metabolism online question

Question 1

Which of these processes occurs in the cytosol?
A. the citric acid cycle
B. glycolysis
C. the electron transport system
D. the preparatory reaction

Answer 1

B. glycolysi

Question 2

Complete oxidative breakdown of glucose results in ______ ATP molecules.
A. 2
B. 4
C. 32
D. 36
E. 39

Answer 2

D. 36

Question 3

The prepartory reaction breaks
A. glucose into pyruvates.
B. pyruvates into glucose.
C. pyruvates into acetyl-CoA and carbon dioxide.
D. pyruvates into acetyl-CoA and water.
E. acetyl CoA into pyruvates and carbon dioxide.

Answer 3

C. pyruvates into acetyl-CoA and carbon dioxide.

Question 4

The first phase of aerobically cellular respiration is:
A. the citric acid cycle.
B. glycolysis.
C. the electron transport system.
D. fermentation.
E. the preparatory reaction.

Answer 4

B. glycolysis.

Question 5

Which process produces both NADH and FADH2?
A. the citric acid cycle
B. glycolysis
C. the electron transport system
D. fermentation
E. the preparatory reaction

Answer 5

A. the citric acid cycle

Question 6

Which process produces alcohol or lactate?
A. the citric acid cycle
B. glycolysis
C. the electron transport system
D. fermentation
E. the preparatory reaction

Answer 6

D. fermentation

Question 7

Which process reduces molecular oxygen to water?
A. the citric acid cycle
B. glycolysis
C. the electron transport system
D. fermentation
E. the preparatory reaction

Answer 7

C. the electron transport system

Question 8

This product of glycolysis, _______, is degraded in the final stages of aerobic pathways.
A. acetyl - CoA
B. pyruvate
C. water
D. lactic acid
E. oxaloacetate

Answer 8

B. pyruvate

Question 9

In aerobic cellular respiration, the largest number of ATPs are produced
A. inside the mitochondria matrix and leave through a channel protein.
B. inside the mitochondria matrix and diffuse out through the membrane.
C. embedded in the cristae membranes and diffuse both directions.
D. outside the mitochondria and diffuse in through the membrane.
E. outside the mitochondria and enter through a channel protein.

Answer 9

A. inside the mitochondria matrix and leave through a channel protein.

Question 10

The electron transport chain and chemiosmosis produces ______ ATP from each NADH and/or _________ ATP from each FADH2 entering the system.
A. 4; 2
B. 3; 2
C. 2: 4
D. 2; 3

Answer 10

B. 3; 2

Question 11

One turn of the citric acid cycle produces
A. 2 NADH, 2 FADH2, 2 ATP.
B. 3 NADH, 1 FADH2, 1 ATP.
C. 1 NADH, 3 FADH2, 2 ATP.
D. 3 NADH, 2 FADH2, 1 ATP.
E. 3 NADH, 1 FADH2, 2 ATP.

Answer 11

B. 3 NADH, 1 FADH2, 1 ATP.

Question 12

Acetyl-CoA is produced from
A. pyruvate and a coenzyme.
B. citric acid and a coenzyme.
C. ATP and pyruvate.
D. CO2 and pyruvate.
E. citric acid and CO2.

Answer 12

A. pyruvate and a coenzyme.

Question 13

The carbon dioxide we exhale is produced in
A. glycolysis.
B. the electron transport system.
C. lactate fermentation.
D. the citric acid cycle.

Answer 13

D. the citric acid cycle.

Question 14

Glycolyis occurs before fermentation.
True False

Answer 14

True

Question 15

Glycolysis occurs before the preparatory reaction and the citric acid cycle.
True False

Answer 15

True

Question 16

Glycolysis is an aerobic process.
True False

Answer 16

False

Question 17

Glycolysis produces 1 pyruvate and 3 NADH coenzymes.
True False

Answer 17

False

Question 18

Glycolysis is a catabolic process.
True False

Answer 18

True

Question 19

Degradative reactions
A. cause death.
B. can drive anabolism.
C. tend to be endergonic.
D. include the buildup of products such as complex proteins and nucleic acids.
E. All of the choices are true.

Answer 19

B. can drive anabolism.

Question 20

For fatty acids to enter the citric acid cycle of aerobic respiration, the fatty acids must be:
A. deaminated.
B. combined with glycerol.
C. combined with ATP.
D. converted to acetyl groups.
E. converted into five-carbon sugars.

Answer 20

D. converted to acetyl groups.