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

Question 1

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

Accepted Answer

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

Question 2

During glycolysis, which enzyme catalyzes the conversion of glucose to glucose-6-phosphate, consuming one ATP molecule?

Accepted Answer

Hexokinase

Question 3

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

Accepted Answer

Oxidative phosphorylation

Question 4

In the absence of oxygen, which pathway allows cells to continue producing ATP?

Accepted Answer

Fermentation

Question 5

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

Accepted Answer

2

Question 6

Which molecule is the final electron acceptor in aerobic cellular respiration?

Accepted Answer

O$$_2$$

Question 7

What is the total maximum number of ATP molecules produced from one molecule of glucose during cellular respiration in eukaryotic cells?

Accepted Answer

32

Question 8

Which of the following statements about the citric acid cycle is correct?

Accepted Answer

It produces ATP via substrate-level phosphorylation.

Question 9

During the oxidation of pyruvate to acetyl CoA, which of the following occurs?

Accepted Answer

NAD$$^+ is $$reduced to NADH

Question 10

Which molecules carry electrons from glycolysis and the citric acid cycle to the electron transport chain?

Accepted Answer

NADH and FADH$$_2$$

Question 11

If a cell is deprived of oxygen, which process will be directly inhibited first?

Accepted Answer

Electron transport chain

Question 12

Which of the following is a waste product of cellular respiration?

Accepted Answer

CO$$_2$$

Question 13

Which step in cellular respiration occurs in the cytosol of eukaryotic cells?

Accepted Answer

Glycolysis

Question 14

How many times does the citric acid cycle turn for each molecule of glucose oxidized?

Accepted Answer

Twice

Question 15

Which enzyme catalyzes the conversion of fructose-6-phosphate to fructose-1,6-bisphosphate in glycolysis?

Accepted Answer

Phosphofructokinase

Question 16

Which phase of glycolysis results in the net production of ATP and NADH?

Accepted Answer

Energy payoff phase

Question 17

Which of the following is true about substrate-level phosphorylation?

Accepted Answer

It involves direct transfer of a phosphate group to ADP from a substrate.

Question 18

Which of the following is NOT a fuel source for cellular respiration?

Accepted Answer

Nucleic acids

Question 19

Which enzyme splits fructose-1,6-bisphosphate into two three-carbon sugars during glycolysis?

Accepted Answer

Aldolase

Question 20

Which of the following statements about fermentation is correct?

Accepted Answer

It occurs without oxygen and yields less ATP than aerobic respiration.

Cellular Respiration and Fermantion Pt. 1

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