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

Question 1

Which of the following best describes the final electron acceptor in aerobic respiration?

Accepted Answer

Oxygen ($O_2$)

Question 2

During glycolysis, glucose is split into two molecules of which compound?

Accepted Answer

Pyruvate

Question 3

Which pathway yields fewer ATP molecules but produces NADPH and precursor metabolites for biosynthesis?

Accepted Answer

Pentose phosphate pathway

Question 4

In prokaryotic cells, where does the electron transport chain primarily occur?

Accepted Answer

Cell membrane

Question 5

Which of the following is NOT a product of the citric acid cycle?

Accepted Answer

Lactic acid

Question 6

What is the main reason facultative anaerobes grow more in the presence of oxygen?

Accepted Answer

Aerobic respiration produces more ATP than anaerobic respiration

Question 7

Which process involves the conversion of light energy into chemical energy stored in ATP and metabolites?

Accepted Answer

Photosynthesis

Question 8

Which of the following best explains how lactic acid bacteria cause milk to sour?

Accepted Answer

They convert lactose into lactic acid through fermentation

Question 9

Which of the following is a reactant in the Calvin-Benson cycle?

Accepted Answer

Carbon dioxide ($CO_2$)

Question 10

What is the main difference between aerobic and anaerobic respiration?

Accepted Answer

Aerobic respiration uses $O_2$ as the final electron acceptor, while anaerobic respiration uses other molecules

Question 11

Which metabolic pathway is responsible for the breakdown of fatty acids for energy production?

Accepted Answer

Beta-oxidation

Question 12

A bacterium is grown in a medium with a carbohydrate and a pH indicator. A color change indicates fermentation. What does this test identify?

Accepted Answer

The bacterium's carbohydrate fermentation capabilities

Question 13

Which of the following is a product of the Calvin-Benson cycle?

Accepted Answer

Glyceraldehyde 3-phosphate (G3P)

Question 14

Which of the following statements about fermentation is correct?

Accepted Answer

Fermentation results in incomplete glucose breakdown and minimal ATP production

Question 15

Which equation correctly represents the overall reaction for aerobic respiration of glucose?

Accepted Answer

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

Question 16

Which of the following is a key function of the pentose phosphate pathway?

Accepted Answer

Generation of NADPH and ribose-5-phosphate for biosynthesis

Question 17

Which process is responsible for the majority of ATP production in eukaryotic cells?

Accepted Answer

Electron transport chain in mitochondria

Question 18

Which of the following is true about the citric acid cycle?

Accepted Answer

It produces NADH, FADH$_2$, and $CO_2$

Question 19

Which of the following best describes the role of NADH and FADH$_2$ in cellular respiration?

Accepted Answer

They donate electrons to the electron transport chain to drive ATP synthesis

Question 20

A patient’s muscle cells are deprived of oxygen during intense exercise. Which metabolic pathway will be most active?

Accepted Answer

Lactic acid fermentation

Microbial Metabolism and Energy Production: Study Notes

Study Guide - Practice Questions