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Genetics MCQ

87 MCQ questions with answers and explanations · page 3 of 4

Test yourself▶ 25 question test▶ 50 question test

Q51. Who proved that DNA is the basic genetic material ?

  1. AGriffith
  2. BWatson
  3. CBoveri and sutton
  4. DHershey and Chase
Show answer & explanation

Answer: D) Hershey and Chase

Q52. The hydropillic nature of DNA is due to the presence of :

  1. AA Nnumber of hydrogrn
  2. BPhosphate group
  3. CDeoxyribose suger
  4. DThymine base
Show answer & explanation

Answer: B) Phosphate group

Q53. Circular DNA is present in-

  1. AE.R and Ribosomes
  2. BRibosomes and chloroplastes
  3. CRibosomes and mitochondria
  4. DMitochondria and chloroplasts
Show answer & explanation

Answer: D) Mitochondria and chloroplasts

Q54. Nucleic acids are made of-

  1. ANucleotides
  2. BNucleosides
  3. CAmino acids
  4. DProtein
Show answer & explanation

Answer: A) Nucleotides

Q55. Coded information in nucleic acid depend upon-

  1. AArrangement of nucleotides
  2. BPosition of nucleotides
  3. CNumber of nucleotides
  4. DAll of above
Show answer & explanation

Answer: A) Arrangement of nucleotides

Q56. Nucleotide base present in DNA and not RNA is-

  1. ACytosin
  2. BUracil
  3. CThymine
  4. DGuanine
Show answer & explanation

Answer: C) Thymine

Q57. RNA contains-

  1. AHexose
  2. BRibose
  3. CFructose
  4. DGlucose
Show answer & explanation

Answer: B) Ribose

Q58. DNA fingerprinting is a technique used for the detection of -

  1. AAlzheimer's disease
  2. BDisputed parentage
  3. CAIDS
  4. DYellow fever
Show answer & explanation

Answer: B) Disputed parentage

Q59. Which one of the following is not a genetic disease in human beings ?

  1. AHuntington's chorea
  2. BPhenylketonuria
  3. CRheumatic heart disease
  4. DTay-Sach's disease
Show answer & explanation

Answer: C) Rheumatic heart disease

Q60. Which one of following is a hereditary disease ?

  1. ACataract
  2. BHaemophilia
  3. CPellagra
  4. DOsteoporosisi
Show answer & explanation

Answer: B) Haemophilia

Q61. Which one of the following statements is correct ?nCretinism is human disorder which is due to the under secretion of-

  1. AAdrenalin hormone
  2. BCortisone hormone
  3. CGlucagon hormone
  4. DThyroxin hormone
Show answer & explanation

Answer: D) Thyroxin hormone

Q62. Differentiation of organs and tissues in a developing organism is associated with-

  1. ADifferential expression of genes
  2. BDevelopment mutations
  3. CDelation of genes
  4. DLethal mutation
Show answer & explanation

Answer: A) Differential expression of genes

Q63. Nucleosome contains-

  1. AOnly histones
  2. BBoth DNA and histones
  3. COnly DNA
  4. DBoth DNA and RNA
Show answer & explanation

Answer: B) Both DNA and histones

Q64. Reverse transcription was discovered by-

  1. AWatson and Crick
  2. BHargovind Khurana
  3. CLemin & Baltimore
  4. DBeadle & Tatum
Show answer & explanation

Answer: C) Lemin & Baltimore

Q65. Process in which part of a DNA bacterial cell is transferred to another through virus is-

  1. AReproduction
  2. BConjugation
  3. CTransduction
  4. DTransformation
Show answer & explanation

Answer: C) Transduction

Q66. Nucleic acid occur in-

  1. AViruses
  2. BBacteria
  3. CMammal
  4. DAll form of life
Show answer & explanation

Answer: D) All form of life

Q67. Smallest part of DNA that undergoes recombination is :

  1. AMuton
  2. BCistron
  3. CReplicon
  4. DRecon
Show answer & explanation

Answer: D) Recon

Q68. DNA strand have-

  1. AQuaternary structure
  2. BSame polarity
  3. CAntiparallel
  4. DDisulphide bond
Show answer & explanation

Answer: C) Antiparallel

Q69. Gene is :

  1. AParticular DNA segment which determines heredity of a particular trait
  2. BHalf DNA segment of somatic cells
  3. CWhole DNA
  4. DHalf DNA segment
Show answer & explanation

Answer: A) Particular DNA segment which determines heredity of a particular trait

Q70. The gene which exhibits effects is known as-

  1. APolygene
  2. BPseudogene
  3. CPleiotropic
  4. DComplementary
Show answer & explanation

Answer: C) Pleiotropic

Q71. Which one of the following techniques can be used to establish the paternity of a child?

  1. AProtein analysis
  2. BQuantitative analysis of DNA
  3. CChromosome counting
  4. DDNA finger printing
Show answer & explanation

Answer: D) DNA finger printing

Q72. Haemophilia is a genetic disorder which lead to-

  1. ADecrease in haemoglobine level
  2. BRheumatic heart disease
  3. CDecrease in WBC
  4. DNon-clotting of blood
Show answer & explanation

Answer: D) Non-clotting of blood

Q73. Which one of the following genetic disease is sex-linked ?

  1. ARoyal haemophilia
  2. BTay-sachs disease
  3. CCystic fibrosis
  4. DHypertension
Show answer & explanation

Answer: A) Royal haemophilia

Q74. Insect resistant cotton plant have been genetically engineered by inserting a gene from a-

  1. AVirus
  2. BBacterium
  3. CInsect
  4. DPlant
Show answer & explanation

Answer: B) Bacterium

Q75. When one gene controls two or more different characters simultaneously, the phenomena is called-

  1. AApomixis
  2. BPleiotropy
  3. CPalyploidy
  4. DPalyteny
Show answer & explanation

Answer: B) Pleiotropy

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