Question 1

In the second stage of the catabolism of phenylalanine,what two compounds are produced to enter the citric acid cycle?

Accepted Answer

fumarate a

Question 2

Complete the following concerning ATP's role as the universal carrier of chemical energy: "The energy ________ from the hydrolysis of ATP converts ________ reactions into ________ reactions."

Accepted Answer

A) released,exergonic,endergonic 
B) released,endergonic,exergonic 
C) consumed,exergonic,endergonic 
D) consumed,endergonic,exergonic 
E) consumed,oxidation,reduction 
A) released,exergonic,endergonic 
B) released,endergonic,exergonic 
C) consumed,exergonic,endergonic 
D) consumed,endergonic,exergonic 
E) consumed,oxidation,reduction

Question 3

Each round of the citric acid cycle forms ________ molecule(s)of FADH2.

Accepted Answer

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

Question 4

Under normal aerobic conditions in mammalian cells,into what two compounds is the pyruvate generated in glycolysis converted?

Accepted Answer

acetyl-CoA

Question 5

Identify the third step of the citric acid cycle.

Accepted Answer

A) Citrate is converted to isocitrate. 
B) Conjugate addition of water to the double bond of fumarate forms (S)-malate. 
C) Acetyl-CoA reacts with oxaloacetate to form citrate. 
D) FAD oxidizes succinate to fumarate. 
E) The secondary alcohol of isocitrate is oxidized to a ketone by NAD+ and the ketone loses CO2. 
A) Citrate is converted to isocitrate. 
B) Conjugate addition of water to the double bond of fumarate forms (S)-malate. 
C) Acetyl-CoA reacts with oxaloacetate to form citrate. 
D) FAD oxidizes succinate to fumarate. 
E) The secondary alcohol of isocitrate is oxidized to a ketone by NAD+ and the ketone loses CO2.

Question 6

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

Accepted Answer

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

Question 7

a-Ketoglutarate is an intermediate in the citric acid cycle.Draw its structure.

Accepted Answer

The answer of a-Ketoglutarate is an intermediate in the citric...

Question 8

What explains the kinetic stability of ATP in aqueous media at biological pH?

Accepted Answer

The negative charges

Question 9

Which of the following is the allosteric inhibitor of phosphofructokinase?

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 10

Give the product for the following reaction.

Accepted Answer

A)    
B)    
C)    
D)    
E)    
A)    
B)    
C)    
D)    
E)

Question 11

At biological pH,ATP 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 12

Among those listed below,identify all the phosphoryl transfer reactions.You may choose more than one answer.

Accepted Answer

A) Nucleophile attacks the a-phosphorus. 
B) Nucleophile attacks the b-phosphorus. 
C) Nucleophile attacks the g-phosphorus. 
D) Nucleophile attacks the adenosine. 
E) Nucleophile attacks the oxygen attached to the adenosine. 
A) Nucleophile attacks the a-phosphorus. 
B) Nucleophile attacks the b-phosphorus. 
C) Nucleophile attacks the g-phosphorus. 
D) Nucleophile attacks the adenosine. 
E) Nucleophile attacks the oxygen attached to the adenosine.

Question 13

Fumarate is an intermediate in the citric acid cycle.Draw its structure.

Accepted Answer

The answer of Fumarate is an intermediate in the citric...

Question 14

Give the number of ATP molecules formed from NADH in the fourth stage of catabolism.

Accepted Answer

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

Question 15

In the citric acid cycle,FAD oxidizes succinate to ________.

Accepted Answer

The answer of In the citric acid cycle,FAD oxidizes succinate...

Question 16

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

Accepted Answer

Question 17

What class of enzyme puts a phosphoryl group on its substrate?

Accepted Answer

The answer of What class of enzyme puts a phosphoryl...

Question 18

Give the product(s)for the following reaction.

Accepted Answer

The answer of Give the product(s)for the following reaction. ...

Question 19

What chemical interactions allow certain enzymes to catalyze the hydrolysis of ATP?

Accepted Answer

The negative charge on ATP is reduced by

Question 20

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

Accepted Answer

fatty acid

Exam 24: The Organic Chemistry of the Metabolic Pathways

In the second stage of the catabolism of phenylalanine,what two compounds are produced to enter the citric acid cycle?

Complete the following concerning ATP's role as the universal carrier of chemical energy: "The energy ________ from the hydrolysis of ATP converts ________ reactions into ________ reactions."

Each round of the citric acid cycle forms ________ molecule(s)of FADH2.

Under normal aerobic conditions in mammalian cells,into what two compounds is the pyruvate generated in glycolysis converted?

Identify the third step of the citric acid cycle.

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

a-Ketoglutarate is an intermediate in the citric acid cycle.Draw its structure.

What explains the kinetic stability of ATP in aqueous media at biological pH?

Which of the following is the allosteric inhibitor of phosphofructokinase?

Give the product for the following reaction.

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

Among those listed below,identify all the phosphoryl transfer reactions.You may choose more than one answer.

Fumarate is an intermediate in the citric acid cycle.Draw its structure.

Give the number of ATP molecules formed from NADH in the fourth stage of catabolism.

In the citric acid cycle,FAD oxidizes succinate to ________.

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

What class of enzyme puts a phosphoryl group on its substrate?

Give the product(s)for the following reaction.

What chemical interactions allow certain enzymes to catalyze the hydrolysis of ATP?

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

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

Complete the following concerning ATP's role as the universal carrier of chemical energy: "The energy from the hydrolysis of ATP converts reactions into reactions."

Each round of the citric acid cycle forms ________ molecule(s)of FADH₂.

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

In the first stage of catabolism,fats are hydrolyzed to and .