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Molecular Basis of Inheritance

Board » Bihar Board » Class 12th » English Medium » Science » Biology » L-6 : Molecular Basis of Inheritance

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ID- 2690
BSEB, 2020 (A)

1. Which one of the following in mobile genetic elements?

  • (A) Split gene
  • (B) Transposon
  • (C) Jumping gene
  • (D) Both (B) and (C)
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ID- 2691
BSEB, 2019 (C)

2. Lac operon consists of how many structural ganes?

  • (A) 1 (a)
  • (B) 2 (y and z)
  • (C) 3 (z, y and a)
  • (D) four
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ID- 2692
BSEB, 2019 (C)

3. Which among the following anticodon is meant for "GAC" condon of DNA?

  • (A) CTG
  • (B) CUG
  • (C) Both A & B
  • (D) CAG
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ID- 2693
BSEB, 2019 (C)

4. Name the genetic material in TMV (Tabacco Mosaic virus).

  • (A) DNA
  • (B) RNA single standed
  • (C) RNA double standed
  • (D) R-DNA
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ID- 2694
BSEB, 2019 (C)

5. Which type of nitrogenous bases of Purine occur in DNA and RNA?

  • (A) Adenine
  • (B) Guranine
  • (C) Both (A) and (B)
  • (D) Cytosine
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ID- 2695
BSEB, 2020 (A)

6. Which one is initiation codon?

  • (A) UAG and UGA
  • (B) AUG and GUG
  • (C) UAA and UAG
  • (D) UAA and UGA
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ID- 2696
BSEB, 2020 (A)

7. What will be the base sequence of DNA against the base sequence 'AUCGCCUGA' of RNA?

  • (A) TTGCGGACT
  • (B) TAGCGGACT
  • (C) UAGCGGACU
  • (D) TAGCCCACT
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ID- 2697
BSEB, 2020 (A)

8. The function of polymerase chain reaction is:

  • (A) Transcription
  • (B) Translation
  • (C) Both (A) and (B)
  • (D) DNA amplification
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ID- 2698
BSEB, 2013; 2016

9. The phenotypic ratio in a dihybrid cross is:

  • (A) 3 : 1
  • (B) 1 : 2 : 1
  • (C) 9 : 7
  • (D) 9 : 3 : 3 : 1
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ID- 2699
BSEB, 2013

10. Gene for hypertrichosis (having pinna) is present on:

  • (A) X-chromosome
  • (B) Y- chromosome
  • (C) Sex chromosome
  • (D) Autosome
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ID- 2700
BSEB, 2009, 2021 (A)

11. A gene pair hides the effect of another gene pair. The phenomenon is:

  • (A) Epistasis
  • (B) Dominance
  • (C) Mutation
  • (D) None of these
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ID- 2701
BSEB, 2009, 2021 (A)

12. In a DNA molecule, the cytosine is 18%. The percentage of adenine is:

  • (A) 64
  • (B) 36
  • (C) 82
  • (D) 32
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ID- 2702
BSEB, 2009

13. Which part of the donor's eye is used for grafting in order to cure certain cases of blindness?

  • (A) Lens
  • (B) Retina
  • (C) Cornea
  • (D) Choroid
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ID- 2703
BSEB, 2009

14. RNA differs from NDA in containing:

  • (A) phosphate
  • (B) ribose
  • (C) deoxyribose
  • (D) cytosine
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ID- 2726
BSEB, 2009, 2021 (A)

15. A sequence of three bases on t RNA which binds to m RNA codon is:

  • (A) triplet
  • (B) non-sense
  • (C) anticodon
  • (D) termination codon
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ID- 2727
BSEB, 2009

16. The number of linkage groups in a cell having 2n = 14 is:

  • (A) 5
  • (B) 10
  • (C) 7
  • (D) 14
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ID- 2728
BSEB, 2012, 2021 (A)

17. In which stage does crossing over take place:

  • (A) Leoptotene
  • (B) Cytokinesis
  • (C) Pachytene
  • (D) Diakinesis
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ID- 2729
BSEB, 2012

18. Nucleic acids are polymers of:

  • (A) Nucleotides
  • (B) Nucleosides
  • (C) Amino acids
  • (D) Nucleoproteins
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ID- 2730
BSEB, 2011

19. Pyrimidines present in DNA are:

  • (A) Thymine and Cytosine
  • (B) Adenine and Guanine
  • (C) Cytosine and Uracil
  • (D) Thyminie and Uracil
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ID- 2731
BSEB, 2011, 2012 (A)

20. Crossing over takes place in:

  • (A) Zygotene
  • (B) Leptotene
  • (C) Pachytene
  • (D) Metaphase
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ID- 2733
BSEB, 2010

21. Which disease is due to haemoglobin's defect?

  • (A) Down's syndrome
  • (B) Phenyl ketonuria
  • (C) Klinefelter syndrome
  • (D) Sickle cell anaemia
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ID- 2734
BSEB, 2010, 2021 (A)

22. Pyrimidines is present in RNA are:

  • (A) Cytosine and Thymine
  • (B) Adenine and Guanine
  • (C) Cytosine and Uracil
  • (D) Thymine and Uracil
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ID- 2735
BSEB, 2010

23. PCR method is useful for:

  • (A) DNA synthesis
  • (B) Protein synthesis
  • (C) Amino acids synthesis
  • (D) DNA amplification
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ID- 2737
BSEB, 2015

24. How many codons are present in inheritance codan:

  • (A) 4
  • (B) 16
  • (C) 32
  • (D) 64
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ID- 2739
BSEB, 2015, 2021 (A)

25. Operon model was proposed by:

  • (A) Waston and crick
  • (B) Nirenberg
  • (C) Jacob and Monad
  • (D) none of these
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ID- 2740

26. DNA and RNA differ by:

  • (A) Nitrogen bases and sugars
  • (B) Nitrogen bases and phosphate groups
  • (C) Number of C-atoms in sugars
  • (D) Sugar and phosphate groups
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ID- 2742

27. Triplet UUU codes for:

  • (A) Leucine
  • (B) Methionine
  • (C) Phenylalanine
  • (D) Glycine
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ID- 2744

28. Who discovered DNA polymerase:

  • (A) Okazaki
  • (B) Waston and Crick
  • (C) Meselson and Stahl
  • (D) Kornberg
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ID- 2745

29. Khorana was awarded nobel prize for:

  • (A) Discovering DNA
  • (B) Discovering RNA
  • (C) Chemical synthesis of gene
  • (D) Discovering DNA polymerase
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ID- 2747

30. A gene of an operon which forms the repressor protein is:

  • (A) Operator
  • (B) Promoter
  • (C) Regulator
  • (D) Structual
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ID- 2748
BSEB, 2011, 2013, 2021 (A)

31. Anticodon found in:

  • (A) on DNA
  • (B) on tRNA
  • (C) on rRNA
  • (D) on mRNA
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ID- 2753

32. In Sickle Cell Anaemia, the change in the shape of RBC from biconcave disc to sickle cell like structure is due to:

  • (A) Mutant Hb molecule undergo polymerization under low O2 tension.
  • (B) Single base substitutions of the 6th codon of β-globin gene from GAG to GUG
  • (C) Substitution of Glutamic Acid by valine at 6th position of β-globin chain of Hb
  • (D) All of these
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ID- 2754
BSEB, 2018 (C)

33. The coding sequence of monocistronic structural gene is called:

  • (A) Intron
  • (B) Exon
  • (C) Cistron
  • (D) Recon
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ID- 2755
BSEB, 2018 (C)

34. Which of the following is a average no. of adenylate residues at 3' end in a template stands during tailing of transcriptional process of Eukaryotic RNA?

  • (A) 600 – 800
  • (B) 100 – 200
  • (C) 200 – 300
  • (D) 50 – 100
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ID- 2762

35. DNA fragments are joined in a correct sequence by:

  • (A) DNA ligase
  • (B) RNA polymerase
  • (C) Helicase
  • (D) DNA polymerase
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ID- 2763
BSEB, 2018 (C)

36. The Govt organzation which make the decision regarding validity of GM research and the safety of introducting GM organism for public service is:

  • (A) Genetically Engineered Approval Committee
  • (B) Genetically Engineered Management Committee
  • (C) Genetically Engineered Monitoring Authority
  • (D) None of these
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ID- 2764
BSEB, 2018 (C)

37. Satellite DNA is useful tool in:

  • (A) Sex determination
  • (B) Forensic science
  • (C) Genetic engineering
  • (D) Organ Transplantation
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ID- 2765
BSEB, 2018 (C)

38. The size of the variable number of tendem repeats (VNTR) varies from:

  • (A) 0.1 to 20 (kb)
  • (B) 20 to 150 (kb)
  • (C) 100 to 1000 (kb)
  • (D) 0.001 to 0.1 (kb)
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ID- 2766
BSEB, 2019 (A)

39. Amplification of gene for interest may be done by:

  • (A) MMR
  • (B) PCR
  • (C) MRI
  • (D) All of these
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ID- 2767
BSEB, 2019 (A)

40. RNAi is used to control pests on which plant?

  • (A) Tobacco
  • (B) Mango
  • (C) Potato
  • (D) Poppy
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ID- 2768
BSEB, 2019 (A)

41. For induction of alien DNA in host cell we may use:

  • (A) Gene gun
  • (B) Micro-pipette
  • (C) Both (A) & (B)
  • (D) None of these
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ID- 2769

42. One turn of the helix in β-from DNA is approximately.

  • (A) 20 Å
  • (B) 2 nm
  • (C) 20 nm
  • (D) 3.4 nm
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ID- 2770
BSEB, 2020 (A)

43. Okazaki fragment is:

  • (A) RNA (RNA primers)
  • (B) Small segments of DNA on leading stand
  • (C) Small segments of DNA on lagging stand
  • (D) None of these
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ID- 2771

44. One of these is not prepared directly from DNA:

  • (A) m-RNA
  • (B) t-RNA
  • (C) r-RNA
  • (D) Protein
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45. Coiling of DNA duplex is:

  • (A) Left handed
  • (B) Right handed
  • (C) Parallel
  • (D) All of these
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46. DNA double helix model was given by:

  • (A) Knoll and Ruska
  • (B) Khorana
  • (C) Watson and Crick
  • (D) Priestley
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ID- 2774
BSEB, 2019 (A)

47. Synthesis of RNA on DNA template is known as:

  • (A) Translation
  • (B) Transcription
  • (C) Transduction
  • (D) Replication
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ID- 2775
BSEB, 2019 (A)

48. Uracil is related to:

  • (A) RNA
  • (B) DNA
  • (C) Both (A) and (B)
  • (D) None of these
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49. RNA is genetic material in:

  • (A) prokaryotes
  • (B) eukaryotes
  • (C) Tobacco Mosaic Virus (TMV)
  • (D) E. coil
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50. The year 2003 was celebrated on the 15th anniversary of discovered by:

  • (A) Transposons by Barbara MC clintock
  • (B) Structure of DNA by Waston and Crick
  • (C) Mendel's laws of inheritance
  • (D) biotechnology by Kary Mullis
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ID- 2835

51. Which of the following phenomena was experimentally proved by Meselson and Stahl?

  • (A) Transformation
  • (B) Transduction
  • (C) Semi-conservative DNA replication
  • (D) Central dogma
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ID- 2836
BSEB, 2011, 2021 (A)

52. Nucleoside is:

  • (A) Sugar + a nitrogenous base
  • (B) Sugar + Phosphate
  • (C) Nitrogenous base + Phosphate
  • (D) None of these
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ID- 2837
BSEB, 2021 (A)

53. Purine bases of DNA are:

  • (A) Adenine and Cytosine
  • (B) Cytosine and Thymine
  • (C) Adenine and Guanine
  • (D) None of these
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ID- 2838

54. Methyl guanosine triphosphate is added to the 5' end of hrRNA in a progress of:

  • (A) splicing
  • (B) capping
  • (C) tailing
  • (D) none of these
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ID- 2839

55. Polycistronic messenger RNA (mRNA) usually occurs in:

  • (A) bacteria
  • (B) prokaryotes
  • (C) eukaryotes
  • (D) both 'A' and 'B'
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ID- 2840

56. Transcription unit:

  • (A) starts with TATA box
  • (B) starts with pallendrous regions and ends with rho factor
  • (C) starts with promotor region and end in terminator region
  • (D) starts with CAAT region
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57. The three codons with result in the termination of polypeptide chain in synthesis are:

  • (A) UAA, UAG, GUA
  • (B) UAA, UAG, UGA
  • (C) UAA, UGA, UUA
  • (D) UGU, UAG, UGA
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58. Some amino acid are coded by more than one codan, hence the genetic code is:

  • (A) overlapping
  • (B) degenerate
  • (C) wobbled
  • (D) unambiguous
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59. Amino acids which are specified by single codons are:

  • (A) phenylalanine and arginine
  • (B) tryptophan and methionine
  • (C) valine and proline
  • (D) methionine and arginine
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60. UTRs are the untranslated regions present on:

  • (A) rRNA
  • (B) tRNA
  • (C) mRNA
  • (D) hnRNA
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ID- 2845

61. During expression of an operon, RNA Polymerase binds to:

  • (A) structural gene
  • (B) regulator gene
  • (C) operator
  • (D) promoter
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62. Regulations of gene expression occurs at the level of:

  • (A) transcription
  • (B) processing/splicing
  • (C) translation
  • (D) all of these
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ID- 2847

63. Human genome consists of approximately:

  • (A) 3 x 109
  • (B) 6 x 109 bp
  • (C) 20,000 – 25,000 bp
  • (D) 2.2 x 104 bp
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ID- 2848

64. Estimated number of gene in human beings is:

  • (A) 3,000
  • (B) 80,000
  • (C) 20,500
  • (D) 3 x 109
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ID- 2849

65. In a DNA strand the nucleotides are linked together by:

  • (A) glycosidic bonds
  • (B) phosphodiester bonds
  • (C) poptide bonds
  • (D) hydrogen bonds
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ID- 2850

66. A nucleoside differs from a nucleotide. It lacks the:

  • (A) base
  • (B) sugar
  • (C) phosphate group
  • (D) hydroxyl group
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67. Both deoxyribose and ribose belong to class of sugars called:

  • (A) trioses
  • (B) hexoses
  • (C) pentoses
  • (D) polysacccharides
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68. The first genetic materials could be:

  • (A) protein
  • (B) carbohydrates
  • (C) DNA
  • (D) RNA
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69. The human chromosome which the highest and least number of gene in them are respectively:

  • (A) Chromosome 21 and Y
  • (B) Chromosome 1 and X
  • (C) Chromosome 1 and Y
  • (D) Chromosome X and Y
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70. Who amongst the following scientists had no contribution in the development of the double helix model of the structure of DNA?

  • (A) Rosalind Franklin
  • (B) Maurice Wilkins
  • (C) Erwin Charagaff
  • (D) Meselson and Stahl
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71. Which of the following steps in transcription is catalysed by RNA polymerase?

  • (A) Initiation
  • (B) Elongation
  • (C) Termination
  • (D) All of the above
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72. Control of gene expression takes place at the travel of:

  • (A) transcription
  • (B) translation
  • (C) Both 'A' and 'B'
  • (D) none of the above
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73. In some viruses, DNA is synthesised by using RNA as template. Such a DNA is called:

  • (A) A-DNA
  • (B) B-DNA
  • (C) c DNA
  • (D) r DNA
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ID- 2858

74. The RNA Polymerase holoenzyme transcribes:

  • (A) the promoter, structural gene and the terminator region
  • (B) The promoter and terminator region
  • (C) The structural gene and the terminator region
  • (D) The structural gene only
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75. In E. coil, the lac operon gets switched on when:

  • (A) lactose is present and it binds to the repressor
  • (B) repressor binds to operator
  • (C) RNA polymerase binds to the operator
  • (D) lactose is present and it binds to RNA polymerase
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ID- 2860
BSEB, 2016

76. Trisomy (2n 1) causes retardation in child, which is known as:

  • (A) Philadelphia
  • (B) Down's Syndrome
  • (C) Albinism
  • (D) None of these
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ID- 2861
BSEB, 2016

77. DNA fingerprinting is:

  • (A) DNA typing
  • (B) DNA profiling
  • (C) Both 'A' and 'B'
  • (D) base paring
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ID- 2862
BSEB, 2016 (C), 2017 (A), 2017 (C), 2021 (A)

78. DNA is genetic material of:

  • (A) T.M.V.
  • (B) Bacteriophage
  • (C) 'A' and 'B' both
  • (D) None of these
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79. Which of the nitrogenous base is not present in RNA:

  • (A) Thymine
  • (B) Cytosine
  • (C) Guarnine
  • (D) Adenine
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ID- 2864
BSEB, 2017 (A), 2021 (A)

80. Operon Model is representation of:

  • (A) Gene synthesis
  • (B) Gene expression
  • (C) Gene regulation
  • (D) Gene function
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ID- 2865
BSEB, 2017 (A), 2017 (C)

81. Which nitrogenous base is present in DNA?

  • (A) Thymine
  • (B) Uracil
  • (C) Guanine
  • (D) Cytosine
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ID- 2866
BSEB, 2017 (A), 2017 (C)

82. Formation of m RNA from DNA is called:

  • (A) Transcription
  • (B) Replication
  • (C) Translation
  • (D) None
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ID- 2867
BSEB, 2018 (A)

83. Which of the following is involved in transcription of t RNA, 5Sr RNA and Sn RNA of eukaryotes?

  • (A) RNA Polymerase I
  • (B) RNA Polymerase II
  • (C) RNA Polymerase III
  • (D) All of these
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