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61. Which of the following combination is an example of self replicating organelles?

A. Mitochondria Ribosomes
B. Mitochondria Nucleus
C. Mitochondria Chloroplast
D. Mitochondria Vacuole

62. Which of the following is an autosomal disorder______________?

A. Down’s syndrome
B. Klinifelter’s syndrome
C. Turner’s syndrome
D. Jacob’s syndrome

63. Embryonic induction is caused by part developing from_____________?

A. Endoderm
B. Ectoderm
C. Mesoderm
D. Extraembryonic layers

64. Sickle cell anemia is an example of_________________?

A. Chromosomal aberration
B. Insertion of gene
C. Deletion of gene
D. Point mutation

65. The type of plastids which help in pollination is_________?

A. Chromoplasts
B. Leucoplasts
C. Chloroplasts
D. All of these

66. Purines and pyrimidines are in equal ration in DNA. It was indicated by_______________?

A. F.Miescher
B. Chargaff
C. Watson & Crick
D. Harshay & Chase

67. Chlorophyll is a/an _____ molecule?

A. Inorganic
B. Cationic
C. Anionic
D. Organic

68. Ribonucleo-protein particles are the name of__________?

A. DNA
B. Nucleus
C. Eukaryotic ribosomes
D. RNA

69. Lock and Key model was proposed by______________?

A. Emil Fischer
B. Koshland
C. Robin Williams
D. Rudolph Virchow

70. Which step causes activation of catalytic site of an enzyme__________________?

A. Change in pH of the surroundings.
B. Formation of Enzyme Susstrate complex.
C. Change in the charge of the active site.
D. Change in temperature