chapter 9 quiz

Question 1

carbon dioxide (CO2) is released during which of the following stages of cellular respiration:

a:glycolysis and the oxidation of pyruvate to acetyl CoA
b:the oxidation of pyruvate to acetyl CoA and then citric acid cycle
c: the citric acid cycle and oxidative phosphorylation
d: oxidative phosphorylation and fermentation

Answer 1

the oxidation of pyruvate to acetyl CoA and then citric acid cycle

Question 2

in addition to atp what are the end products of glycolysis

a: co2 and h2o
b:co2 and pyruvate
c:nadh and pyruvate
d:co2 and nadh

Answer 2

nadh and pyruvate

Question 3

which of the following is the correct sequence of stages in cellular respiration

a: glycolysis, citric acid cycle, electron transport chain
b:citric acid cycle, glycolysis, electron transport chain
c:citric acid cycle, electron transport chain, glycolysis
d:electron transport chain, glycolysis, citric acid cycle

Answer 3

glycolysis, citric acid cycle, electron transport chain

Question 4

the oxygen consumed during cellular respiration is involved directly in which process or event

a:glycolysis
b:the citric acid cycle
c:accepting electrons at the end of the electron transport chain
d:the oxidation of pyruvate to acetyl CoA

Answer 4

accepting electrons at the end of the electron transport chain

Question 5

which of these equations describes aerobic respiration?

a:glucose->lactic acid+energy
b:energy+carbon dioxide+water->glucose+oxygen+water
c:glucose->ethyl alcohol+carbon dioxide+energy
d:glucose+oxygen->carbon dioxide+water+energy

Answer 5

glucose+oxygen->carbon dioxide+water+energy

Question 6

which of the following statements describes NAD+

a:nad+ is reduced to nadh during glycolysis, pyruvate oxidation, and the citric acid cycle
b:nad+ has more chemical energy than nadh
c:nad+ is oxidized by the action of hydrogenases
d:nad+can donate electrons for the use in oxidative phosphorylation

Answer 6

nad+ is reduced to nadh during glycolysis, pyruvate oxidation, and the citric acid cycle

Question 7

the molecule that functions as the reducing agent (electron donor) in a redox or oxidation-reduction reaction

a:gains electrons and gains potential energy
b:loses electrons and loses potential energy
c:gains electrons and loses potential energy
d:loses electrons and gains potential energy

Answer 7

loses electrons and loses potential energy

Question 8

what is the term for metabolic pathways that release stored energy by breaking down complex molecules

a:anabolic pathways
b:catabolic pathways
c:fermentation pathways
d:thermodynamic pathways

Answer 8

catabolic pathways

Question 9

which of the following normally occurs regardless of whether or not oxygen (o2) is present

a:glycolysis
b:fermentation
c:citric acid cycle
d:oxidation of pyruvate to acetyl CoA

Answer 9

glycolysis

Question 10

in the absence of oxygen, yeast cells can obtain energy by fermentation resulting in the production of

a:ATP, CO2 and ethanol (ethyl alcohol)
b:ATP CO2 and lactate
c:ATP, NADH, and pyruvate
d:ATP, pyruvate, and oxygen

Answer 10

atp, co2 and ethanol (ethyl alcohol)