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Molecular Basis of Inheritance · Question 71

NEET 2017MCQEasy📈 Topic in 50% papers+4−1
1

The final proof for DNA as the genetic material came from the experiments of

  1. Griffith
  2. Hargobind Khorana
  3. Avery, MacLeod and McCarty
  4. Hershey and Chase

Answer

(4) Hershey and Chase

Solution

⇒ Griffith (1928) showed transformation but could not identify the transforming principle.

⇒ Avery, MacLeod and McCarty (1933–44) showed DNA is the transforming principle, but not all biologists were convinced.

As per NCERT, the unequivocal proof that DNA is the genetic material came from the experiments of Alfred Hershey and Martha Chase (1952) using bacteriophages with radioactive 32P (DNA) and 35S (protein).

Answer: (4)

NEET 2017

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2

If there are 999 bases in an RNA that codes for a protein with 333 amino acids, and the base at position 901 is deleted such that the length of the RNA becomes 998 bases, how many codons will be altered ?

  1. 1
  2. 11
  3. 333
  4. 33
NEET 2017
3

During DNA replication, Okazaki fragments are used to elongate

  1. The leading strand away from replication fork
  2. The lagging strand towards replication fork
  3. The lagging strand away from the replication fork
  4. The leading strand towards replication fork
NEET 2017
4

Which of the following RNAs should be most abundant in animal cell ?

  1. m-RNA
  2. mi-RNA
  3. r-RNA
  4. t-RNA
NEET 2017
5

Spliceosomes are not found in cells of :

  1. Bacteria
  2. Plants
  3. Animals
  4. Fungi
NEET 2017
6

The association of histone H1 with a nucleosome indicates :

  1. DNA replication is occurring
  2. Transcription is occurring
  3. The DNA is condensed into a Chromatin Fibre
  4. The DNA double helix is exposed
NEET 2017
7

Which one of the following is the starter codon ?

  1. AUG
  2. UAG
  3. UAA
  4. UGA
NEET 2016 (Phase 1)
8

Which of the following is required as inducer(s) for the expression of Lac operon?

  1. lactose
  2. lactose and galactose
  3. glucose
  4. galactose
NEET 2016 (Phase 1)
9

A complex of ribosomes attached to a single strand of RNA is known as :

  1. Polypeptide
  2. Okazaki fragment
  3. Polysome
  4. Polymer
NEET 2016 (Phase 1)
10

Which of the following is not required for any of the techniques of DNA fingerprinting available at present?

  1. DNA – DNA hybridization
  2. Polymerase chain reaction
  3. Zinc finger analysis
  4. Restriction enzymes
NEET 2016 (Phase 1)
11

Taylor conducted the experiments to prove semiconservative mode of chromosome replication on

  1. Vicia faba
  2. Drosophila melanogaster
  3. Vinca rosea
  4. E. coli
NEET 2016 (Phase 2)

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