Biology MCQs page 6

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51. Recombinant DNA is introduced in to host cell by means of
(A) phage
(B) vector
(C) bacteria
(D) enzyme

52. In cystic fibrosis, the patient lacks a gene that codes for trans-membarene carrier of
(A) sodium ion
(B) carbon dioxide
(C) chloride ion
(D) potassium ion

53. Which gene is located on linkage group number 11 in man
(A) sickle cell anemia
(B) leukemia
(C) albinism
(D) all of these

54. In birds the sex is determined by the type of
(A) sperm
(B) autosomes
(C) egg
(D) none of these

55. In RNA nucleotides are attached by
(A) peptide bonds
(B) hydrogen bonds
(C) covalent bond
(D) phosphodiester bond

56. The chromosome is
(A) gene
(B) genes + protein
(C) DNA + genes
(D) gene + protein

57. The human body contains water
(A) 60-80%
(B) 70-90%
(C) 75-95%
(D) 80-90%

58. Environment is a source of
(A) food
(B) shelter
(C) clothing
(D) all of these

59. Fresh water ecosystem covers
(A) 2%
(B) 1%
(C) 3%
(D) 5%

60. Foul smell in lake is produced by
(A) algae
(B) bacteria
(C) fungi
(D) all of these
ANSWERS: BIOLOGY MCQS
51. B
52. C
53. D
54. C
55. D
56. B
57. B
58. D
59. B
60. D

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