Question 1

An intramolecular phosphoryl-group transfer occurs when

Accepted Answer

A) 2-phosphoglycerate is converted to phosphoenolpyruvate. 
B) 1,3-bisphosphoglycerate is converted to 3-phosphoglycerate. 
C) Both A and B. 
D) None of the above. 
A) 2-phosphoglycerate is converted to phosphoenolpyruvate. 
B) 1,3-bisphosphoglycerate is converted to 3-phosphoglycerate. 
C) Both A and B. 
D) None of the above.

Question 2

The slowing of glycolysis in the presence of oxygen is called the ________ effect.

Accepted Answer

A) Bohr 
B) Michaelis-Menton 
C) Pasteur 
D) Pauling 
A) Bohr 
B) Michaelis-Menton 
C) Pasteur 
D) Pauling

Question 3

The reaction catalyzed by PFK-1 is metabolically reversible.

Accepted Answer

A) True 
 B)False

Question 4

Which is not part of the Entner-Doudoroff pathway?

Accepted Answer

A) Consumption of ATP. 
B) The enzyme gluconolactonase. 
C) An unusual dehydrase reaction from 6-phosphogluconate to KDPG. 
D) The production of pyruvate. 
E) The production of NADPH. 
A) Consumption of ATP. 
B) The enzyme gluconolactonase. 
C) An unusual dehydrase reaction from 6-phosphogluconate to KDPG. 
D) The production of pyruvate. 
E) The production of NADPH.

Question 5

Which of the following is not a metabolically irreversible enzymatic reaction of glycolysis?

Accepted Answer

A) Pyruvate kinase reaction. 
B) PFK-1 reaction. 
C) Hexokinase/Glucokinase reaction. 
D) None of the above. 
A) Pyruvate kinase reaction. 
B) PFK-1 reaction. 
C) Hexokinase/Glucokinase reaction. 
D) None of the above.

Question 6

In strenuously working muscle the pH decreases.This inhibits the activity of PFK-1 and glycolysis slows.Why would it be desirable to slow glycolysis when the demand for ATP is high?

Accepted Answer

A) Inhibition of PFK-1 allows for the complete oxidation of pyruvate via the citric acid cycle. 
B) Slowing glycolysis slows the rate of decrease in pH.A low pH can be harmful and potentially fatal. 
C) The less active form of PFK-1 is a potent allosteric activator of creatine,so even though glycolysis is slowed,ATP production is actually increased by the activation of creatine. 
D) As PFK-1 is inhibited,its isozyme,PFK-2 is activated.PFK-2 is functional at a much lower pH than PFK-1. 
A) Inhibition of PFK-1 allows for the complete oxidation of pyruvate via the citric acid cycle. 
B) Slowing glycolysis slows the rate of decrease in pH.A low pH can be harmful and potentially fatal. 
C) The less active form of PFK-1 is a potent allosteric activator of creatine,so even though glycolysis is slowed,ATP production is actually increased by the activation of creatine. 
D) As PFK-1 is inhibited,its isozyme,PFK-2 is activated.PFK-2 is functional at a much lower pH than PFK-1.

Question 7

Pyruvate can be converted to the amino acid ________ in all species.

Accepted Answer

A) lysine 
B) glycine 
C) alanine 
D) all of the above 
A) lysine 
B) glycine 
C) alanine 
D) all of the above

Question 8

Glucose is normally transported into cells by an active transport protein since the concentration of glucose inside cells is normally higher than that in the blood.

Accepted Answer

A) True 
 B)False

An intramolecular phosphoryl-group transfer occurs when

The slowing of glycolysis in the presence of oxygen is called the ________ effect.

The reaction catalyzed by PFK-1 is metabolically reversible.

Which is not part of the Entner-Doudoroff pathway?

Which of the following is not a metabolically irreversible enzymatic reaction of glycolysis?

In strenuously working muscle the pH decreases.This inhibits the activity of PFK-1 and glycolysis slows.Why would it be desirable to slow glycolysis when the demand for ATP is high?

Pyruvate can be converted to the amino acid ________ in all species.

Glucose is normally transported into cells by an active transport protein since the concentration of glucose inside cells is normally higher than that in the blood.

Introduction to Biochemistry

Water

Amino Acids and the Primary Structures of Proteins

Proteins: Three-Dimensional Structure and Function

Properties of Enzymes

Mechanisms of Enzymes

Coenzymes and Vitamins

Carbohydrates

Lipids and Membranes

Introduction to Metabolism

Gluconeogenesis, the Pentose Phosphate Pathway, and Glycogen Metabolism

The Citric Acid Cycle

Electron Transport and Atp Synthesis

Photosynthesis

Lipid Metabolism

Amino Acid Metabolism

Nucleotide Metabolism

Nucleic Acids

DNA Replication, repair, and Recombination

Transcription and RNA Processing

Protein Synthesis

Filters

Exam 11: Glycolysis

An intramolecular phosphoryl-group transfer occurs when

The slowing of glycolysis in the presence of oxygen is called the ________ effect.

The reaction catalyzed by PFK-1 is metabolically reversible.

Which is not part of the Entner-Doudoroff pathway?

Which of the following is not a metabolically irreversible enzymatic reaction of glycolysis?

In strenuously working muscle the pH decreases.This inhibits the activity of PFK-1 and glycolysis slows.Why would it be desirable to slow glycolysis when the demand for ATP is high?

Pyruvate can be converted to the amino acid ________ in all species.

Glucose is normally transported into cells by an active transport protein since the concentration of glucose inside cells is normally higher than that in the blood.

Introduction to Biochemistry

Water

Amino Acids and the Primary Structures of Proteins

Proteins: Three-Dimensional Structure and Function

Properties of Enzymes

Mechanisms of Enzymes

Coenzymes and Vitamins

Carbohydrates

Lipids and Membranes

Introduction to Metabolism

Gluconeogenesis, the Pentose Phosphate Pathway, and Glycogen Metabolism

The Citric Acid Cycle

Electron Transport and Atp Synthesis

Photosynthesis

Lipid Metabolism

Amino Acid Metabolism

Nucleotide Metabolism

Nucleic Acids

DNA Replication, repair, and Recombination

Transcription and RNA Processing

Protein Synthesis

Filters