Question 1

Which of the following vitamins is needed for isomerization reactions?

Accepted Answer

A) vitamin B12 
B) riboflavin (B2) 
C) vitamin C 
D) thiamine (B1) 
E) pyridoxine (B6) 
A) vitamin B12 
B) riboflavin (B2) 
C) vitamin C 
D) thiamine (B1) 
E) pyridoxine (B6)

Question 2

Which of the following vitamins is needed for amino acid α,β-eliminations?

Accepted Answer

A) vitamin B12 
B) vitamin B2 
C) folic acid 
D) vitamin B1 
E) vitamin B6 
A) vitamin B12 
B) vitamin B2 
C) folic acid 
D) vitamin B1 
E) vitamin B6

Question 3

Generally speaking,which of the following oxidation-reduction reactions utilize NAD+ and NADP+ as oxidation coenzymes?

Accepted Answer

A) alcohols oxidized to ketones 
B) alcohols oxidized to aldehydes 
C) alcohols oxidized to carboxylic acids 
D) A and B 
E) A,B,and C 
A) alcohols oxidized to ketones 
B) alcohols oxidized to aldehydes 
C) alcohols oxidized to carboxylic acids 
D) A and B 
E) A,B,and C

Question 4

Give the purpose of thymidylate synthase.

Accepted Answer

A) converts cytosine to guanine 
B) converts guanine to cytosine 
C) converts thymine to uracil 
D) converts uracil to thymine 
E) converts adenine to guanine 
A) converts cytosine to guanine 
B) converts guanine to cytosine 
C) converts thymine to uracil 
D) converts uracil to thymine 
E) converts adenine to guanine

Question 5

Which of the following statements is true about 5-fluorouracil?

Accepted Answer

A) It is an anticancer drug. 
B) It inhibits the enzyme thymidylate synthase. 
C) It is an example of a mechanism-based inhibitor. 
D) It is an example of a suicide inhibitor. 
E) all of the above 
A) It is an anticancer drug. 
B) It inhibits the enzyme thymidylate synthase. 
C) It is an example of a mechanism-based inhibitor. 
D) It is an example of a suicide inhibitor. 
E) all of the above

Question 6

Pantothenic acid is used to form the coenzyme(s)

Accepted Answer

A) NAD+ and NADH. 
B) FAD and FADH2. 
C) TTP. 
D) CoASH. 
E) THF. 
A) NAD+ and NADH. 
B) FAD and FADH2. 
C) TTP. 
D) CoASH. 
E) THF.

Question 7

How does CoASH used in biological systems to activate carboxylic acids?

Accepted Answer

A) converts carboxylic acids into amides 
B) converts carboxyic acids into anhydrides 
C) converts carboxylic acids into acid halides 
D) converts carboxylic acids into thioesters 
E) converts carboxylic acids into esters 
A) converts carboxylic acids into amides 
B) converts carboxyic acids into anhydrides 
C) converts carboxylic acids into acid halides 
D) converts carboxylic acids into thioesters 
E) converts carboxylic acids into esters

Question 8

A deficiency of ________ results in megoblastic anemia.

Accepted Answer

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

Question 9

Which of the following vitamins are radical inhibitors or antioxidants?

Accepted Answer

A) niacin 
B) vitamins B1 and B12 
C) vitamins B2 and B6 
D) vitamins A and D 
E) vitamins C and E 
A) niacin 
B) vitamins B1 and B12 
C) vitamins B2 and B6 
D) vitamins A and D 
E) vitamins C and E

Question 10

In which of the following classes of reactions is a coenzyme required?

Accepted Answer

A) oxidation reactions 
B) two carbon transfer 
C) acyl transfer 
D) reduction reactions 
E) A,B,and D 
A) oxidation reactions 
B) two carbon transfer 
C) acyl transfer 
D) reduction reactions 
E) A,B,and D

Question 11

Give the product for the following reaction.

Accepted Answer

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

Question 12

Which of the following vitamins is the only water-soluble vitamin that does not function as a coenzyme?

Accepted Answer

A) vitamin B12 
B) riboflavin (B2) 
C) vitamin C 
D) thiamine (B1) 
E) pyridoxine (B6) 
A) vitamin B12 
B) riboflavin (B2) 
C) vitamin C 
D) thiamine (B1) 
E) pyridoxine (B6)

Question 13

Give the products for the following reaction.

Accepted Answer

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

Question 14

Which of the following reactions does the coenzyme biotin catalyze?

Accepted Answer

A) decarboxylation of an α-keto acid 
B) decarboxylation of an α-carboxy acid 
C) carboxylation of an α-carboxy acid 
D) decarboxylation of a carbon adjacent to an ester or keto group 
E) carboxylation of a carbon adjacent to an ester or keto group 
A) decarboxylation of an α-keto acid 
B) decarboxylation of an α-carboxy acid 
C) carboxylation of an α-carboxy acid 
D) decarboxylation of a carbon adjacent to an ester or keto group 
E) carboxylation of a carbon adjacent to an ester or keto group

Question 15

All redox chemistry of the pyridine nucleotide coenzymes takes place at the ________-position of the pyridine ring.

Accepted Answer

The answer of All redox chemistry of the pyridine nucleotide...

Question 16

What structural feature of enzymes that catalyze redox reactions requires the presence of a coenzyme for reaction to occur?

Accepted Answer

An enzyme that catalyzes a red

Question 17

Give the product of the following reaction.

Accepted Answer

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

Question 18

Which of the following statements is true about metabolism?

Accepted Answer

A) reactions that living organisms carry out to obtain energy and to synthesize required compounds 
B) reactions that organic chemists carry out to obtain energy and to synthesize required compounds 
C) reactions that consist of catabolic and anabolic reactions 
D) A and C 
E) B and C 
A) reactions that living organisms carry out to obtain energy and to synthesize required compounds 
B) reactions that organic chemists carry out to obtain energy and to synthesize required compounds 
C) reactions that consist of catabolic and anabolic reactions 
D) A and C 
E) B and C

Question 19

Which type of vitamins,water-soluble or lipid-soluble,can cause overdose?

Accepted Answer

One can overdose on lipid-solu

Question 20

Which of the following is a water-soluble vitamin?

Accepted Answer

A) vitamin B12 
B) riboflavin (vitamin B2) 
C) thiamine (vitamin B1) 
D) pyridoxine (vitamin B6) 
E) all of the above 
A) vitamin B12 
B) riboflavin (vitamin B2) 
C) thiamine (vitamin B1) 
D) pyridoxine (vitamin B6) 
E) all of the above

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

Which of the following vitamins is needed for isomerization reactions?

Which of the following vitamins is needed for amino acid α,β-eliminations?

Generally speaking,which of the following oxidation-reduction reactions utilize NAD+ and NADP+ as oxidation coenzymes?

Give the purpose of thymidylate synthase.

Which of the following statements is true about 5-fluorouracil?

Pantothenic acid is used to form the coenzyme(s)

How does CoASH used in biological systems to activate carboxylic acids?

A deficiency of ________ results in megoblastic anemia.

Which of the following vitamins are radical inhibitors or antioxidants?

In which of the following classes of reactions is a coenzyme required?

Give the product for the following reaction.

Which of the following vitamins is the only water-soluble vitamin that does not function as a coenzyme?

Give the products for the following reaction.

Which of the following reactions does the coenzyme biotin catalyze?

All redox chemistry of the pyridine nucleotide coenzymes takes place at the ________-position of the pyridine ring.

What structural feature of enzymes that catalyze redox reactions requires the presence of a coenzyme for reaction to occur?

Give the product of the following reaction.

Which of the following statements is true about metabolism?

Which type of vitamins,water-soluble or lipid-soluble,can cause overdose?

Which of the following is a water-soluble vitamin?

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

Generally speaking,which of the following oxidation-reduction reactions utilize NAD⁺ and NADP⁺ as oxidation coenzymes?