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Home Biochemistry Nucleic Acids Comments

  • Question
  • A nucleotide consists of


  • Options
  • A. a sugar, a base and a phosphate
  • B. a sugar and a phosphate
  • C. paired bases
  • D. a sugar, a base and three phosphates

  • Correct Answer
  • a sugar, a base and a phosphate 


  • Nucleic Acids problems


    Search Results


    • 1. Nucleotide bases and aromatic amino acids absorb light respectively at

    • Options
    • A. 280 and 260 nm
    • B. 260 and 280 nm
    • C. 270 and 280 nm
    • D. 260 and 270 nm
    • Discuss
    • 2. The unfavourable free energy associated with not satisfying a hydrogen bond after formation of the double helix is approximately

    • Options
    • A. 10 kJ/mol
    • B. 20 kJ/mol
    • C. 25 kJ/mol
    • D. 30 kJ/mol
    • Discuss
    • 3. Because DNA is a highly charged polyanion, its stability to heat denaturation

    • Options
    • A. does not depend on hydrophobic interactions
    • B. increases with increasing salt
    • C. is independent of G - C content
    • D. decreases with increasing salt
    • Discuss
    • 4. A purine with an amine (NH2) group on the 6th carbon is

    • Options
    • A. adenine
    • B. cytosine
    • C. thymine
    • D. guanine
    • Discuss
    • 5. In gel electrophoresis, what fragments will move most quickly through a gel?

    • Options
    • A. Large fragments
    • B. Small fragments
    • C. Large genome
    • D. None of these
    • Discuss
    • 6. Which of the following is a purine?

    • Options
    • A. Cytosine
    • B. Adenine
    • C. Thymine
    • D. Uracil
    • Discuss
    • 7. A five carbon sugar lacking a hydrogen at the number 2 carbon is found in

    • Options
    • A. DNA
    • B. RNA
    • C. mRNA
    • D. rDNA
    • Discuss
    • 8. Which of the following is found on RNA but not DNA?

    • Options
    • A. Uracil
    • B. Deoxyribose
    • C. Phosphate
    • D. Adenine
    • Discuss
    • 9. Which pyrimidine base contains an amino group at carbon 4?

    • Options
    • A. Cytosine
    • B. Thymine
    • C. Uracil
    • D. Adenine
    • Discuss
    • 10. Nucleic acids can be analyzed experimentally by their

    • Options
    • A. molecular weight
    • B. absorption of visible light
    • C. absorption of uv light
    • D. none of these
    • Discuss


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