Homework 7 Flashcards
In glycolysis ___ moles of ATP and ___ moles of NADH are produced per one mole of glucose consumption.
1, 2
1, 1
2, 1
2, 10
2, 2
2, 2
How many enzymes of glycolysis are control points for the pathway?
1
2
3
4
All the enzymes serve as control points.
3
In glycolysis, ATP is generated by ___________.
oxidative phosphorylation
substrate level phosphorylation
photophosphorylation
autophosphorylation of ADP
none of the above
substrate level phosphorylation
Which of the following is FALSE for catabolic pathways?
They generate ATP.
They generate oxidized enzyme cofactors.
They are oxidative.
They extract usable chemical energy from fuel molecules.
They generate oxidized enzyme cofactors.
The first reaction in gluconeogenesis is ___________.
an oxidative decarboxylation
a redox reaction
a carboxylation
a phosphate transfer
a carboxylation
When the energetic level (glucose) of the cell low glycolysis is ___________ and when plasma glucose level is low gluconeogenesis is ___________.
activated; inhibited
activated; activated
inhibited; activated
inhibited; inhibited
none of the above
activated; activated
The reactions of glycolysis that are bypassed in gluconeogenesis are catalyzed by the enzymes ___________.
pyruvate carboxylase, aldolase, and phosphofructokinase
hexokinase, phosphofructokinase, and pyruvate kinase
glucose-6-kinase, aldolase and enolase
glucose-6-phosphatase, fructose-1,6-bisphosphatase, pyruvate carboxylase, and phosphoenolpyruvate carboxylase
glucose-6-phosphatase, fructose-1,6-bisphosphatase, pyruvate carboxylase, and phosphoenolpyruvate carboxylase
Pyruvate dehydrogenase, the enzyme that catalyzes the conversion of pyruvate to acetyl-CoA, is a multi-subunit enzyme that requires which of the following vitamins and cofactors?
ferredoxin, thiamine, niacin, FMN
thiamine pyrophosphate, lipoamide, nicotine adenine dinucleotide
lipoic acid, thiamine, ferredoxin, vitamin D
thiamine, ascorbic acid, niacin, pantothenic acid
thiamine pyrophosphate, lipoamide, nicotine adenine dinucleotide
Match the following showing reaction products of pyruvate:
a) Decarboxylation by pyruvate decarboxylase
b) Carboxylation
c) Transamination
d) Reduction
e) Decarboxylation by pyruvate dehydrogenase
a) Acetaldehyde
b) Oxaloacetate
c) Alanine
d) Lactate
e) Acetyl-CoA
Which of the following statements regarding gluconeogenesis is TRUE?
It is likely to occur when cellular ATP levels are high.
It occurs actively in skeletal muscle during periods of exercise.
The conversion of phosphoenolpyruvate to 2-phosphoglycerate occurs in two steps.
Fructose-2,6-bisphosphate activates gluconeogenesis.
Gluconeogenesis is reciprocally regulated with glycogen synthesis.
It is likely to occur when cellular ATP levels are high.
