Question 1

Which codon from the list below, codes a different amino acid than the others?

Accepted Answer

A)  CUU
B)  CUC
C)  UUA
D)  UUU
E)  CUAF) B) and D)
G) C) and D)

Question 2

During elongation, an incoming charged tRNA enters at the _____ site of the ribosome.

Accepted Answer

A)  peptidyl (P) 
B)  aminoacyl (
A)  
C)  exit (
E)  
D)  Shine-Dalgarno
E)  KozakF) B) and D)
G) All of the above

Question 3

How many different amino acid sequences can be encoded by the sequence of 9 nucleotides long (ignore the possibility of stop codons) ?

Accepted Answer

A)  9
B)  180
C)  900
D)  4000
E)  8000F) A) and B)
G) B) and E)

Question 4

Can a human gene sequence be transcribed and translated inside an E.coli cell (assume it has a functional promoter sequence) ?

Accepted Answer

A)  It can be only translated, not transcribed.
B)  No, it cannot be transcribed and translated.
C)  Yes, it can be transcribed and translated.
D)  It can be only transcribed, not translated.
E)  
E)  coli cells generally lack ribosomes.F) D) and E)
G) A) and D)

Question 5

Which amino acids are encoded if the reading frame is as shown below, starting from the correct end?
5' ...GGAGCUCGUUGUAUU...3'

Accepted Answer

GLY-ALA-AR...

Question 6

Which of the following is NOT required during the process of tRNA charging?

Accepted Answer

A)  Amino acid
B)  tRNA
C)  GTP
D)  ATP
E)  Aminoacyl-tRNA synthetaseF) A) and B)
G) B) and D)

Question 7

Codons that specify the same amino acid are said to be:

Accepted Answer

A)  wobbly.
B)  isoaccepting.
C)  hypothetical.
D)  synonymous.
E)  anonymous.F) A) and B)
G) None of the above

Question 8

The amino acid sequence of a polypeptide is referred to as the _____ sequence of the polypeptide.

Accepted Answer

A)  primary
B)  secondary
C)  tertiary
D)  quaternaryE) All of the above
F) B) and C)

Question 9

How many reading frames are encoded by the sense nucleotide strand?

Accepted Answer

A)  One
B)  Two
C)  Three
D)  Six
E)  TenF) B) and E)
G) All of the above

Question 10

What level of protein structure is expressed in the following: VAL-LYS-GLY?

Accepted Answer

A)  Primary
B)  Secondary
C)  Tertiary
D)  QuaternaryE) None of the above
F) B) and C)

Question 11

There are _____ different codons, which encode 20 amino acids and three stop codons.

Accepted Answer

A)  16
B)  20
C)  23
D)  61
E)  64F) None of the above
G) A) and B)

Question 12

After the peptide bond forms, what will happen?

Accepted Answer

A)  tRNA A will be carrying the polypeptide and it will shift to the P site.
B)  tRNA A will be carrying the polypeptide and it will shift to the A site.
C)  tRNA B will be carrying the polypeptide and it will shift to the P site.
D)  tRNA B will be carrying the polypeptide and it will shift to the A site.
E)  Ribosome disassembles to release the tRNAs and allow new tRNA to enter.F) C) and E)
G) All of the above

Question 13

If the bottom strand of the DNA serves as the template, the amino acid sequence of the protein produced from the RNA would be:

Accepted Answer

A)  MET-LEU-SER.
B)  ARG-VAL-HIS.
C)  THR-ILE-PHE.
D)  PRO-GLY-TRP.
E)  LYS-VAL-HIS.F) D) and E)
G) B) and C)

Question 14

If the sequence contains 4 nucleotides (4-nu long) , how many different nucleotide sequences can be encoded by it?

Accepted Answer

A)  16
B)  24
C)  64
D)  128
E)  256F) A) and B)
G) A) and C)

Question 15

During initiation, the _____ subunit is the first part of the ribosome to associate with the mRNA.

Accepted Answer

A)  small
B)  large
C)  intermediary
D)  secondary
E)  tertiaryF) A) and E)
G) B) and D)

Question 16

If the bottom strand of the DNA is the template, the tRNA anticodon sequence, left to right 5' to 3', for the first RNA codon is:

Accepted Answer

A)  GGA.
B)  AUG.
C)  CAC.
D)  UCC.
E)  CCU.F) A) and E)
G) B) and E)

Question 17

Where does variation exist in the general structure of the amino acid?

Accepted Answer

A)  Amino group
B)  Carboxyl group
C)  R group
D)  Central carbon
E)  HydrogenF) C) and E)
G) C) and D)

Question 18

The amino acids in proteins are joined together by _____ bonds.

Accepted Answer

A)  peptide
B)  hydrogen
C)  ionic
D)  acetyl
E)  oxygenF) A) and E)
G) C) and D)

Question 19

For a sequence of nucleotides, how many reading frames are possible?

Accepted Answer

A)  One
B)  Two
C)  Three
D)  Six
E)  TenF) A) and B)
G) C) and D)

Question 20

Which of the following is observed in prokaryotes but not in eukaryotes?

Accepted Answer

A)  UGG is an example of a stop codon only found in prokaryotes.
B)  An mRNA can be translated by only one ribosome at a time in prokaryotes.
C)  The 5' end of a prokaryotic mRNA can be translated while the 3'end is still being transcribed.
D)  Translation does not require any protein factors in prokaryotes.
E)  In prokaryotes, ribosomes move along an mRNA in the 3' to 5' direction.F) A) and B)
G) A) and C)

Exam 11: From DNA to Protein- Translation

During initiation, the _____ subunit is the first part of the ribosome to associate with the mRNA.

Correct AnswerverifiedShow Answer

After the peptide bond forms, what will happen?

Correct AnswerverifiedShow Answer

Which amino acids are encoded if the reading frame is as shown below, starting from the correct end? 5' ...GGAGCUCGUUGUAUU...3'

Correct AnswerverifiedGLY-ALA-AR...View AnswerShow Answer

Which codon from the list below, codes a different amino acid than the others?

Correct AnswerverifiedShow Answer

If the bottom strand of the DNA is the template, the tRNA anticodon sequence, left to right 5' to 3', for the first RNA codon is:

Correct AnswerverifiedShow Answer

The amino acids in proteins are joined together by _____ bonds.

Correct AnswerverifiedShow Answer

Codons that specify the same amino acid are said to be:

Correct AnswerverifiedShow Answer

Can a human gene sequence be transcribed and translated inside an E.coli cell (assume it has a functional promoter sequence) ?

Correct AnswerverifiedShow Answer

Where does variation exist in the general structure of the amino acid?

Correct AnswerverifiedShow Answer

There are _____ different codons, which encode 20 amino acids and three stop codons.

Correct AnswerverifiedShow Answer

If the sequence contains 4 nucleotides (4-nu long) , how many different nucleotide sequences can be encoded by it?

Correct AnswerverifiedShow Answer

During elongation, an incoming charged tRNA enters at the _____ site of the ribosome.

Correct AnswerverifiedShow Answer

Which of the following is observed in prokaryotes but not in eukaryotes?

Correct AnswerverifiedShow Answer

What level of protein structure is expressed in the following: VAL-LYS-GLY?

Correct AnswerverifiedShow Answer

For a sequence of nucleotides, how many reading frames are possible?

Correct AnswerverifiedShow Answer

Which of the following is NOT required during the process of tRNA charging?

Correct AnswerverifiedShow Answer

How many different amino acid sequences can be encoded by the sequence of 9 nucleotides long (ignore the possibility of stop codons) ?

Correct AnswerverifiedShow Answer

If the bottom strand of the DNA serves as the template, the amino acid sequence of the protein produced from the RNA would be:

Correct AnswerverifiedShow Answer

The amino acid sequence of a polypeptide is referred to as the _____ sequence of the polypeptide.

Correct AnswerverifiedShow Answer

How many reading frames are encoded by the sense nucleotide strand?

Correct AnswerverifiedShow Answer

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GLY-ALA-AR...
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