Biology Test 2 - Ch.7

Question 1

An autotroph is an organism that..

Answer 1

extracts energy from organic sources, and converts energy from sunlight into chemical energy

Question 2

Which of the following processes is (are) required for the complete oxidation of glucose?

Answer 2

the citric acid cycle, and glycolysis, and pyruvate oxidation

Question 3

Which of the following is NOT a product of glycolysis?

Answer 3

CO2

Question 4

Glycolysis produces ATP by..

Answer 4

substrate-level phosphorylation

Question 5

What is the role of NAD+ in the process of cellular respiration?

Answer 5

it functions as an electron carrier

Question 6

The reactions of the citric acid cycle occur in the..

Answer 6

matrix of the mitochondria

Question 7

The electrons carried by NADH and FADH2 can be..

Answer 7

moved between proteins in the inner membrane of the mitochondrion.

Question 8

Which of the following is NOT a true statement regarding cellular respiration?

Answer 8

electrons have a higher potential energy at the end of the process

Question 9

The direct source of energy for the ATP produced by ATP synthase comes from

Answer 9

a proton gradient

Question 10

Anaerobi respiration..

Answer 10

yields less energy than aerobic respiration because other final electron acceptors have lower affinity for electrons than O2.

Question 11

What is the importance of fermentation to cellular metabolism?

Answer 11

It oxidizes NADH to NAD+ in the absence of O2.

Question 12

The link between electron transport and ATP synthesis..

Answer 12

is a proton gradient.

Question 13

A chemical agent that makes holes in the inner membrane of the mitochondria would..

Answer 13

stop ATP synthesis.

Question 14

Yeast cells that have mutations in genes that encode enzymes in glycolysis can still grow on glycerol. They are able to utilize glycerol because it..

Answer 14

can feed into the citric acid cycle and generate ATP via electron transport and chemiosmosis.