In a tissue that metabolizes glucose via the pentose phosphate pathway, C-1 of
glucose would be expected to end up principally in:
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carbon dioxide.
,In what order do the following five steps occur in the photochemical reaction
centers?
1) Excitation of the chlorophyll a molecule at the reaction center
2) Replacement of the electron in the reaction center chlorophyll
3) Light excitation of antenna chlorophyll molecule
4) Passage of excited electron to electron-transfer chain
5) Exiton transfer to neighboring chlorophyll
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3-5-1-4-2
Which one of the following statements about mammalian glycogen synthase is not
correct?
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This enzyme adds the initial glucose unit to a tyrosine residue in
glycogenin.
In glycolysis, fructose 1,6-bisphosphate is converted to two products with a standard
free-energy change (G'°) of 23.8 kJ/mol. Under what conditions (encountered in a
normal cell) will the free-energy change (G) be negative, enabling the reaction to
proceed to the right?
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, When there is a high concentration of fructose 1,6-bisphosphate relative to
the concentration of products.
If a person's urine contains unusually high concentrations of urea, which one of the
following diets has he or she probably been eating recently?
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Very low carbohydrate, very high protein
Which of the following reactions in glycolysis is a ketose to aldose isomerization?
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Triose phosphate isomerase
Oxaloacetate uniformly labeled with 14C (i.e., with equal amounts of 14C in each of its
carbon atoms) is condensed with unlabeled acetyl-CoA. After a single pass through
the citric acid cycle back to oxaloacetate, what fraction of the original radioactivity
will be found in the oxaloacetate?
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1/2
, Which of the following reactions in glycolysis produces ATP as a product?
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Pyruvate kinase
Under which circumstances are amino acids not metabolized via oxidative
degradation?
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Plants growing in nutrient-rich soils
The coenzyme required for all transaminations is derived from:
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pyridoxine (vitamin B6)
The oxidation of 3 mol of glucose by the pentose phosphate pathway may result in
the production of:
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3 mol of pentose, 6 mol of NADPH, and 3 mol of CO2.
glucose would be expected to end up principally in:
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carbon dioxide.
,In what order do the following five steps occur in the photochemical reaction
centers?
1) Excitation of the chlorophyll a molecule at the reaction center
2) Replacement of the electron in the reaction center chlorophyll
3) Light excitation of antenna chlorophyll molecule
4) Passage of excited electron to electron-transfer chain
5) Exiton transfer to neighboring chlorophyll
Give this one a try later!
3-5-1-4-2
Which one of the following statements about mammalian glycogen synthase is not
correct?
Give this one a try later!
This enzyme adds the initial glucose unit to a tyrosine residue in
glycogenin.
In glycolysis, fructose 1,6-bisphosphate is converted to two products with a standard
free-energy change (G'°) of 23.8 kJ/mol. Under what conditions (encountered in a
normal cell) will the free-energy change (G) be negative, enabling the reaction to
proceed to the right?
Give this one a try later!
, When there is a high concentration of fructose 1,6-bisphosphate relative to
the concentration of products.
If a person's urine contains unusually high concentrations of urea, which one of the
following diets has he or she probably been eating recently?
Give this one a try later!
Very low carbohydrate, very high protein
Which of the following reactions in glycolysis is a ketose to aldose isomerization?
Give this one a try later!
Triose phosphate isomerase
Oxaloacetate uniformly labeled with 14C (i.e., with equal amounts of 14C in each of its
carbon atoms) is condensed with unlabeled acetyl-CoA. After a single pass through
the citric acid cycle back to oxaloacetate, what fraction of the original radioactivity
will be found in the oxaloacetate?
Give this one a try later!
1/2
, Which of the following reactions in glycolysis produces ATP as a product?
Give this one a try later!
Pyruvate kinase
Under which circumstances are amino acids not metabolized via oxidative
degradation?
Give this one a try later!
Plants growing in nutrient-rich soils
The coenzyme required for all transaminations is derived from:
Give this one a try later!
pyridoxine (vitamin B6)
The oxidation of 3 mol of glucose by the pentose phosphate pathway may result in
the production of:
Give this one a try later!
3 mol of pentose, 6 mol of NADPH, and 3 mol of CO2.
