Question 1

If the mRNA codon was CUCUCUCUC, what amino acids would be present in the tripeptide?

Accepted Answer

A)   Phe-Ser-Leu
B)   Ser-Phe-Ser
C)   Leu-Phe-Leu
D)   Leu-Ser-Leu
E)   Phe-Ser-PheF) B) and D)
G) A) and E)

Question 2

A polynucleotide was made from the dinucleotide, UA.Based on the previous problem, only one amino acid can be identified.What is that amino acid?

Accepted Answer

A)   Ile
B)   Tyr
C)   Leu
D)   Ser
E)   none can be identifiedF) A) and B)
G) C) and E)

Question 3

Which ring of NAD, below, is reduced to produce NADH?

Accepted Answer

A)   I
B)   II
C)   III
D)   IV
E)   VF) B) and D)
G) A) and E) A

Question 4

What helical conformation of DNA is the most predominant form?

Accepted Answer

A)   A
B)   B
C)   Z
D)   E
E)   there is no predominant formF) A) and E)
G) D) and E)

Question 5

If the sequence in a strand of DNA is 5' TCGACGAGC 3'
The complementary mRNA strand will be

Accepted Answer

A)   3' AGCUGCUCG 5'
B)   3' UGCTGCTCG 5'
C)   3' AGUTGTUG 5'
D)   5' UGCTGCTCG 3'
E)   5' AGCUGCUCG 3'F) A) and D)
G) C) and D) A

Question 6

What is the usual group present on the 5' terminal nucleotide of mRNA?

Accepted Answer

A)   an amide
B)   a monophosphate
C)   a diphosphate
D)   a triphosphate
E)   an alcoholF) A) and D)
G) A) and C)

Question 7

What is the name of the base in the following nucleotide?

Accepted Answer

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

Question 8

What is the structure of the sugar in RNA?

Accepted Answer

A)   
B)   
C)   
D)   
E)   F) All of the above
G) A) and B)

Question 9

Which base is NOT present in DNA but is present in RNA?

Accepted Answer

A)   adenine
B)   cytosine
C)   uracil
D)   guanine
E)   thymineF) C) and E)
G) A) and D)

Question 10

If the sequence in a strand of DNA is 5' AGCCATGT 3'
The complementary DNA strand will be

Accepted Answer

A)   5' TCGGTACA 3'
B)   5' GATTGCAC 3'
C)   3' TCGGTACA 5'
D)   3' GATTGCAC 5'
E)   3' TGTACCGA 5'F) A) and C)
G) None of the above

Question 11

Which of the following structures is a pyrimidine?

Accepted Answer

A)   
B)   
C)   
D)   
E)   F) C) and D)
G) A) and D)

Question 12

The most basic nitrogen in caffeine is:

Accepted Answer

A)   N-1
B)   N-2
C)   N-3
D)   N-4
E)   all of the nitrogens are equally basicF) C) and E)
G) B) and D)

Question 13

Upon hydrolysis which biologically important nucleotide releases the most energy?

Accepted Answer

A)   AMP
B)   ADP
C)   ATP
D)   NAD
E)   NADPF) A) and B)
G) C) and D) C

Question 14

Which of the following nucleotides is ATP?

Accepted Answer

A)   I
B)   II
C)   III
D)   IV
E)   none of theseF) A) and D)
G) B) and C)

Question 15

The sugar-phosphate backbone of RNA:

Accepted Answer

A)   is negatively charged at pH 7
B)   contains the pentose ribose
C)   forms ionic complexes with ammonium salts at pH 7
D)   all of the above
E)   none of the aboveF) A) and B)
G) B) and D)

Question 16

Which of the following structures is the  β\betaβ -N-glycoside of 2-deoxyribose-D-ribose and dimethylamine?

Accepted Answer

A)   
B)   
C)   
D)   
E)    F) A) and B)
G) A) and E)

Question 17

The process that converts DNA into mRNA is called

Accepted Answer

A)   translation.
B)   transcription.
C)   translocation.
D)   protein biosynthesis.
E)   transformation.F) None of the above
G) A) and D)

Question 18

Transfer RNAs

Accepted Answer

A)   exist as a double helix.
B)   form base pairs with messenger RNA during protein biosynthesis.
C)   catalyze DNA transcription.
D)   exist solely as  β\betaβ -sheets.
E)   contain 2-deoxyribose as a backbone component. F) A) and B)
G) C) and E)

Question 19

A polyribonucleotide prepared from the tetranucleotide AUAC, when subjected to peptide synthesizing conditions, gave the polypeptide Ile-His-Thr-Tyr.A codon for Threonine (Thr)  must be

Accepted Answer

A)   AUA
B)   AAU
C)   UAC
D)   CAU
E)   ACAF) B) and D)
G) A) and B)

Question 20

What is the correct abbreviation used for the following molecule?

Accepted Answer

A)   dAMP
B)   dCMP
C)   dGMP
D)   dTMP
E)   TMPF) None of the above
G) All of the above

Exam 18: Nucleotides and Nucleic Acids

If the mRNA codon was CUCUCUCUC, what amino acids would be present in the tripeptide?

Correct AnswerverifiedShow Answer

A polynucleotide was made from the dinucleotide, UA.Based on the previous problem, only one amino acid can be identified.What is that amino acid?

Correct AnswerverifiedShow Answer

Which ring of NAD, below, is reduced to produce NADH?

Correct AnswerverifiedA

What helical conformation of DNA is the most predominant form?

Correct AnswerverifiedShow Answer

If the sequence in a strand of DNA is 5' TCGACGAGC 3' The complementary mRNA strand will be

Correct AnswerverifiedA

What is the usual group present on the 5' terminal nucleotide of mRNA?

Correct AnswerverifiedShow Answer

What is the name of the base in the following nucleotide?

Correct AnswerverifiedShow Answer

What is the structure of the sugar in RNA?

Correct AnswerverifiedShow Answer

Which base is NOT present in DNA but is present in RNA?

Correct AnswerverifiedShow Answer

If the sequence in a strand of DNA is 5' AGCCATGT 3' The complementary DNA strand will be

Correct AnswerverifiedShow Answer

Which of the following structures is a pyrimidine?

Correct AnswerverifiedShow Answer

The most basic nitrogen in caffeine is:

Correct AnswerverifiedShow Answer

Upon hydrolysis which biologically important nucleotide releases the most energy?

Correct AnswerverifiedC

Which of the following nucleotides is ATP?

Correct AnswerverifiedShow Answer

The sugar-phosphate backbone of RNA:

Correct AnswerverifiedShow Answer

Which of the following structures is the β\betaβ -N-glycoside of 2-deoxyribose-D-ribose and dimethylamine?

Correct AnswerverifiedShow Answer

The process that converts DNA into mRNA is called

Correct AnswerverifiedShow Answer

Transfer RNAs

Correct AnswerverifiedShow Answer

A polyribonucleotide prepared from the tetranucleotide AUAC, when subjected to peptide synthesizing conditions, gave the polypeptide Ile-His-Thr-Tyr.A codon for Threonine (Thr) must be

Correct AnswerverifiedShow Answer

What is the correct abbreviation used for the following molecule?

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
A

Correct Answer
verified

Correct Answer
verified
A

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
C

Correct Answer
verified

Correct Answer
verified

Which of the following structures is the $\beta$ -N-glycoside of 2-deoxyribose-D-ribose and dimethylamine?

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified