Q: Which equation correctly represents the overall process of aerobic cellular respiration?

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

Question 1

Which of the following statements best describes the relationship between catabolism and anabolism in microbial metabolism?

Accepted Answer

Catabolism breaks down larger molecules into smaller products, releasing energy, while anabolism uses that energy to build macromolecules from smaller products.

Question 2

Which equation correctly represents the overall process of aerobic cellular respiration?

Accepted Answer

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

Question 3

Which of the following is NOT a function of ATP in microbial metabolism?

Accepted Answer

ATP acts as an electron carrier in redox reactions.

Question 4

Apoenzymes require which of the following to become functional holoenzymes?

Accepted Answer

A cofactor (inorganic ion or coenzyme)

Question 5

Which enzyme class is responsible for transferring electrons or hydrogen atoms from one molecule to another?

Accepted Answer

Oxidoreductase

Question 6

What is the effect of an enzyme on the activation energy of a chemical reaction?

Accepted Answer

It decreases the activation energy, making the reaction more likely to occur.

Question 7

Which of the following statements about enzyme specificity is correct?

Accepted Answer

Enzymes have active sites that fit specific substrates, similar to a lock and key.

Question 8

Which factor does NOT directly affect the rate of enzymatic reactions?

Accepted Answer

The color of the enzyme

Question 9

What would happen to an enzyme-catalyzed reaction if the enzyme is denatured?

Accepted Answer

The enzyme would lose its function and the reaction would slow or stop.

Question 10

Which of the following best describes allosteric activation?

Accepted Answer

A molecule binds to a site other than the active site, causing the enzyme's active site to become functional.

Question 11

Which process provides cells with an alternative source of NAD+ when oxygen is not available?

Accepted Answer

Fermentation

Question 12

During cellular respiration, what is the final electron acceptor in aerobic respiration?

Accepted Answer

Oxygen ($$\mathrm{O_2$})$$

Question 13

Which of the following is a product of glycolysis?

Accepted Answer

Pyruvic acid

Question 14

Which pathway produces the greatest number of ATP molecules per glucose in prokaryotes?

Accepted Answer

Electron transport chain

Question 15

Which of the following statements about fermentation is TRUE?

Accepted Answer

Fermentation regenerates NAD+ for glycolysis and produces less ATP than respiration.

Question 16

Which of the following is a possible harmful effect of microbial fermentation in humans?

Accepted Answer

Destruction of tissue by Clostridium perfringens, leading to gangrene

Question 17

Which equation represents substrate-level phosphorylation?

Accepted Answer

$$	ext{ADP} + 	ext{P}_{	ext{substrate}} ightarrow 	ext{ATP} + 	ext{substrate}$$

Question 18

Which electron carrier is reduced during glycolysis?

Accepted Answer

NAD+

Question 19

Which of the following is NOT a product of the Krebs cycle per molecule of glucose?

Accepted Answer

6 FADH2

Question 20

Which process uses the energy from a proton gradient to synthesize ATP?

Accepted Answer

Chemiosmosis

Microbial Metabolism: Chapter Five

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