Bk3 Ch22 Sug Ans E

Topics: Adenosine triphosphate, Cellular respiration, Metabolism Pages: 4 (806 words) Published: December 3, 2014
Suggested answers to Exercise and Reading to learn
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 Chapter 22Respiration
Exercise
Multiple-choice questions (p. 22-29)
1C
2D
3C
4A
5D
6A
7D
8D
9B
10A
11D
12A

Short questions (p. 22-31)
13aTrue1m
bFalse; some energy is released as heat and some is stored in ATP.1m
cTrue1m
dFalse; glucose is only partly broken down to lactic acid or ethanol.1m
eFalse; ATP temporarily stores energy in the form of chemical energy.1m

14aTwo1m
bAny two from:1m x 2
ATP can be used in many different cellular activities.
ATP can be readily broken down into ADP to supply stored energy to the cells. Large amount of energy released from respiration of glucose can be packaged into smaller amount in each ATP molecule. cAfter glycolysis, pyruvate is reduced to ethanol. NAD is regenerated by oxidation of NADH.1m

15a1 and 31m
bSome energy is lost as heat.1m
ciBetween glucose and triose phosphate1m
iiBetween triose phosphate and pyruvate1m

16aiX — carbon dioxide1m
iiA — glycolysis
B — Krebs cycle1m
bHydrogen is accepted by NAD / FAD to form NADH / FADH.1m
Hydrogen passes through a series of carriers in the inner membrane of mitochondria 1m
and is finally accepted by oxygen to form water.1m
Energy is released for synthesis of ATP.1m
cATP is broken down into ADP and phosphate group to release energy.1m

17aX — pyruvate1m
bKrebs cycle1m
cATP is formed as hydrogen passes along a series of hydrogen carriers.1m
Oxygen accepts hydrogen from a series of hydrogen carriers.1m
Hydrogen cannot pass along if there is no oxygen to accept it.1m

Structured questions (p. 22-32)
18aX — mitochondrial matrix
Y — inner membrane1m
bCoenzyme A /...
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