Question 1

Give the products for the following reaction.

Accepted Answer

The answer of Give the products for the following reaction....

Question 2

Which molecule does the following general structure represent?

Accepted Answer

A) FAD 
B) FADH2 
C) NAD+ 
D) NADP+ 
E) ATP 
A) FAD 
B) FADH2 
C) NAD+ 
D) NADP+ 
E) ATP

Question 3

Which of the following is the sequence of steps followed by biotin-dependent enzymes,as listed below? I.Transfer of the carboxyl group from carboxybiotin to the substrate
II)Activation of bicarbonate by ATP
III)Formation of carboxybiotin

Accepted Answer

A) I,II,III 
B) I,III,II 
C) II,I,III 
D) II,III,I 
E) III,II,I 
A) I,II,III 
B) I,III,II 
C) II,I,III 
D) II,III,I 
E) III,II,I

Question 4

Which of the following statements is not true of coenzymes?

Accepted Answer

A) Coenzymes catalyze chemical reactions similar to enzymes. 
B) Coenzymes may function as oxidizing and reducing agents. 
C) Coenzymes play a variety of chemical roles exactly like those played by the amino acid side chains of enzymes. 
D) Coenzymes may function as nucleophiles or strong bases needed in a reaction. 
E) Coenzymes may function as activators needed in a reaction. 
A) Coenzymes catalyze chemical reactions similar to enzymes. 
B) Coenzymes may function as oxidizing and reducing agents. 
C) Coenzymes play a variety of chemical roles exactly like those played by the amino acid side chains of enzymes. 
D) Coenzymes may function as nucleophiles or strong bases needed in a reaction. 
E) Coenzymes may function as activators needed in a reaction.

Question 5

Draw the reduced form of FAD shown below.

Accepted Answer

The answer of Draw the reduced form of FAD shown...

Question 6

Give the product for the following reaction.

Accepted Answer

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

Question 7

How does NAD+ serve as a catalyst in oxidation reactions?

Accepted Answer

A) It accepts a hydride ion at the 4-position of its pyridinium ring. 
B) It accepts a hydride ion at the amide carbonyl group at the 3-position. 
C) It accepts a proton at the 4-position of its pyridinium ring. 
D) It accepts a proton at the amide carbonyl group at the 3-position. 
E) none of the above 
A) It accepts a hydride ion at the 4-position of its pyridinium ring. 
B) It accepts a hydride ion at the amide carbonyl group at the 3-position. 
C) It accepts a proton at the 4-position of its pyridinium ring. 
D) It accepts a proton at the amide carbonyl group at the 3-position. 
E) none of the above

Question 8

Identify the compound below.

Accepted Answer

A) coenzyme A 
B) thiamine pyrophosphate 
C) pyruvate 
D) NADPH 
E) tetrahydrofolate 
A) coenzyme A 
B) thiamine pyrophosphate 
C) pyruvate 
D) NADPH 
E) tetrahydrofolate

Question 9

In a process known as oxidative phosphorylation,every NADH that is formed in carrying out oxidation reactions in the early stages of catabolism is converted into

Accepted Answer

A) three ATPs. 
B) two ATPs. 
C) four FADHs. 
D) six acetyl-CoAs. 
E) none of the above. 
A) three ATPs. 
B) two ATPs. 
C) four FADHs. 
D) six acetyl-CoAs. 
E) none of the above.

Question 10

What are holoenzymes and apoenzymes?

Accepted Answer

Holoenzymes are enzy

Question 11

Which of the following statements is true about the vitamin KH2?

Accepted Answer

A) It is the active coenzyme form of vitamin K. 
B) Vitamin K is a quinone while vitamin KH2 is a hydroquinone. 
C) Vitamin KH2 is the coenzyme for the enzyme that catalyzes the carboxylation of glutamate side chains in proteins to form Å-carboxyglutamates. 
D) A and C 
E) A,B,and C 
A) It is the active coenzyme form of vitamin K. 
B) Vitamin K is a quinone while vitamin KH2 is a hydroquinone. 
C) Vitamin KH2 is the coenzyme for the enzyme that catalyzes the carboxylation of glutamate side chains in proteins to form Å-carboxyglutamates. 
D) A and C 
E) A,B,and C

Question 12

Give the purpose of coenzyme B12 in rearrangement reactions.

Accepted Answer

Conenzyme B₁₂ catalyzes a rearra

Question 13

Which of the following is not a lipid-soluble vitamin?

Accepted Answer

A) vitamin A 
B) vitamin D 
C) vitamin E 
D) vitamin C 
E) vitamin K 
A) vitamin A 
B) vitamin D 
C) vitamin E 
D) vitamin C 
E) vitamin K

Question 14

Which molecule does the following structure represent?

Accepted Answer

A) coenzyme A 
B) thiamine 
C) pyruvate 
D) NADPH 
E) tetrahydrofolate 
A) coenzyme A 
B) thiamine 
C) pyruvate 
D) NADPH 
E) tetrahydrofolate

Question 15

Which of the following statements is not true about vitamin K?

Accepted Answer

A) The letter K comes from koagulation. 
B) Vitamin K is required for proper Ca+2 binding in blood clotting. 
C) Kitase is the active coenzyme of vitamin K. 
D) Vitamin K is synthesized by intestinal bacteria. 
E) Vitamin K is formed in leaves of green plants. 
A) The letter K comes from koagulation. 
B) Vitamin K is required for proper Ca+2 binding in blood clotting. 
C) Kitase is the active coenzyme of vitamin K. 
D) Vitamin K is synthesized by intestinal bacteria. 
E) Vitamin K is formed in leaves of green plants.

Question 16

Which of the following statements describes what cofactors are?

Accepted Answer

A) They are metal ions that assist enzymes in carrying out their catalytic reactions. 
B) They are organic molecules that assist enzymes in carrying out their catalytic reactions. 
C) They are organic molecules called coenzymes. 
D) They are organic molecules derived from compounds commonly known as vitamins. 
E) all of the above 
A) They are metal ions that assist enzymes in carrying out their catalytic reactions. 
B) They are organic molecules that assist enzymes in carrying out their catalytic reactions. 
C) They are organic molecules called coenzymes. 
D) They are organic molecules derived from compounds commonly known as vitamins. 
E) all of the above

Question 17

What are the main structural and functional differences between NAD+/NADH and NADP+/NADPH?

Accepted Answer

The only way in which NADP⁺ differs struc

Question 18

Propose a mechanism for the following coenzyme B12-dependent enzyme-catalyzed reaction.

Accepted Answer

Question 19

Give the product for the following reaction.

Accepted Answer

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

Question 20

Which of the following coenzymes is required for the enzyme catalyzed reaction shown below? Xylose-5-P + Ribose-5-P   Glyceraldehyde-3-P + Sedoheptulose-7-P

Accepted Answer

A) TPP 
B) PLC 
C) THF 
D) NADH 
E) NADPH 
A) TPP 
B) PLC 
C) THF 
D) NADH 
E) NADPH

Exam 23: The Organic Chemistry of the Coenzymes, compounds Derived From Vitamins

Give the products for the following reaction.

Which molecule does the following general structure represent?

Which of the following is the sequence of steps followed by biotin-dependent enzymes,as listed below? I.Transfer of the carboxyl group from carboxybiotin to the substrate II)Activation of bicarbonate by ATP III)Formation of carboxybiotin

Which of the following statements is not true of coenzymes?

Draw the reduced form of FAD shown below.

Give the product for the following reaction.

How does NAD+ serve as a catalyst in oxidation reactions?

Identify the compound below.

In a process known as oxidative phosphorylation,every NADH that is formed in carrying out oxidation reactions in the early stages of catabolism is converted into

What are holoenzymes and apoenzymes?

Which of the following statements is true about the vitamin KH2?

Give the purpose of coenzyme B12 in rearrangement reactions.

Which of the following is not a lipid-soluble vitamin?

Which molecule does the following structure represent?

Which of the following statements is not true about vitamin K?

Which of the following statements describes what cofactors are?

What are the main structural and functional differences between NAD+/NADH and NADP+/NADPH?

Propose a mechanism for the following coenzyme B12-dependent enzyme-catalyzed reaction.

Give the product for the following reaction.

Which of the following coenzymes is required for the enzyme catalyzed reaction shown below? Xylose-5-P + Ribose-5-P Glyceraldehyde-3-P + Sedoheptulose-7-P

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 Metabolic Pathways

The Organic Chemistry of Lipids

The Chemistry of the Nucleic Acids

Synthetic Polymers

Pericyclic Reactions

Filters

How does NAD⁺ serve as a catalyst in oxidation reactions?

Which of the following statements is true about the vitamin KH₂?

Give the purpose of coenzyme B₁₂in rearrangement reactions.

What are the main structural and functional differences between NAD⁺/NADH and NADP⁺/NADPH?

Propose a mechanism for the following coenzyme B₁₂-dependent enzyme-catalyzed reaction.