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Molecular Basis of Inheritance

NEET 2018MCQEasy📈 Topic in 25% papers+4−1
Ques. 1NEET 2018

Select the correct match :

  1. Ribozyme - Nucleic acid
  2. F2 Recessive parent - Dihybrid cross
  3. T.H. Morgan - Transduction
  4. G. Mendel - Transformation

Answer

(1) Ribozyme - Nucleic acid

Solution

A ribozyme is an RNA that acts as an enzyme (e.g., 23S rRNA acting as peptidyl transferase in bacteria), so it is a nucleic acid. (1) is correct.

(2) A cross of F1 with the recessive parent is a test cross, not a dihybrid cross.

(3) T.H. Morgan is known for linkage and recombination; transduction was discovered by Zinder and Lederberg.

(4) G. Mendel gave the laws of inheritance; transformation was discovered by Frederick Griffith.

Answer: (1)

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Ques. 2NEET 2018

Many ribosomes may associate with a single mRNA to form multiple copies of a polypeptide simultaneously. Such strings of ribosomes are termed as

  1. polysome
  2. polyhedral bodies
  3. plastidome
  4. nucleosome
Ques. 3NEET 2018

AGGTATCGCAT is a sequence from the coding strand of a gene. What will be the corresponding sequence of the transcribed mRNA?

  1. AGGUAUCGCAU
  2. UGGTUTCGCAT
  3. ACCUAUGCGAU
  4. UCCAUAGCGUA
Ques. 4NEET 2018

All of the following are part of an operon except

  1. an operator
  2. structural genes
  3. an enhancer
  4. a promoter
Ques. 5NEET 2017

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
Ques. 6NEET 2017

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
Ques. 7NEET 2017

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
Ques. 8NEET 2017

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

  1. m-RNA
  2. mi-RNA
  3. r-RNA
  4. t-RNA
Ques. 9NEET 2017

Spliceosomes are not found in cells of :

  1. Bacteria
  2. Plants
  3. Animals
  4. Fungi
Ques. 10NEET 2017

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
Ques. 11NEET 2016 (Phase 1)

Which one of the following is the starter codon ?

  1. AUG
  2. UAG
  3. UAA
  4. UGA

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