Question 1

Give the number of carbon dioxide molecules formed from each molecule of acetyl-CoA in the citric acid cycle.

Accepted Answer

A) one 
B) two 
C) three 
D) four 
E) none 
A) one 
B) two 
C) three 
D) four 
E) none

Question 2

________ is the only non-citric acid cycle intermediate that can enter the cycle.

Accepted Answer

A) Vitamin A 
B) Acetyl-CoA 
C) Thiamine 
D) Tyrosine 
E) Glycerol 
A) Vitamin A 
B) Acetyl-CoA 
C) Thiamine 
D) Tyrosine 
E) Glycerol

Question 3

At biological pH,ADP has ________ negative charges per molecule.

Accepted Answer

A) 4)0 
B) 3)3 
C) 2)8 
D) 1)1 
E) 0)6 
A) 4)0 
B) 3)3 
C) 2)8 
D) 1)1 
E) 0)6

Question 4

Which of the following is the feedback inhibitor of hexokinase?

Accepted Answer

A) AMP 
B) ADP 
C) Glucose-6-phosphate 
D) NADH 
E) ATP 
A) AMP 
B) ADP 
C) Glucose-6-phosphate 
D) NADH 
E) ATP

Question 5

Under anaerobic conditions,what compound in mammalian cells is used to oxidize NADH back to NAD+ so that glycolysis can continue?

Accepted Answer

Question 6

Each round of the citric acid cycle forms ________ molecule(s)of NADH.

Accepted Answer

A) 3 
B) 0 
C) 1 
D) 2 
E) 4 
A) 3 
B) 0 
C) 1 
D) 2 
E) 4

Question 7

In the citric acid cycle,the acetyl group of each molecule of acetyl-CoA is converted into two molecules of

Accepted Answer

A) carbon dioxide 
B) oxygen 
C) acetone 
D) acetaldehyde 
E) ethanol 
A) carbon dioxide 
B) oxygen 
C) acetone 
D) acetaldehyde 
E) ethanol

Question 8

What compounds are formed when a carboxylate is phosphorylated by the attack at the g-phosphorus of ATP?

Accepted Answer

an acyl ph

Question 9

How many molecules of ATP are formed by the citric acid cycle from one molecule of acetyl-CoA?

Accepted Answer

The answer of How many molecules of ATP are formed...

Question 10

Acetyl-CoA enters the citric acid cycle by reacting with ________ to form ________.

Accepted Answer

oxaloaceta

Question 11

A phosphoanhydride bond is known as a ________ bond.

Accepted Answer

A) low-energy 
B) high-energy 
C) hydrogen 
D) disulfide 
E) pericyclic 
A) low-energy 
B) high-energy 
C) hydrogen 
D) disulfide 
E) pericyclic

Question 12

Draw the chair form of the compound that results when D-glucopyranose reacts with ATP in the presence of an enzyme that catalyzes the phosphorylation of the 6-OH group.

Accepted Answer

The answer of Draw the chair form of the compound...

Question 13

In glycolysis,what type of reaction converts the 6-carbon intermediate into two 3-carbon intermediates?

Accepted Answer

A) reverse aldol condensation 
B) reverse Claisen condensation 
C) a reverse Michael addition 
D) a reverse Diels Alder reaction 
E) a transesterification reaction 
A) reverse aldol condensation 
B) reverse Claisen condensation 
C) a reverse Michael addition 
D) a reverse Diels Alder reaction 
E) a transesterification reaction

Question 14

Of the following compounds,which are generated in any step of the glycolytic conversion of glucose to pyruvate: ATP,ADP,NAD+,NADH,FAD,FADH2,acetyl-CoA.

Accepted Answer

Question 15

In the second stage of catabolism,compounds are converted into molecules that can directly enter

Accepted Answer

A) the pyruvate dehydrogenase system. 
B) the citric acid cycle. 
C) glycolysis. 
D) the tyrosine aminotransferase pathway. 
E) the oxidative phosphorylation pathway. 
A) the pyruvate dehydrogenase system. 
B) the citric acid cycle. 
C) glycolysis. 
D) the tyrosine aminotransferase pathway. 
E) the oxidative phosphorylation pathway.

Question 16

Give the product(s)for the following reaction.

Accepted Answer

A)    
B) CH3CH2CH2OH 
C) CH3CH2OH 
D)    
E)    
A)    
B) CH3CH2CH2OH 
C) CH3CH2OH 
D)    
E)

Question 17

What is gluconeogenesis?

Accepted Answer

It is an anabolic pa

Question 18

In the first stage of catabolism,proteins are hydrolyzed to ________.

Accepted Answer

The answer of In the first stage of catabolism,proteins are...

Question 19

What three factors contribute to the greater stability of ADP and phosphate compared to ATP?

Accepted Answer

1.Greater electrostatic repuls

Question 20

During the first stage of catabolism,carbohydrates are converted to glucose molecules through an enzyme-catalyzed

Accepted Answer

A) oxidation reaction. 
B) reduction reaction. 
C) isomerization reaction. 
D) acyl group transfer reaction. 
E) hydrolysis reaction. 
A) oxidation reaction. 
B) reduction reaction. 
C) isomerization reaction. 
D) acyl group transfer reaction. 
E) hydrolysis reaction.

Exam 24: The Organic Chemistry of the Metabolic Pathways

Give the number of carbon dioxide molecules formed from each molecule of acetyl-CoA in the citric acid cycle.

________ is the only non-citric acid cycle intermediate that can enter the cycle.

At biological pH,ADP has ________ negative charges per molecule.

Which of the following is the feedback inhibitor of hexokinase?

Under anaerobic conditions,what compound in mammalian cells is used to oxidize NADH back to NAD+ so that glycolysis can continue?

Each round of the citric acid cycle forms ________ molecule(s)of NADH.

In the citric acid cycle,the acetyl group of each molecule of acetyl-CoA is converted into two molecules of

What compounds are formed when a carboxylate is phosphorylated by the attack at the g-phosphorus of ATP?

How many molecules of ATP are formed by the citric acid cycle from one molecule of acetyl-CoA?

Acetyl-CoA enters the citric acid cycle by reacting with ________ to form ________.

A phosphoanhydride bond is known as a ________ bond.

Draw the chair form of the compound that results when D-glucopyranose reacts with ATP in the presence of an enzyme that catalyzes the phosphorylation of the 6-OH group.

In glycolysis,what type of reaction converts the 6-carbon intermediate into two 3-carbon intermediates?

Of the following compounds,which are generated in any step of the glycolytic conversion of glucose to pyruvate: ATP,ADP,NAD+,NADH,FAD,FADH2,acetyl-CoA.

In the second stage of catabolism,compounds are converted into molecules that can directly enter

Give the product(s)for the following reaction.

What is gluconeogenesis?

In the first stage of catabolism,proteins are hydrolyzed to ________.

What three factors contribute to the greater stability of ADP and phosphate compared to ATP?

During the first stage of catabolism,carbohydrates are converted to glucose molecules through an enzyme-catalyzed

Remembering General Chemistry: Electronic Structure and Bonding

Acids and Bases: Central to Understanding Organic Chemistry

An Introduction to Organic Compounds: Nomenclature, physical Properties, and Structure

Isomers: the Arrangement of Atoms in Space

Alkenes: Structure,nomenclature,and an Introduction to Reactivity - Thermodynamics and Kinetics

The Reactions of Alkenes - the Stereochemistry of Addition Reactions

The Reactions of Alkynes - Introduction to Multistep Synthesis

Delocalized Electrons: Their Effect on Stability, pka, and the Products of a Reaction - Aromaticity and Electronic Effects: an Introduction to the Reactions of Benzene

Substitution and Elimination Reactions of Alkyl Halides

Reactions of Alcohols, ethers, epoxides, amines and Sulfur-Containing Compounds

Organometallic Compounds

Radicals

Mass Spectrometry,infrared Spectroscopy,and Uvvis Spectroscopy

Nmr Spectroscopy

Reactions of Carboxylic Acids and Carboxylic Acid Derivatives

Reactions of Aldehydes and Ketones

Reactions at the Α-Carbon

Reactions of Benzene and Substituted Benzenes

More About Amines - Reactions of Heterocylic Compounds

The Organic Chemistry of Carbohydrates

Amino Acids,peptides,and Proteins

Catalysis in Organic Reactions and in Enzymatic Reactions

The Organic Chemistry of the Coenzymes, compounds Derived From Vitamins

The Organic Chemistry of Lipids

The Chemistry of the Nucleic Acids

Synthetic Polymers

Pericyclic Reactions

Filters

Under anaerobic conditions,what compound in mammalian cells is used to oxidize NADH back to NAD⁺ so that glycolysis can continue?

Acetyl-CoA enters the citric acid cycle by reacting with to form .

Of the following compounds,which are generated in any step of the glycolytic conversion of glucose to pyruvate: ATP,ADP,NAD⁺,NADH,FAD,FADH₂,acetyl-CoA.