pratica

Study guide - Flashcard