Biotechnology Questions-1

NEET PG NEET PG MCQs
#1

  1. In a DNA molecule cytosine is 18%. Percentage of adenine would be
    (a) 32%
    (b) 64%
    © 36%
    (d) 18% Answer: (a)

  2. In AGCT of DNA hydrogen bonds and base pairings occur between
    (a) A-U, C-G
    (b) A-C, G-T
    © A-G,C-T
    (d) A-T,C-G Answer: (d)

  3. In callus culture, roots can be induced by the supply of
    (a) Auxin and no cytokinin
    (b) Higher concentration of auxin and lower concentration of cytokinin
    © Higher concentration of cytokinin and lower concentration of auxin
    (d) Both auxin and cytokinin in equal proportions. Answer: (b)

  4. In DNA, adenine pairs with
    (a) Guanine
    (b) Thymine
    © Cytosine
    (d) Uracil Answer: (b)

  5. In DNA, guanine lies opposite
    (a) Uracil
    (b) Cytosine
    © Adenine
    (d) thymine Answer: (b)

  6. In double helix of DNA, the two DNA strands are
    (a) Coiled around a common axis
    (b) coiled around each other
    © coiled differently
    (d) Colied over protein sheath Answer: (a)

  7. In RNA, thymine is replaced by
    (a) Adenine
    (b) Guanine
    © Cytosine
    (d) Uracil Answer: (d)

  8. In tissue / bacterial culture glassware and nutrients are sterilized through
    (a) Water bath at 200° C
    (b) Dry air oven at 200° C
    © Dehumidifire
    (d) Autoclave Answer: (d)

  9. In tissue culture, callus can be induced to form shoot or root by altering the ratio of
    (a) Auxin to cytokinin
    (b) Cytokinin to ethylene
    © Auxin to gibberellin
    (d) Gibberellin to cytokinin Answer: (a)

  10. Initiation codon of protein synthesis (in eucaryotes) is
    (a) GUA
    (b) GCA
    © CCA
    (d) AUG Answer: (d)

  11. Introduction of foreign genes for improving genotype is
    (a) Tissue culture
    (b) Immunisation
    © Biotechnology
    (d) Genetic engineering Answer: (b)

  12. It is now possible to breed plants and animals with desired characters through
    (a) Genetic engineering
    (b) Chromosome engineering
    © Ikebana technique
    (d) Bonsia technique Answer: (a)

  13. Most abundant RNA of the cell of
    (a) tRNA
    (b) rRNA
    © mRNA
    (d) tRNA Answer: (b)

  14. Nitrogen bases of DNA are
    (a) ATUC
    (b) UTGC
    © ATGC
    (d) AUGC Answer: ©

  15. Nonsense codon takes part in
    (a) Terminating message of gene controlled protein synthesis
    (b) Formation of unspecified amino acids
    © Conversion of sense DNA into non-sense one
    (d) Releasing tRNA from polypeptide chain Answer: (a)

  16. Nucleosides are
    (a) Sugar + Phosphoric acid
    (b) Purine / Pyrimidine + Sugar + Phosphate
    © Purine / Pyrimidine + Phosphoric acid
    (d) Purine / Pyrimidine + Sugar Answer: (d)

  17. Nucleotides present in one turn of DNA helix
    (a) 4
    (b) 8
    © 10
    (d) 9 Answer: ©

  18. Okazaki segments are formed during
    (a) Transduction
    (b) Transcription
    © Replication
    (d) Translation Answer: ©

  19. Plants developed in vitro culture from pollen grains are
    (a) Androgenic plants
    (b) Pollen plants
    © Male plants
    (d) Sterile plants Answer: (a)

  20. Plasmids are vectors for gene cloning because they
    (a) Self replicate in bacterial cells
    (b) Replicate freely outside bacterial cells
    © Can be multiplied in culture
    (d) Can be multiplied in laboratories using enzymes Answer: (a)