Question 1

Identify the type(s)of base pairing present in DNA.You may choose more than one answer.

Accepted Answer

A) adenine and thymine 
B) cytosine and guanine 
C) cytosine and thymine 
D) adenine and uracil 
E) thymine and adenine 
A) adenine and thymine 
B) cytosine and guanine 
C) cytosine and thymine 
D) adenine and uracil 
E) thymine and adenine

Question 2

Why is RNA more easily cleaved than DNA?

Accepted Answer

The 2'-OH in the rib

Question 3

Name the two purine bases which serve as components in ribonucleosides.

Accepted Answer

The answer of Name the two purine bases which serve...

Question 4

Which of the following are known as pyrimidines?

Accepted Answer

A) cytosine and thymine 
B) adenine and cytosine 
C) adenine and thymine 
D) guanine and thymine 
E) adenine and guanine 
A) cytosine and thymine 
B) adenine and cytosine 
C) adenine and thymine 
D) guanine and thymine 
E) adenine and guanine

Question 5

Give the first step of PCR.

Accepted Answer

A) esterification 
B) strand separation 
C) base-pairing of the primers 
D) DNA synthesis 
E) hydrolysis 
A) esterification 
B) strand separation 
C) base-pairing of the primers 
D) DNA synthesis 
E) hydrolysis

Question 6

Which of the following statements is not true about the structure of DNA as proposed by Watson and Crick?

Accepted Answer

A) The number of adenines in DNA is equal to the number of thymines. 
B) The number of cytosines is equal to the number of guanines. 
C) DNA consists of two strands of nucleic acids with the sugar-phosphate backbone on the inside and the bases on the outside. 
D) The chains in DNA are held together by hydrogen bonding. 
E) Adenine always pairs with thymine and guanine always pairs with cytosine. 
A) The number of adenines in DNA is equal to the number of thymines. 
B) The number of cytosines is equal to the number of guanines. 
C) DNA consists of two strands of nucleic acids with the sugar-phosphate backbone on the inside and the bases on the outside. 
D) The chains in DNA are held together by hydrogen bonding. 
E) Adenine always pairs with thymine and guanine always pairs with cytosine.

Question 7

Draw the structure of cytidine 5'-phosphate.

Accepted Answer

The answer of Draw the structure of cytidine 5'-phosphate....

Question 8

Give the order for base pairing for the following strand. G-C-A-T-T-C-C-G-A-T

Accepted Answer

A) C-G-U-A-A-G-G-C-U-A 
B) U-G-T-A-A-G-G-U-T-U 
C) A-T-G-C-C-T-T-A-G-C 
D) T-A-C-G-G-A-A-T-C-G 
E) C-G-T-A-A-G-G-C-T-A 
A) C-G-U-A-A-G-G-C-U-A 
B) U-G-T-A-A-G-G-U-T-U 
C) A-T-G-C-C-T-T-A-G-C 
D) T-A-C-G-G-A-A-T-C-G 
E) C-G-T-A-A-G-G-C-T-A

Question 9

Which of the following metal ions complexes with cellular ATP to neutralize some of its negative charges at the active site of an enzyme in order that nucleophilic substitution reactions proceed rapidly?

Accepted Answer

A) manganese 
B) iron 
C) cobalt 
D) magnesium 
E) calcium 
A) manganese 
B) iron 
C) cobalt 
D) magnesium 
E) calcium

Question 10

Which of the following is the proper name of the nucleoside made from adenine and found in DNA?

Accepted Answer

A) adenosine 
B) 2'-deoxyadenosine 
C) 2-deoxyadenosine 
D) 2'-oxyadenosine 
E) 2'-deoxyadenine 
A) adenosine 
B) 2'-deoxyadenosine 
C) 2-deoxyadenosine 
D) 2'-oxyadenosine 
E) 2'-deoxyadenine

Question 11

What are antigene and antisense agents?

Accepted Answer

They are synthetic polymers that bind to

Question 12

Draw the structure of 2'-deoxycytidine 3'-monophosphate.

Accepted Answer

The answer of Draw the structure of 2'-deoxycytidine 3'-monophosphate....

Question 13

Which of the following reactions converts nucleotide subunits into nucleic acids?

Accepted Answer

A) nucleophilic attack on the α-phosphorus of ATP 
B) nucleophilic attack on the β-phosphorus of ATP 
C) nucleophilic attack on the γ-phosphorus of ATP 
D) A and B 
E) A,B,and C 
A) nucleophilic attack on the α-phosphorus of ATP 
B) nucleophilic attack on the β-phosphorus of ATP 
C) nucleophilic attack on the γ-phosphorus of ATP 
D) A and B 
E) A,B,and C

Question 14

Identify the sugar and the base in the structure below.

Accepted Answer

b-D-2-deox

Question 15

Propose a mechanism for the following reaction.

Accepted Answer

The answer of Propose a mechanism for the following reaction....

Question 16

The antiviral drug,idoxuridine is incorporated into the DNA in place of which of the following nucleobases?

Accepted Answer

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

Question 17

List the number of pairs of chromosomes in a human.

Accepted Answer

A) 18 pairs of chromosomes 
B) 20 pairs of chromosomes 
C) 23 pairs of chromosomes 
D) 25 pairs of chromosomes 
E) 27 pairs of chromosomes 
A) 18 pairs of chromosomes 
B) 20 pairs of chromosomes 
C) 23 pairs of chromosomes 
D) 25 pairs of chromosomes 
E) 27 pairs of chromosomes

Question 18

Name the compound.

Accepted Answer

uridine 5'

Question 19

Identify the bonding in DNA between the nucleotides.

Accepted Answer

A) 5' to 4' 
B) 5' to 3' 
C) 3' to 5' 
D) 4' to 3' 
E) 3' to 4' 
A) 5' to 4' 
B) 5' to 3' 
C) 3' to 5' 
D) 4' to 3' 
E) 3' to 4'

Question 20

Which of the following bases distinguish DNA from RNA?

Accepted Answer

A) adenine and cytosine 
B) guanine and uracil 
C) thymine and uracil 
D) uracil and guanine 
E) adenine and thymine 
A) adenine and cytosine 
B) guanine and uracil 
C) thymine and uracil 
D) uracil and guanine 
E) adenine and thymine

Exam 26: The Chemistry of the Nucleic Acids

Identify the type(s)of base pairing present in DNA.You may choose more than one answer.

Why is RNA more easily cleaved than DNA?

Name the two purine bases which serve as components in ribonucleosides.

Which of the following are known as pyrimidines?

Give the first step of PCR.

Which of the following statements is not true about the structure of DNA as proposed by Watson and Crick?

Draw the structure of cytidine 5'-phosphate.

Give the order for base pairing for the following strand. G-C-A-T-T-C-C-G-A-T

Which of the following metal ions complexes with cellular ATP to neutralize some of its negative charges at the active site of an enzyme in order that nucleophilic substitution reactions proceed rapidly?

Which of the following is the proper name of the nucleoside made from adenine and found in DNA?

What are antigene and antisense agents?

Draw the structure of 2'-deoxycytidine 3'-monophosphate.

Which of the following reactions converts nucleotide subunits into nucleic acids?

Identify the sugar and the base in the structure below.

Propose a mechanism for the following reaction.

The antiviral drug,idoxuridine is incorporated into the DNA in place of which of the following nucleobases?

List the number of pairs of chromosomes in a human.

Name the compound.

Identify the bonding in DNA between the nucleotides.

Which of the following bases distinguish DNA from RNA?

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

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