Nucleic Acids(Biochemistry ) Questions and Answers

Question 1. Which of the following nucleotides is not present in DNA?
  1.    AMP
  2.    GMP
  3.    CMP
  4.    UMP
Explanation:-
Answer: Option D. -> UMP
Answer: (d).UMP
Question 2. Which of the following involves carrying genetic information from DNA for protein synthesis?
  1.    m-RNA
  2.    t-RNA
  3.    r-RNA
  4.    sn-RNA
Explanation:-
Answer: Option A. -> m-RNA
Answer: (a).m-RNA
Question 3. Fatty acids which must be obtained from food are called as
  1.    non-essential fatty acids
  2.    saturated fatty acids
  3.    unsaturated fatty acids
  4.    essential fatty acids
Explanation:-
Answer: Option D. -> essential fatty acids
Answer: (d).essential fatty acids
Question 4. Which of the following is false?
  1.    RNA does not obey Chargaff’s rule
  2.    DNAs can be identified by Orcinol color reaction
  3.    In RNA OH group is present at 2’ position
  4.    Alkali hydrolyses RNA to 2’3’-cyclic diesters
Explanation:-
Answer: Option B. -> DNAs can be identified by Orcinol color reaction
Answer: (b).DNAs can be identified by Orcinol color reaction
Question 5. Naturally occurring fatty acids have number of carbon atoms in range
  1.    15-Oct
  2.    28-Dec
  3.    30-40
  4.    50-100
Explanation:-
Answer: Option B. -> 28-Dec
Answer: (b).28-Dec
Question 6. Fatty acids are usually derived from
  1.    triglycerides
  2.    phospholipids
  3.    both a and b
  4.    Proteins
Explanation:-
Answer: Option C. -> both a and b
Answer: (c).both a and b
Question 7. Nucleic acids are made up of monomers called
  1.    nucleotides
  2.    nucleosides
  3.    DNA
  4.    RNA
Explanation:-
Answer: Option A. -> nucleotides
Answer: (a).nucleotides
Question 8. Carboxylic acid with a long aliphatic chain is termed as
  1.    protein
  2.    carbohydrate
  3.    fatty acid
  4.    vitamin
Explanation:-
Answer: Option C. -> fatty acid
Answer: (c).fatty acid
Question 9. If the sugar in nucleic acid is deoxyribose, than polymer is
  1.    RNA
  2.    DNA
  3.    NADP
  4.    NADPH
Explanation:-
Answer: Option B. -> DNA
Answer: (b).DNA
Question 10. RNA molecules exist as
  1.    double stranded molecules
  2.    single stranded molecules
  3.    sheets
  4.    Globular form
Explanation:-
Answer: Option B. -> single stranded molecules
Answer: (b).single stranded molecules
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