Multiple Choice Questions

In a nucleotide, the nitrogenous base is attached to the sugar's _____ carbon and the phosphate group is attached to the sugar's _____ carbon.
  • 1'...5'
  • thymine...cytosine
  • nuclease
  • 5' to 3'
After DNA replication is completed, _____.
  • It exists as chromatin and is less condensed than mitotic chromosomes.
  • Each new double helix consists of one old and one new strand.
  • each new DNA double helix consists of one old DNA strand and one new DNA strand
  • It untwists the double helix and separates the two DNA strands
The action of helicase creates _____.
  • nucleotide excision repair
  • RNA primer complementary to a preexisting DNA strand
  • It untwists the double helix and separates the two DNA strands
  • replication forks and replication bubbles
The first step in the replication of DNA is catalyzed by _____.
  • nuclease
  • template
  • ligase
  • helicase
In a DNA double helix an adenine of one strand always pairs with a(n) _____ of the complementary strand, and a guanine of one strand always pairs with a(n) _____ of the complementary strand.
  • telomeres
  • 1'...5'
  • thymine...cytosine
  • template
In nucleotide excision repair, damaged DNA is excised by what enzyme(s)?
  • template
  • ligase
  • helicase
  • nuclease
The synthesis of a new strand begins with the synthesis of a(n) _____.
  • DNA polymerase can assemble DNA only in the 5' to 3' direction
  • DNA is usually double-stranded, whereas RNA is usually single-stranded.
  • RNA primer complementary to a preexisting DNA strand
  • Each new double helix consists of one old and one new strand.
What is the function of helicase in DNA replication?
  • It exists as chromatin and is less condensed than mitotic chromosomes.
  • DNA polymerase can assemble DNA only in the 5' to 3' direction
  • DNA is usually double-stranded, whereas RNA is usually single-stranded.
  • It untwists the double helix and separates the two DNA strands
DNA replication is said to be semiconservative. What does this mean?
  • RNA primer complementary to a preexisting DNA strand
  • It untwists the double helix and separates the two DNA strands
  • Each new double helix consists of one old and one new strand.
  • each new DNA double helix consists of one old DNA strand and one new DNA strand
Which of these is a difference between a DNA and an RNA molecule?
  • DNA polymerase can assemble DNA only in the 5' to 3' direction
  • It exists as chromatin and is less condensed than mitotic chromosomes.
  • DNA is usually double-stranded, whereas RNA is usually single-stranded.
  • thymine
Which of these nitrogenous bases is found in DNA but not in RNA?
  • telomeres
  • helicase
  • thymine
  • DNA is usually double-stranded, whereas RNA is usually single-stranded.
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Multiple Choice Questions
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