| 1. Respiration occurs in microorganisms, mostly.
in all living things.
during the day but not at
night.
at night but not during the
day.
at all times in organic
molecules.
2. With respect to the element carbon, respiration is a(n) _________
reaction.
dehydration synthesis.
digestion.
oxidation.
reduction.
Anabolic reactions.
3. Two general categories of respiration are
fermentation and
dehydration syntheses.
dehydration syntheses and
aerobic respiration.
digestion and aerobic
respiration.
fermentation and aerobic
respiration.
krebs cycle and
electron-transport chain.
4. The chains of carbon are converted to carbon dioxide and water in
glycolysis.
Krebs cycle.
aerobic respiration.
alcoholic fermentation.
photosynthesis
5. Glucose is converted to pyruvate in
glycolysis.
Krebs cycle.
aerobic respiration.
alcoholic fermentation.
the light reaction.
6. Glucose is converted to ethyl alcohol and carbon dioxide in
glycolysis.
Krebs cycle.
aerobic respiration.
alcoholic fermentation.
none of the above.
7. Three hydrogen carriers involved in aerobic respiration are
CoA, ATP, cocarboxylase.
CoA, cocarboxylase, FAD.
NAD, NADP, FAD.
NADP, cytochromes, ATP.
ADP, AMP, ATP
8. The role of oxygen in aerobic respiration is
accepting the hydrogen
removed from organic compounds.
reducing CoA.
oxidizing ATP.
producing CO2.
all of the above.
9. Respiration is important because
its waste heat helps to
warm the environment.
it conserves energy.
Enzymes require it.
it recycles energy.
it recycles oxygen.
10. It is advantageous to living things to store energy in glucose rather than in
ATP because
ATP movers more easily
from cell to cell.
glucose is more reactive
than ATP
and ATP molecule is larger
than a glucose molecule and so stores more metabolically useful energy.
all of the above..
none of the above.
11. The complete oxidation of one glucose molecule produces ___ molecules of ATP.
3
8
38
42
82
12. Dumping of organic wastes into a lake may result in anaerobic conditions in the
lake because
some microorganisms
respire the organic matter aerobically and so reduce the oxygen content of the water.
organic matter absorbs the
oxygen from the water.
the space occupied by the
organic matter reduces the volume that could be occupied by the oxygen.
organic matter results in
waste heat.
none of the above.
13. What is the net gain in ATP molecules produced during the reactions of
glycolysis under anaerobic conditions?
2
4
6
8
10
14. When a muscle cell is metabolizing glucose in the complete absence of molecular
oxygen, which one of the following substances in not produced?
heat
ATP
pyruvic acid
lactic acid
acetyl-CoA
15. Which metabolic pathway is a common pathway to both anaerobic and aerobic
metabolism?
The electron transport
chain.
The Krebs cycle.
The oxidation of pyruvic
acid.
glycolysis
none of the above.
16. Cyanide blocks the respiratory electron-transport chain. As a result
the Krebs cycle speeds
up.
electrons and hydrogens
cannot flow from NADre to oxygen.
three ATPs are produced
for every pair of electrons.
production of water
increases.
glycolysis is inhibited.
17. When glucose is broken down to carbon dioxide and water during aerobic
respiration, more than 60% of its energy is released as
oxygen.
carbon dioxide.
heat.
ATP.
NAD. |