Molecular Biology and Genetics MCQs | Page - 4

Dear candidates you will find MCQ questions of Molecular Biology and Genetics here. Learn these questions and prepare yourself for coming examinations and interviews. You can check the right answer of any question by clicking on any option or by clicking view answer button.

Q. Rho-dependent and rho-independent transcription termination mechanisms operate in prokaryotes. Rho independent termination mechanism involves

  • (A) Binding of the rho protein upstream of the termination element
  • (B) No protein factors and only RNA secondary structure and run of 'U's
  • (C) Presence of UGA or UAA stop codons
  • (D) Binding of accessory factors at termination signal
💬 Discuss
✅ Correct Answer: (B) No protein factors and only RNA secondary structure and run of 'U's

Published by Mr. Dubey ⭐ 109.87K Points at 14-Jun-2020 11:59 am in Molecular Biology and Genetics

Q. The direction of shell coiling in the snail Limnaea peregra is a classic example of

  • (A) Chromosomal inheritance
  • (B) Extra-chromosomal inheritance
  • (C) Chromosomal translocation
  • (D) Homologous recombination
💬 Discuss
✅ Correct Answer: (B) Extra-chromosomal inheritance

Published by Mr. Dubey ⭐ 109.87K Points at 14-Jun-2020 11:59 am in Molecular Biology and Genetics

Q. The protein in eukaryotes which is subjected to degradation undergoes

  • (A) Phosphorylation
  • (B) Carboxylation
  • (C) Ubiquitation
  • (D) Methylation
💬 Discuss
✅ Correct Answer: (C) Ubiquitation

Published by Mr. Dubey ⭐ 109.87K Points at 14-Jun-2020 11:59 am in Molecular Biology and Genetics

Q. In mismatch correction repair, the parental DNA strand is distinguished from the daughter strand by

  • (A) Acetylation
  • (B) Phosphorylation
  • (C) Methylation
  • (D) Glycosylation
💬 Discuss
✅ Correct Answer: (C) Methylation

Published by Mr. Dubey ⭐ 109.87K Points at 14-Jun-2020 11:59 am in Molecular Biology and Genetics

Q. Which one of the following is coded by the ABO blood group locus in the human genome?

  • (A) Acyl transferase
  • (B) Galactosyltransferase
  • (C) Transposase
  • (D) β-Galactosidase
💬 Discuss
✅ Correct Answer: (B) Galactosyltransferase

Published by Mr. Dubey ⭐ 109.87K Points at 14-Jun-2020 11:59 am in Molecular Biology and Genetics

Q. A protein is phosphorylated at a serine residue. A phosphomimic mutant of the protein can be generated by substituting that serine with

  • (A) Glycine
  • (B) Alanine
  • (C) Aspartate
  • (D) Threonine
💬 Discuss
✅ Correct Answer: (C) Aspartate

Published by Mr. Dubey ⭐ 109.87K Points at 14-Jun-2020 11:59 am in Molecular Biology and Genetics

Q. Under alkaline conditions, DNA is more stable than RNA because

  • (A) RNA forms secondary structures
  • (B) RNA is a single stranded molecule
  • (C) RNA has uracil in place of thymidine
  • (D) RNA is susceptible to hydrolysis
💬 Discuss
✅ Correct Answer: (D) RNA is susceptible to hydrolysis

Published by Mr. Dubey ⭐ 109.87K Points at 14-Jun-2020 11:59 am in Molecular Biology and Genetics

Q. True breeding Drosophila flies with curved wings and dark bodies were mated with true breeding short wings and tan body Drosophila, The F1 progeny was observed to be with curved wings and tan body. The F1 progeny was again allowed to breed and produced flies of the following phenotype, 45 curved wings tan body, 15 short wings tan body, 16 curved wings dark body and, 6 short wings dark body. The mode of inheritance is

  • (A) Typical Mendelian with curved wings and tan body being dominant
  • (B) Typical non-Mendelian with curved wings and tan body not following any pattern
  • (C) Mendelian with suppression of phenotypes
  • (D) Mendelian with single crossover
💬 Discuss
✅ Correct Answer: (A) Typical Mendelian with curved wings and tan body being dominant

Published by Mr. Dubey ⭐ 109.87K Points at 14-Jun-2020 11:59 am in Molecular Biology and Genetics

Q. The enzyme which adds phosphate group to the free 5' terminus of a DNA sequence is

  • (A) Adenosine kinase
  • (B) Alkaline phosphatase
  • (C) Polynucleotide kinase
  • (D) Terminal deoxynucleotidyl transferase
💬 Discuss
✅ Correct Answer: (C) Polynucleotide kinase

Published by Mr. Dubey ⭐ 109.87K Points at 14-Jun-2020 11:59 am in Molecular Biology and Genetics

Q. The fundamental feature of the genetic code which allows the expression of a protein in any host is its

  • (A) Triplet nature
  • (B) Universality
  • (C) Degeneracy
  • (D) Redundancy
💬 Discuss
✅ Correct Answer: (B) Universality

Published by Mr. Dubey ⭐ 109.87K Points at 14-Jun-2020 11:59 am in Molecular Biology and Genetics

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