Question 1

How does citrate influence glycolysis?

Accepted Answer

Phosphofructokinase is inhibited by citr

Question 2

Which of the following is an allosteric inhibitor of gluconeogenesis?

Accepted Answer

A)  NADH 
B)  ATP 
C)  AMP 
D)  fructose 6-phosphate 
E)  phosphoenolpyruvate 
A)  NADH 
B)  ATP 
C)  AMP 
D)  fructose 6-phosphate 
E)  phosphoenolpyruvate

Question 3

What type of organism cannot survive in the presence of oxygen?

Accepted Answer

A)  obligate anaerobes 
B)  facultative anaerobes 
C)  obligate aerobes 
D)  facultative aerobes 
E)  None of the answers is correct. 
A)  obligate anaerobes 
B)  facultative anaerobes 
C)  obligate aerobes 
D)  facultative aerobes 
E)  None of the answers is correct.

Question 4

Which of the following must be regenerated for glycolysis to proceed?

Accepted Answer

A)  pyruvate 
B)  ATP 
C)  NAD+ 
D)  UDP-glucose 
E)  All of the answers are correct. 
A)  pyruvate 
B)  ATP 
C)  NAD+ 
D)  UDP-glucose 
E)  All of the answers are correct.

Question 5

Both hexokinase and glucokinase phosphorylate glucose. The function of glucokinase is to phosphorylate glucose in liver cells as a means to regulate blood-sugar levels. Would you expect its KM to be higher or lower than hexokinase? Explain your answer.

Accepted Answer

Glucokinase must be responsive to elevat

Question 6

Pancreatic ______________ is the digestive enzyme primarily responsible for the hydrolysis of dietary plant starch.

Accepted Answer

The answer of Pancreatic ______________ is the digestive enzyme primarily...

Question 7

The first step in gluconeogenesis is the ___________________ of pyruvate to form oxaloacetate.

Accepted Answer

The answer of The first step in gluconeogenesis is the...

Question 8

A potent allosteric activator of liver phosphofructokinase is _____________________, which is produced from fructose-6-phosphate by PFK2.

Accepted Answer

fructose-2

Question 9

What nutrient is required for the carboxylation of pyruvate in humans?

Accepted Answer

A)  biotin 
B)  thiamine 
C)  riboflavin 
D)  niacin 
E)  folic acid 
A)  biotin 
B)  thiamine 
C)  riboflavin 
D)  niacin 
E)  folic acid

Question 10

What is substrate level phosphorylation?

Accepted Answer

A)  phosphorylation of AMP by ATP 
B)  ATP synthesis when the phosphate donor is a substrate with high phosphoryl transfer potential 
C)  phosphorylation of glycolytic intermediates 
D)  phosphorylation of ATP coupled to an ion gradient 
E)  ATP and AMP synthesis from two molecules of ADP 
A)  phosphorylation of AMP by ATP 
B)  ATP synthesis when the phosphate donor is a substrate with high phosphoryl transfer potential 
C)  phosphorylation of glycolytic intermediates 
D)  phosphorylation of ATP coupled to an ion gradient 
E)  ATP and AMP synthesis from two molecules of ADP

Question 11

Why do muscles need to generate ATP under aerobic and anaerobic conditions?

Accepted Answer

Muscles initially function aerobically.

Exam 16: Glycolysis and Gluconeogenesis

How does citrate influence glycolysis?

Which of the following is an allosteric inhibitor of gluconeogenesis?

What type of organism cannot survive in the presence of oxygen?

Which of the following must be regenerated for glycolysis to proceed?

Both hexokinase and glucokinase phosphorylate glucose. The function of glucokinase is to phosphorylate glucose in liver cells as a means to regulate blood-sugar levels. Would you expect its KM to be higher or lower than hexokinase? Explain your answer.

Pancreatic ______________ is the digestive enzyme primarily responsible for the hydrolysis of dietary plant starch.

The first step in gluconeogenesis is the ___________________ of pyruvate to form oxaloacetate.

A potent allosteric activator of liver phosphofructokinase is _____________________, which is produced from fructose-6-phosphate by PFK2.

What nutrient is required for the carboxylation of pyruvate in humans?

What is substrate level phosphorylation?

Why do muscles need to generate ATP under aerobic and anaerobic conditions?

Biochemistry: an Evolving Science

Protein Composition and Structure

Exploring Proteins and Proteomes

DNA, RNA, and the Flow of Genetic Information

Exploring Genes and Genomes

Exploring Evolution and Bioinformatics

Hemoglobin: a Portrait of a Protein in Action

Enzymes: Basic Concepts and Kinetics

Oxidative Phosphorylation

Catalytic Strategies

Regulatory Strategies

Carbohydrates

Lipids and Cell Membranes

Membrane Channels and Pumps

Signal-Transduction Pathways

Metabolism: Basic Concepts and Design

The Citric Acid Cycle

The Light Reactions of Photosynthesis

The Calvin Cycle and the Pentose Phosphate Pathway

Glycogen Metabolism

Fatty Acid Metabolism

Protein Turnover and Amino Acid Catabolism

The Biosynthesis of Amino Acids

Nucleotide Biosynthesis

Biosynthesis of Membrane Lipids and Steroids

The Integration of Metabolism

DNA Replication, Repair, and Recombination

Rna Synthesis and Processing

Protein Synthesis

The Control of Gene Expression in Prokaryotes

The Control of Gene Expression in Eukaryotes

Sensory Systems

The Immune System

Molecular Motors

Drug Development

Filters

Both hexokinase and glucokinase phosphorylate glucose. The function of glucokinase is to phosphorylate glucose in liver cells as a means to regulate blood-sugar levels. Would you expect its K_M to be higher or lower than hexokinase? Explain your answer.