Question 1

Which biosynthetic pathway requires NADH?

Accepted Answer

A)  cholesterol 
B)  fatty acid 
C)  nucleotide 
D)  All of the above. 
E)  None of the above. 
A)  cholesterol 
B)  fatty acid 
C)  nucleotide 
D)  All of the above. 
E)  None of the above. D

Question 2

What are the reactions in the oxidative phase of the pentose phosphate pathway?

Accepted Answer

The first reaction is the oxidation of C1 of glucose 6-phosphate to 6-phosphoglucono-δ-lactone by the enzyme glucose 6-phosphate dehydrogenase. The lactone product is hydrolyzed to 6-phosphogluconate by the enzyme lactonase. Finally, 6-phosphogluconate is further oxidized and decarboxylated to ribulose 5-phosphate and CO₂ by 6-phosphogluconate dehydrogenase.

Question 3

_________________ is the committed step of the pentose phosphate pathway.

Accepted Answer

glucose 6-phosphate dehydrogenase

Question 4

What is the net reaction of the transketolase and transaldolase steps?

Accepted Answer

A) 
$3 \mathrm { C } _ { 5 } \rightleftharpoons 2 \mathrm { C } _ { 6 } + \mathrm { C } _ { 3 }$ 
B)  
$2 \mathrm { C } _ { 5 } \rightleftharpoons \mathrm { C } _ { 6 } + \mathrm { C } _ { 4 }$ 
C)  
$3 \mathrm { C } _ { 5 } \rightleftharpoons \mathrm { C } _ { 6 } + 3 \mathrm { C } _ { 3 }$ 
D)  
$2 \mathrm { C } _ { 5 } \rightleftharpoons 2 \mathrm { C } _ { 4 } + \mathrm { C } _ { 2 }$ 
E)  None of the above. 
A) 
$3 \mathrm { C } _ { 5 } \rightleftharpoons 2 \mathrm { C } _ { 6 } + \mathrm { C } _ { 3 }$ 
B)  
$2 \mathrm { C } _ { 5 } \rightleftharpoons \mathrm { C } _ { 6 } + \mathrm { C } _ { 4 }$ 
C)  
$3 \mathrm { C } _ { 5 } \rightleftharpoons \mathrm { C } _ { 6 } + 3 \mathrm { C } _ { 3 }$ 
D)  
$2 \mathrm { C } _ { 5 } \rightleftharpoons 2 \mathrm { C } _ { 4 } + \mathrm { C } _ { 2 }$ 
E)  None of the above.

Question 5

The currency of reducing power is:

Accepted Answer

A)  NADPH. 
B)  NADH. 
C)  AMP. 
D)  ADP. 
E)  None of the above. 
A)  NADPH. 
B)  NADH. 
C)  AMP. 
D)  ADP. 
E)  None of the above.

Question 6

What is a primary difference between the oxidation of glucose to CO2 by glycolysis and the citric acid cycle versus the oxidation via the pentose phosphate pathway?

Accepted Answer

Although glycolysis takes plac

Question 7

The manifestation of the disease is actually caused by a defect in _________________.

Accepted Answer

glucose 6-

Question 8

Choose the correct answer from the list below. Not all of the answers will be used.
-Two molecules of ____________ are formed in phase II of the pentose phosphate pathway.

Accepted Answer

A) nonoxidative 
B) oxidative 
C) transketolase 
D) glucose 6-phosphate 
E) reducing equivalents
F)thiamine pyrophosphate
G)transaldolase
H)glutathione reductase
I)glycolysis
J)NADH
K)fructose 6-phosphate
L)NADPH/pentose phosphate pathway
M)glucose 
A) nonoxidative 
B) oxidative 
C) transketolase 
D) glucose 6-phosphate 
E) reducing equivalents
F)thiamine pyrophosphate
G)transaldolase
H)glutathione reductase
I)glycolysis
J)NADH
K)fructose 6-phosphate
L)NADPH/pentose phosphate pathway
M)glucose

Question 9

In mode two:

Accepted Answer

A)  the needs for NADPH and ribose 5-phosphate are balanced, 
B)  much more NADPH than ribose 5-phosphate is required. 
C)  more ribose 5-phosphate than NADPH is required. 
D)  NADPH and CO2 are required. 
E)  excess NAD+is required. . 
A)  the needs for NADPH and ribose 5-phosphate are balanced, 
B)  much more NADPH than ribose 5-phosphate is required. 
C)  more ribose 5-phosphate than NADPH is required. 
D)  NADPH and CO2 are required. 
E)  excess NAD+is required. .

Question 10

Choose the correct answer from the list below. Not all of the answers will be used.
-____________ is the key source of biosynthetic reducing equivalents.

Accepted Answer

A) nonoxidative 
B) oxidative 
C) transketolase 
D) glucose 6-phosphate 
E) reducing equivalents
F)thiamine pyrophosphate
G)transaldolase
H)glutathione reductase
I)glycolysis
J)NADH
K)fructose 6-phosphate
L)NADPH/pentose phosphate pathway
M)glucose 
A) nonoxidative 
B) oxidative 
C) transketolase 
D) glucose 6-phosphate 
E) reducing equivalents
F)thiamine pyrophosphate
G)transaldolase
H)glutathione reductase
I)glycolysis
J)NADH
K)fructose 6-phosphate
L)NADPH/pentose phosphate pathway
M)glucose

Question 11

The enzyme transketolase transfers a _________________-carbon fragment from a ketose to an aldose.

Accepted Answer

The answer of The enzyme transketolase transfers a _________________-carbon fragment...

Question 12

Hemolytic anemia is caused by a deficiency of the enzyme _________________.

Accepted Answer

glucose 6-

Question 13

How can a deficiency of glucose 6-phosphate confer a physiological advantage?

Accepted Answer

The deficiency appears to be protective

Question 14

Which enzyme controls the pentose phosphate pathway?

Accepted Answer

While the overall rate of the

Question 15

NADPH is required for which of the following detoxification reactions or enzymes?

Accepted Answer

A)  cytochrome P450 monooxygenase 
B)  reduction of glutathione(ox) 
C)  deamination of serine 
D)  A and B 
E)  All of the above. 
A)  cytochrome P450 monooxygenase 
B)  reduction of glutathione(ox) 
C)  deamination of serine 
D)  A and B 
E)  All of the above.

Question 16

Which sugar(s) is/are converted into ribulose 5-phosphate by a single enzymatic step?

Accepted Answer

A)  ribose 5-phosphate 
B)  xyulose 5-phosphate 
C)  erythrose 4-phosphate 
D)  A and B 
E)  C and C 
A)  ribose 5-phosphate 
B)  xyulose 5-phosphate 
C)  erythrose 4-phosphate 
D)  A and B 
E)  C and C

Question 17

How does NADPH protect red blood cells from hemolysis?

Accepted Answer

In red blood cells, NADPH is used to red

Question 18

Choose the correct answer from the list below. Not all of the answers will be used.
-Ribulose 5-phosphate is the result of the ____________ phase.

Accepted Answer

A) nonoxidative 
B) oxidative 
C) transketolase 
D) glucose 6-phosphate 
E) reducing equivalents
F)thiamine pyrophosphate
G)transaldolase
H)glutathione reductase
I)glycolysis
J)NADH
K)fructose 6-phosphate
L)NADPH/pentose phosphate pathway
M)glucose 
A) nonoxidative 
B) oxidative 
C) transketolase 
D) glucose 6-phosphate 
E) reducing equivalents
F)thiamine pyrophosphate
G)transaldolase
H)glutathione reductase
I)glycolysis
J)NADH
K)fructose 6-phosphate
L)NADPH/pentose phosphate pathway
M)glucose

Question 19

NADPH is required by the liver and adipose for synthesis of _________________.

Accepted Answer

The answer of NADPH is required by the liver and...

Question 20

Choose the correct answer from the list below. Not all of the answers will be used.
-The prosthetic group ____________ is tightly bound to the enzyme transketolase.

Accepted Answer

A) nonoxidative 
B) oxidative 
C) transketolase 
D) glucose 6-phosphate 
E) reducing equivalents
F)thiamine pyrophosphate
G)transaldolase
H)glutathione reductase
I)glycolysis
J)NADH
K)fructose 6-phosphate
L)NADPH/pentose phosphate pathway
M)glucose 
A) nonoxidative 
B) oxidative 
C) transketolase 
D) glucose 6-phosphate 
E) reducing equivalents
F)thiamine pyrophosphate
G)transaldolase
H)glutathione reductase
I)glycolysis
J)NADH
K)fructose 6-phosphate
L)NADPH/pentose phosphate pathway
M)glucose

Exam 26: The Pentose Phosphate Pathway

Which biosynthetic pathway requires NADH?

What are the reactions in the oxidative phase of the pentose phosphate pathway?

_________________ is the committed step of the pentose phosphate pathway.

What is the net reaction of the transketolase and transaldolase steps?

The currency of reducing power is:

What is a primary difference between the oxidation of glucose to CO2 by glycolysis and the citric acid cycle versus the oxidation via the pentose phosphate pathway?

The manifestation of the disease is actually caused by a defect in _________________.

Choose the correct answer from the list below. Not all of the answers will be used. -Two molecules of ____________ are formed in phase II of the pentose phosphate pathway.

In mode two:

Choose the correct answer from the list below. Not all of the answers will be used. -____________ is the key source of biosynthetic reducing equivalents.

The enzyme transketolase transfers a _________________-carbon fragment from a ketose to an aldose.

Hemolytic anemia is caused by a deficiency of the enzyme _________________.

How can a deficiency of glucose 6-phosphate confer a physiological advantage?

Which enzyme controls the pentose phosphate pathway?

NADPH is required for which of the following detoxification reactions or enzymes?

Which sugar(s) is/are converted into ribulose 5-phosphate by a single enzymatic step?

How does NADPH protect red blood cells from hemolysis?

Choose the correct answer from the list below. Not all of the answers will be used. -Ribulose 5-phosphate is the result of the ____________ phase.

NADPH is required by the liver and adipose for synthesis of _________________.

Choose the correct answer from the list below. Not all of the answers will be used. -The prosthetic group ____________ is tightly bound to the enzyme transketolase.

Biochemistry and the Unity of Life

Water, Weak Bonds, and the Generation of Order Out of Chaos

Amino Acids

Protein Three-Dimensional Structure

Techniques in Protein Biochemistry

Basic Concepts of Enzyme Action

Kinetics and Regulation

Mechanisms and Inhibitors

Hemoglobin: an Allosteric Protein

Carbohydrates

Lipids

Membrane Structure and Function

Signal Transduction Pathways

Digestion: Turning a Meal Into Cellular Biochemicals

Metabolism: Basic Concepts and Design

Glycolysis

Gluconeogenesis

Preparation for the Cycle

Harvesting Electrons From the Cycle

The Electron Transport Chain

The Proton-Motive Force

The Light Reactions

The Calvin Cycle

Glycogen Degradation

Glycogen Synthesis

Fatty Acid Degredation

Fatty Acid Synthesis

Lipid Synthesis

Amino Acid Degradation and the Urea Cycle

Amino Acids Synthesis

Nucleotide Metabolism

The Structure of Informational Macromolecules: Dna and Rna

DNA Replication

DNA Repair and Recombination

RNA Synthesis and Regulation in Prokaryotes

Gene Expression in Eukaryotes

RNA Processing in Eukaryotes

The Genetic Code

The Mechanism of Protein Synthesis

Recombinant DNA Techniques

Filters

What is a primary difference between the oxidation of glucose to CO₂by glycolysis and the citric acid cycle versus the oxidation via the pentose phosphate pathway?