Question 1

The complementary base that hydrogen bonds with thymine in a DNA double helix is ________.

Accepted Answer

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

Question 2

________ is the enzyme that copies DNA during DNA replication. Thermostabile forms of this enzyme are essential for PCR.

Accepted Answer

A)  RNA polymerase 
B)  DNA ligase 
C)  DNA polymerase 
D)  RNA primase 
E)  DNA helicase

Question 3

Which of the following is a structural feature of DNA but not RNA?

Accepted Answer

A)  Single-stranded 
B)  Containing the nitrogenous base adenine 
C)  Containing phosphate groups 
D)  Containing deoxyribose sugars 
E)  Containing the nitrogenous base uracil

Question 4

Which type of point mutation creates a stop codon in a gene?

Accepted Answer

A)  Nonsense 
B)  Frameshift 
C)  Silent 
D)  Missense 
E)  None of these choices

Question 5

What is synthesis of RNA from a DNA template called?

Accepted Answer

A)  Transformation 
B)  Reverse transcription 
C)  Transcription 
D)  Translation 
E)  None of these choices

Question 6

What is the difference between acquired and inherited mutations?

Accepted Answer

The answer of What is the difference between acquired and...

Question 7

Which type of base-pair substitution mutation has no effect on the amino acid sequence of a protein?

Accepted Answer

A)  Missense mutation 
B)  Nonsense mutation 
C)  Silent mutation 
D)  Frameshift mutation 
E)  None of these choices

Question 8

Which of the following sequences is most commonly found at eukaryotic promoters?

Accepted Answer

A)  TATAAT 
B)  Poly(
A)  tail 
C)  7-methyl G cap 
D)  5'-GU . . . AG-3' 
E)  Shine-Dalgarno sequence

Question 9

Give three differences between DNA and RNA.

Accepted Answer

The answer of Give three differences between DNA and RNA....

Question 10

Another term for a triplet code is ________.

Accepted Answer

A)  an enhancer 
B)  a promoter 
C)  tRNA 
D)  a factor 
E)  a codon

Exam 2: An Introduction to Genes and Genomes