Question 1

Which of the following vitamins are precursors to coenzymes that are necessary for the formation of acetyl CoA from pyruvate?

Accepted Answer

A)  thiamine, riboflavin, niacin, lipoic acid, and pantothenic acid 
B)  thiamine, riboflavin, niacin, lipoic acid, pantothenic acid, and biotin 
C)  thiamine, riboflavin, niacin, and biotin 
D)  thiamine, riboflavin, and lipoic acid 
E)  None of the above. 
A)  thiamine, riboflavin, niacin, lipoic acid, and pantothenic acid 
B)  thiamine, riboflavin, niacin, lipoic acid, pantothenic acid, and biotin 
C)  thiamine, riboflavin, niacin, and biotin 
D)  thiamine, riboflavin, and lipoic acid 
E)  None of the above.

Question 2

Choose the correct answer from the list below. Not all of the answers will be used.
-________________: Arsenite inhibits the function of this component of the PDH.

Accepted Answer

A) scurvy 
B) phosphorylation 
C) beriberi 
D) mitochondria 
E) acetyl CoA
F)E3
G)thiamine pyrophosphate
H)lipoamide
I)pyruvate dehydrogenase
J)coenzyme A
K)E1
L)glyoxylate cycle 
A) scurvy 
B) phosphorylation 
C) beriberi 
D) mitochondria 
E) acetyl CoA
F)E3
G)thiamine pyrophosphate
H)lipoamide
I)pyruvate dehydrogenase
J)coenzyme A
K)E1
L)glyoxylate cycle

Question 3

Choose the correct answer from the list below. Not all of the answers will be used.
-In the presence of oxygen, pyruvate is converted to ________________.

Accepted Answer

A) scurvy 
B) phosphorylation 
C) beriberi 
D) mitochondria 
E) acetyl CoA
F)E3
G)thiamine pyrophosphate
H)lipoamide
I)pyruvate dehydrogenase
J)coenzyme A
K)E1
L)glyoxylate cycle 
A) scurvy 
B) phosphorylation 
C) beriberi 
D) mitochondria 
E) acetyl CoA
F)E3
G)thiamine pyrophosphate
H)lipoamide
I)pyruvate dehydrogenase
J)coenzyme A
K)E1
L)glyoxylate cycle

Question 4

Pyruvate is decarboxylated by which subunit of the PDH?

Accepted Answer

A)  E1 
B)  E2 
C)  E3 
D)  E4 
E)  E5 
A)  E1 
B)  E2 
C)  E3 
D)  E4 
E)  E5

Question 5

Pyruvate dehydrogenase is _______________ when ATP-ADP ratios are high.

Accepted Answer

A)  activated 
B)  inhibited 
C)  phosphorylated 
D)  B and C 
E)  A and C 
A)  activated 
B)  inhibited 
C)  phosphorylated 
D)  B and C 
E)  A and C

Exam 18: Preparation for the Cycle

Which of the following vitamins are precursors to coenzymes that are necessary for the formation of acetyl CoA from pyruvate?

Choose the correct answer from the list below. Not all of the answers will be used. -________________: Arsenite inhibits the function of this component of the PDH.

Choose the correct answer from the list below. Not all of the answers will be used. -In the presence of oxygen, pyruvate is converted to ________________.

Pyruvate is decarboxylated by which subunit of the PDH?

Pyruvate dehydrogenase is _______________ when ATP-ADP ratios are high.

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

Harvesting Electrons From the Cycle

The Electron Transport Chain

The Proton-Motive Force

The Light Reactions

The Calvin Cycle

Glycogen Degradation

Glycogen Synthesis

The Pentose Phosphate Pathway

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