Question 1

What sequence of bases on the second strand of DNA is complementary to the following?
(5')GCATTA (3')

Accepted Answer

(3')CGTAAT (5')or (5')TAATGC (3')

Question 2

How many hydrogen bonds are present in a G-C base pair and an A-T base pair,respectively?

Accepted Answer

A) 1,2 
B) 2,2 
C) 2,3 
D) 3,2 
E) 3,3 
A) 1,2 
B) 2,2 
C) 2,3 
D) 3,2 
E) 3,3 D

Question 3

Which reagent is used to accelerate coupling reactions in both laboratory peptide synthesis and laboratory DNA synthesis?

Accepted Answer

A) catalytic H+ 
B) dicyclohexylcarbodiimide (DC
C)  
C) ethyl chloroformate 
D) NaOH 
E) PhS- NH4+ 
A) catalytic H+ 
B) dicyclohexylcarbodiimide (DC
C)  
C) ethyl chloroformate 
D) NaOH 
E) PhS- NH4+ B

Question 4

What amino acid sequence is coded by the following segment of DNA?
(5')TTA-GCC-GTA-CTA-AAA (3')

Accepted Answer

Asn-Arg-Hi

Question 5

Answer the following questions.
a) If the following segment of mRNA
(5') CUU-AGC-UGG-CCC (3')
was changed to
(5') CUU-AGC-UGG-CCU (3')
how would the synthesized protein change?
b) If the following segment of mRNA
(5') CUU-AGC-UGG-CCC (3')
was changed to
(5') CUU-AGC-UGA-CCU (3')
how would the synthesized protein change?

Accepted Answer

a)  No change, both CCC and CC

Question 6

What sequence is fully complementary to the following sequence?
(5')ATCTAGTCA (3')

Accepted Answer

A) (5')TAGATCAGT (3') 
B) (5')TGACTAGAT (3') 
C) (5')ATCTAGTCA (3') 
D) (5')ACTGATCTA (3') 
A) (5')TAGATCAGT (3') 
B) (5')TGACTAGAT (3') 
C) (5')ATCTAGTCA (3') 
D) (5')ACTGATCTA (3')

Question 7

The bond between the nitrogenous base and the sugar in a nucleoside is a glycosidic bond.Which type of reagent should cleave this bond?

Accepted Answer

A) acid 
B) base 
C) acid or base 
D) neither acid nor base 
E) It depends on which nitrogenous base and which sugar are present. 
A) acid 
B) base 
C) acid or base 
D) neither acid nor base 
E) It depends on which nitrogenous base and which sugar are present.

Question 8

Rank DNA,mRNA,and tRNA from largest to smallest.

Accepted Answer

A) DNA > mRNA > tRNA 
B) DNA > tRNA > mRNA 
C) mRNA > tRNA > DNA 
D) mRNA > DNA > tRNA 
E) tRNA > mRNA > DNA 
A) DNA > mRNA > tRNA 
B) DNA > tRNA > mRNA 
C) mRNA > tRNA > DNA 
D) mRNA > DNA > tRNA 
E) tRNA > mRNA > DNA

Question 9

Which of the following characterizes the polymerase chain reaction (PCR)?

Accepted Answer

A) produces multiple copies of DNA segments 
B) requires small amount of the source DNA 
C) the key to the process is a thermally stable enzyme 
D) involves temperature cycling 
E) all of these 
A) produces multiple copies of DNA segments 
B) requires small amount of the source DNA 
C) the key to the process is a thermally stable enzyme 
D) involves temperature cycling 
E) all of these

Question 10

In some instances,base pairs other than the familiar G-C and A-T matches can form.For these alternate pairs to form,one of the two bases must tautomerize.Based on this information,draw a C-A pair and determine the number of hydrogen bonds that would stabilize the pair.

Accepted Answer

Two hydrog

Question 11

Base pairs in DNA are

Accepted Answer

A) parallel to each other and parallel to the long axis of the DNA molecule 
B) parallel to each other and perpendicular to the long axis of the DNA molecule 
C) parallel to each other,with random orientations to the long axis of the DNA molecule 
D) perpendicular to each other,with every other base pair parallel to the long axis of the DNA molecule 
E) perpendicular to each other,with random orientations to the long axis of the DNA molecule 
A) parallel to each other and parallel to the long axis of the DNA molecule 
B) parallel to each other and perpendicular to the long axis of the DNA molecule 
C) parallel to each other,with random orientations to the long axis of the DNA molecule 
D) perpendicular to each other,with every other base pair parallel to the long axis of the DNA molecule 
E) perpendicular to each other,with random orientations to the long axis of the DNA molecule

Question 12

Which of the following is uridine?

Accepted Answer

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

Question 13

Which of the following represents the general sequence of events in the catabolism of nucleic acids?

Accepted Answer

A) hydrolysis,dephosphorylation,cleavage of the sugar 
B) cleavage of the sugar,dephosphorylation,hydrolysis 
C) dephosphorylation,hydrolysis,cleavage of the sugar 
D) hydrolysis,cleavage of the sugar,dephosphorylation 
E) dephosphorylation,cleavage of the sugar,hydrolysis 
A) hydrolysis,dephosphorylation,cleavage of the sugar 
B) cleavage of the sugar,dephosphorylation,hydrolysis 
C) dephosphorylation,hydrolysis,cleavage of the sugar 
D) hydrolysis,cleavage of the sugar,dephosphorylation 
E) dephosphorylation,cleavage of the sugar,hydrolysis

Question 14

Describe,in general terms,the steps involved in the automated synthesis of the DNA sequence GCT.

Accepted Answer

The answer of Describe,in general terms,the steps involved in the...

Question 15

What mRNA sequence is complementary to the following DNA base sequence?
(5')TAAGGCGATA (3')

Accepted Answer

(3')AUUCCG

Question 16

What is the anticodon sequence in tRNA that corresponds the following segment of mRNA?
(5')CUU-AGC-UGG-CCC(3')

Accepted Answer

(3')GAA-UC

Question 17

Which of the following is a definition of messenger RNA (mRNA)?

Accepted Answer

A) RNA found in the ribosome,the site in cells where synthesis of proteins takes place 
B) RNA which carries a specific amino acid to the site of protein synthesis 
C) RNA which has coded genetic information 
D) RNA which signals cell death 
A) RNA found in the ribosome,the site in cells where synthesis of proteins takes place 
B) RNA which carries a specific amino acid to the site of protein synthesis 
C) RNA which has coded genetic information 
D) RNA which signals cell death

Question 18

A double-stranded DNA molecule that contains 22%,on a mole basis,T must also contain

Accepted Answer

A) 11% G 
B) 22% G 
C) 28% G 
D) 56% G 
E) 78% G 
A) 11% G 
B) 22% G 
C) 28% G 
D) 56% G 
E) 78% G

Question 19

DNA can best be described as

Accepted Answer

A) two backbones of alternating deoxyribose and nitrogenous base on the exterior,with phosphates on the interior 
B) two backbones of alternating deoxyribose and nitrogenous base on the interior,with phosphates on the exterior 
C) two backbones of alternating deoxyribose and phosphate on the exterior,with nitrogenous bases on the interior 
D) two backbones of alternating deoxyribose and phosphate on the interior,with nitrogenous bases on the exterior 
E) two backbones of alternating nitrogenous base and phosphate on the exterior,with deoxyriboses on the interior 
A) two backbones of alternating deoxyribose and nitrogenous base on the exterior,with phosphates on the interior 
B) two backbones of alternating deoxyribose and nitrogenous base on the interior,with phosphates on the exterior 
C) two backbones of alternating deoxyribose and phosphate on the exterior,with nitrogenous bases on the interior 
D) two backbones of alternating deoxyribose and phosphate on the interior,with nitrogenous bases on the exterior 
E) two backbones of alternating nitrogenous base and phosphate on the exterior,with deoxyriboses on the interior

Question 20

Which is true?

Accepted Answer

A) Both DNA and RNA are completely double-stranded. 
B) Both DNA and RNA are completely single-stranded. 
C) Both DNA and RNA contain ribose. 
D) Both DNA and RNA contain uracil. 
E) Both DNA and RNA contain phosphate. 
A) Both DNA and RNA are completely double-stranded. 
B) Both DNA and RNA are completely single-stranded. 
C) Both DNA and RNA contain ribose. 
D) Both DNA and RNA contain uracil. 
E) Both DNA and RNA contain phosphate.

Exam 24: Biomolecules: Nucleic Acids and Their Metabolism

What sequence of bases on the second strand of DNA is complementary to the following? (5')GCATTA (3')

How many hydrogen bonds are present in a G-C base pair and an A-T base pair,respectively?

Which reagent is used to accelerate coupling reactions in both laboratory peptide synthesis and laboratory DNA synthesis?

What amino acid sequence is coded by the following segment of DNA? (5')TTA-GCC-GTA-CTA-AAA (3')

What sequence is fully complementary to the following sequence? (5')ATCTAGTCA (3')

The bond between the nitrogenous base and the sugar in a nucleoside is a glycosidic bond.Which type of reagent should cleave this bond?

Rank DNA,mRNA,and tRNA from largest to smallest.

Which of the following characterizes the polymerase chain reaction (PCR)?

In some instances,base pairs other than the familiar G-C and A-T matches can form.For these alternate pairs to form,one of the two bases must tautomerize.Based on this information,draw a C-A pair and determine the number of hydrogen bonds that would stabilize the pair.

Base pairs in DNA are

Which of the following is uridine?

Which of the following represents the general sequence of events in the catabolism of nucleic acids?

Describe,in general terms,the steps involved in the automated synthesis of the DNA sequence GCT.

What mRNA sequence is complementary to the following DNA base sequence? (5')TAAGGCGATA (3')

What is the anticodon sequence in tRNA that corresponds the following segment of mRNA? (5')CUU-AGC-UGG-CCC(3')

Which of the following is a definition of messenger RNA (mRNA)?

A double-stranded DNA molecule that contains 22%,on a mole basis,T must also contain

DNA can best be described as

Which is true?

Structure and Bonding

Polar Covalent Bonds: Acids and Bases

Organic Compounds: Alkanes and Their Stereochemistry

Organic Compounds: Cycloalkanes and Their Stereochemistry

Stereochemistry at Tetrahedral Centers

An Overview of Organic Reactions

Alkenes and Alkynes

Reactions of Alkenes and Alkynes

Aromatic Compounds

Structure Determination: Mass Spectrometry,infrared Spectroscopy,and Ultraviolet Spectroscopy

Structure Determination: Nuclear Magnetic Resonance Spectroscopy

Organohalides: Nucleophilic Substitutions and Eliminations

Alcohols,phenols,and Thiols: Ethers and Sulfides

Aldehydes and Ketones: Nucleophilic Addition Reactions

Carboxylic Acids and Nitriles

Carboxylic Acid Derivatives: Nucleophilic Acyl Substitution Reactions

Carbonyl Alpha-Substitution and Condensation Reactions

Amines and Heterocycles

Biomolecules: Amino Acids,peptides,and Proteins

Amino Acid Metabolism

Biomolecules: Carbohydrates

Carbohydrate Metabolism

Biomolecules: Lipids and Their Metabolism

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