Nucleic Acid Structure(Microbiology ) Questions and Answers

Question 1. In DNA sequencing, the primer
  1.    generates variety of different sized fragments
  2.    both (a) and (b)
  3.    specifies where the sequence begins
  4.    specifies where the sequence ends
Explanation:-
Answer: Option C. -> specifies where the sequence begins
Question 2. In which of the following uracil is present?
  1.    DNA
  2.    RNA
  3.    Both (a) and (b)
  4.    None of these
Explanation:-
Answer: Option B. -> RNA
Question 3. Guanine always binds to
  1.    thymine
  2.    none of these
  3.    cytosine
  4.    guanine
Explanation:-
Answer: Option C. -> cytosine
Question 4. To which of the following adenine always binds?
  1.    None of these
  2.    Cytosine
  3.    Thymine
  4.    Guanine
Explanation:-
Answer: Option C. -> Thymine
Question 5. The chromosome of almost all bacteria is in the shape of
  1.    a linear chromosome
  2.    an open circle
  3.    helix
  4.    a closed circle
Explanation:-
Answer: Option D. -> a closed circle
Question 6. The function of ribosomes within the cell is
  1.    to ferment carbohydrates
  2.    all of these
  3.    to produce ATP
  4.    to synthesize proteins
Explanation:-
Answer: Option D. -> to synthesize proteins
Question 7. According to base pairing rules the bases of one strand match-up with the bases of the second strand of DNA and the two strands are said to be
  1.    identical
  2.    oppositely charged
  3.    complementary
  4.    none of these
Explanation:-
Answer: Option C. -> complementary
Question 8. Which is not an essential part of a two-component phosphorelay system?
  1.    Response regulator
  2.    None of these
  3.    Autoinducer
  4.    Sensor kinase
Explanation:-
Answer: Option C. -> Autoinducer
Question 9. RNA that is complementary to a segment of another RNA molecule to which it will bind is known as
  1.    missense RNA
  2.    none of these
  3.    nonsense RNA
  4.    antisense RNA
Explanation:-
Answer: Option D. -> antisense RNA
Question 10. The DNA that actually codes for a protein's primary structure in eukaryotes is
  1.    the promoter
  2.    portions of the gene called exons
  3.    portions of the gene called introns
  4.    the entire gene
Explanation:-
Answer: Option B. -> portions of the gene called exons
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