問題一覧
1
The primary site within the human body where carbohydrate digestion occurs is the
small intestine
2
What is the first site within the human body where breaking of polysaccharide glycosidic bonds occurs?
mouth
3
What effect does gastric juice in the stomach have on dietary polysaccharides?
has no effect on polysaccharides
4
The enzymes that convert disaccharides to monosaccharides are associated with
intestinal mucosal cells
5
Which of the following substances is needed for monosaccharides to enter the bloodstream?
ATP
6
Which of the following statements concerning glycolysis is correct?
Molecular O2 is not needed for the process to occur.
7
The overall process of glycolysis converts a C6 molecule into
two C3 molecules
8
What are the total number of steps in the C6 and C3 stages of glycolysis, respectively?
4 an 6
9
The first two intermediates in the process of glycolysis are, respectively
glucose 6-phosphate and fructose 6-phosphate
10
Pyruvate, the end product of glycolysis, is a
three-carbon keto acid
11
When one glucose molecule is processed through the glycolysis pathway, relative to ATP production/consumption, there is a
net gain of two ATP
12
In what two steps of glycolysis is ATP converted to ADP?
Steps 1 and 3
13
In the human body, under oxygen-rich and oxygen-poor conditions, respectively, pyruvate is converted to
acetyl CoA and lactate
14
In which of the following conversions is CO2 produced?
pyruvate to acetyl CoA
15
The major purpose of lactate fermentation is the production of
NAD+
16
Which of the following processes involves the conversion of a C3 molecule to another C3 molecule?
lactate fermentation
17
Accumulation of which of the following substances in muscle cells is the cause of stiffness and soreness after vigorous exercise?
lactate
18
For the complete oxidation of a glucose molecule, the majority of the ATP produced comes from which of the following phases in the oxidation process?
electron transport chain
19
The net yield of ATP for the complete oxidation of one molecule of glucose is
30 ATP
20
The net yield of ATP per glucose molecule in the process of glycolysis is
no correct response
21
The process by which glucose is converted to glycogen is called
glycogenesis
22
The intermediate glucose 1-phosphate is encountered in
both glycogenesis and glycogenolysis
23
Adding a glucose unit to a growing glycogen chain
requires the investment of the equivalent of 2 ATP molecules
24
When gluconeogenesis and glycolysis are compared in terms of reaction steps
gluconeogenesis has one more step
25
Which of the following intermediates is involved in gluconeogenesis but not in gycolysis
oxaloacetate
26
In the process of gluconeogenesis, which of the following is a reactant in the first step?
CO2
27
Which of the following statements about ATP equivalents in gluconeogenesis is correct?
6 ATP equivalents are expended
28
Which of the following substances are participants in the reactions encompassed by the Cori cycle?
pyruvate and lactate
29
Which of the following statements concerning metabolic processes that involve glucose is correct?
Glycogen is the final product in glycogenesis.
30
Which of the following pairs of processes are the reverse of each other in terms of initial reactant and final product?
glycolysis and gluconeogenesis
31
A major purpose of the first stage of the pentose phosphate pathway is the production of
NADPH
32
A major purpose of the second stage of the pentose phosphate pathway is the production of
ribose 5-phosphate
33
The pentose phosphate pathway when run to its completion produces
two glycolysis intermediates
34
Which of the following hormones promotes the uptake and use of glucose by cells?
insulin
35
Which of the following pairs of hormones increases blood-glucose levels?
glucagon and epinephrine
36
How many different B vitamins participate in the reactions involved in carbohydrate metabolism?
6
37
Which of the following B-vitamin-containing coenzymes is not used in the reactions associated with carbohydrate metabolism?
no correct response
38
Which of the following B-vitamin-containing coenzymes is needed in the conversion of pyruvate to acetyl CoA?
TPP