Question 1

Draw the deaminated product of guanine.

Accepted Answer

The answer of Draw the deaminated product of guanine....

Question 2

During the synthesis of dUMP to dTMP,dihydrofolate is reduced to tetrahydrofolate by

Accepted Answer

A) NAPH 
B) NADPH 
C) FADH 
D) NADH 
E) ATP 
A) NAPH 
B) NADPH 
C) FADH 
D) NADH 
E) ATP B

Question 3

Draw the structure of UDP.

Accepted Answer

The answer of Draw the structure of UDP....

Question 4

Show that you understand how the structural components of DNA are bonded together by drawing a linear segment that contains 3 base residues.

Accepted Answer

Other choices for th

Question 5

What is a nucleoside? Give an example.

Accepted Answer

A nucleosi

Question 6

What is the sequence of bases in the strand of DNA that is complementary to that shown below? 5'-T-T-C-A-C-T-G-A-C-3'

Accepted Answer

A) 5'-T-T-C-A-C-T-G-A-C-3' 
B) 3'-T-T-C-A-C-T-G-A-C-5' 
C) 5'-A-A-G-T-G-A-C-T-G-3' 
D) 5'-G-T-C-A-G-T-G-A-A-3' 
E) 3'-U-U-C-A-C-U-G-A-C-5' 
A) 5'-T-T-C-A-C-T-G-A-C-3' 
B) 3'-T-T-C-A-C-T-G-A-C-5' 
C) 5'-A-A-G-T-G-A-C-T-G-3' 
D) 5'-G-T-C-A-G-T-G-A-A-3' 
E) 3'-U-U-C-A-C-U-G-A-C-5'

Question 7

Besides a possible difference in base structure,what is the major structural difference between ribo- and deoxyribonucleosides?

Accepted Answer

Deoxyribonucleosides

Question 8

Which of the following reaction sequences best describes the formation of the nucleic acid in the biosynthesis of DNA?

Accepted Answer

A) nucleophilic attack of a 5'-OH group of one nucleotide on the β-phosphorus of another 
B) nucleophilic attack of a 5'-OH group of one nucleotide on the α-phosphorus of another 
C) nucleophilic attack of a 3'-OH group of a nucleotide on the γ-phosphorus of another 
D) nucleophilic attack of a 3'-OH group of one nucleotide on the β-phosphorus of another 
E) nucleophilic attack of a 3'-OH group of one nucleotide on the α-phosphorus of another 
A) nucleophilic attack of a 5'-OH group of one nucleotide on the β-phosphorus of another 
B) nucleophilic attack of a 5'-OH group of one nucleotide on the α-phosphorus of another 
C) nucleophilic attack of a 3'-OH group of a nucleotide on the γ-phosphorus of another 
D) nucleophilic attack of a 3'-OH group of one nucleotide on the β-phosphorus of another 
E) nucleophilic attack of a 3'-OH group of one nucleotide on the α-phosphorus of another

Question 9

Identify the nucleoside shown below.

Accepted Answer

The answer of Identify the nucleoside shown below.  ...

Question 10

Draw the structure of dTTP.

Accepted Answer

The answer of Draw the structure of dTTP....

Question 11

Which of the following statements concerning DNA,RNA,and their components is (are)not correct?

Accepted Answer

A) Phosphoric acid has three dissociable OH groups which can also react with alcohols to form phosphoesters. 
B) Across the DNA helix,purine bases hydrogen bond only to other purine bases. 
C) The two substituted pyrimidines in DNA are cytosine and thymine. 
D) both B and C 
E) none of the above 
A) Phosphoric acid has three dissociable OH groups which can also react with alcohols to form phosphoesters. 
B) Across the DNA helix,purine bases hydrogen bond only to other purine bases. 
C) The two substituted pyrimidines in DNA are cytosine and thymine. 
D) both B and C 
E) none of the above

Question 12

Which of the following is the conventional method of writing the base sequence of a portion of a DNA chain?

Accepted Answer

A) 5'-end--bases--5'-end 
B) 5'-end--bases--3'-end 
C) 3'-end--bases--5'-end 
D) 3'-end--bases--3'-end 
E) 5'-end--bases--2'-end 
A) 5'-end--bases--5'-end 
B) 5'-end--bases--3'-end 
C) 3'-end--bases--5'-end 
D) 3'-end--bases--3'-end 
E) 5'-end--bases--2'-end

Question 13

Identify the sugar and the base in the structure below.

Accepted Answer

b-D-ribofu

Question 14

What is genetic engineering?

Accepted Answer

The process of insertion of a

Question 15

When phosphoric acid is heated it loses water to form an anhydride known as pyrophosphate or pyrophosphoric acid.What is the structure of pyrophosphoric acid?

Accepted Answer

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

Question 16

Show the hydrogen bonding which occurs when guanine and cytosine form a base pair.

Accepted Answer

The answer of Show the hydrogen bonding which occurs when...

Question 17

Which of the following is the first step in the mechanism of the reaction shown below?

Accepted Answer

A) Carboxylate ion attacks the thiol. 
B) Carboxylate ion attacks the α-phosphorus of ATP. 
C) Carboxylate ion attacks the γ-phosphorus of ATP. 
D) Thiol molecule attacks the β-phosphorus of ATP. 
E) Thiol molecule attacks the acyl group. 
A) Carboxylate ion attacks the thiol. 
B) Carboxylate ion attacks the α-phosphorus of ATP. 
C) Carboxylate ion attacks the γ-phosphorus of ATP. 
D) Thiol molecule attacks the β-phosphorus of ATP. 
E) Thiol molecule attacks the acyl group.

Question 18

Which of the following phosphate groups is found in nucleic acids?

Accepted Answer

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

Question 19

Give the maximum number of different codons possible.

Accepted Answer

A) 56 
B) 60 
C) 64 
D) 70 
E) 76 
A) 56 
B) 60 
C) 64 
D) 70 
E) 76

Question 20

Which of the following statements concerning nucleic acids is not correct?

Accepted Answer

A) The enzymes that catalyze DNA synthesis are known as DNA polymerases. 
B) The growing DNA polymer is synthesized in the 5' to 3' direction. 
C) RNA strands are synthesized in the 3' to 5' direction. 
D) In DNA the distance between the strands of the double helix is relatively constant. 
E) Unlike DNA,RNA is easily cleaved because the 2'-OH group of the ribose can act as the nucleophile that cleaves the strand. 
A) The enzymes that catalyze DNA synthesis are known as DNA polymerases. 
B) The growing DNA polymer is synthesized in the 5' to 3' direction. 
C) RNA strands are synthesized in the 3' to 5' direction. 
D) In DNA the distance between the strands of the double helix is relatively constant. 
E) Unlike DNA,RNA is easily cleaved because the 2'-OH group of the ribose can act as the nucleophile that cleaves the strand.

Exam 26: The Chemistry of the Nucleic Acids

Draw the deaminated product of guanine.

During the synthesis of dUMP to dTMP,dihydrofolate is reduced to tetrahydrofolate by

Draw the structure of UDP.

Show that you understand how the structural components of DNA are bonded together by drawing a linear segment that contains 3 base residues.

What is a nucleoside? Give an example.

What is the sequence of bases in the strand of DNA that is complementary to that shown below? 5'-T-T-C-A-C-T-G-A-C-3'

Besides a possible difference in base structure,what is the major structural difference between ribo- and deoxyribonucleosides?

Which of the following reaction sequences best describes the formation of the nucleic acid in the biosynthesis of DNA?

Identify the nucleoside shown below.

Draw the structure of dTTP.

Which of the following statements concerning DNA,RNA,and their components is (are)not correct?

Which of the following is the conventional method of writing the base sequence of a portion of a DNA chain?

Identify the sugar and the base in the structure below.

What is genetic engineering?

When phosphoric acid is heated it loses water to form an anhydride known as pyrophosphate or pyrophosphoric acid.What is the structure of pyrophosphoric acid?

Show the hydrogen bonding which occurs when guanine and cytosine form a base pair.

Which of the following is the first step in the mechanism of the reaction shown below?

Which of the following phosphate groups is found in nucleic acids?

Give the maximum number of different codons possible.

Which of the following statements concerning nucleic acids is not correct?

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 the Metabolic Pathways

The Organic Chemistry of Lipids

Synthetic Polymers

Pericyclic Reactions

Filters