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Nucleic Acid Structure problems

  • 1. Guanine always binds to

  • Options
  • A. cytosine
  • B. guanine
  • C. thymine
  • D. none of these
    • Discuss
  • 2. 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

  • Options
  • A. complementary
  • B. oppositely charged
  • C. identical
  • D. none of these
    • Discuss
  • 3. Stem and loop structures are

  • Options
  • A. proteins that help partially denatured enzymes to recover their native configuration
  • B. structures in DNA caused by inverted repeats
  • C. structures at the ends of linear eukaryotic DNA molecules
  • D. the bonds between adjacent DNA nucleotides in the same strand
    • Discuss
  • 4. The chromosome of almost all bacteria is in the shape of

  • Options
  • A. an open circle
  • B. helix
  • C. a closed circle
  • D. a linear chromosome
    • Discuss
  • 5. In which of the following uracil is present?

  • Options
  • A. RNA
  • B. DNA
  • C. Both (a) and (b)
  • D. None of these
    • Discuss
  • 6. To which of the following adenine always binds?

  • Options
  • A. Guanine
  • B. Cytosine
  • C. Thymine
  • D. None of these
    • Discuss
  • 7. In DNA sequencing, the primer

  • Options
  • A. specifies where the sequence ends
  • B. specifies where the sequence begins
  • C. both (a) and (b)
  • D. generates variety of different sized fragments
    • Discuss
  • 8. Which is not an essential part of a two-component phosphorelay system?

  • Options
  • A. Response regulator
  • B. Sensor kinase
  • C. Autoinducer
  • D. None of these
    • Discuss
  • 9. The function of ribosomes within the cell is

  • Options
  • A. to produce ATP
  • B. to ferment carbohydrates
  • C. to synthesize proteins
  • D. all of these
    • Discuss
  • 10. The DNA that actually codes for a protein's primary structure in eukaryotes is

  • Options
  • A. the entire gene
  • B. portions of the gene called introns
  • C. portions of the gene called exons
  • D. the promoter
    • Discuss

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