61. Bt cotton variety that was developed by the introduction of toxin gene of Bacillus thuringiensis (Bt) is resistant to
(1) Fungal diseases
(2) Plant nematodes
(3) Insect predators
(4) Insect pests
62. Meiotic division of the secondary oocyte is completed
(1) At the time of copulation
(2) After zygote formation
(3) At the time of fusion of a sperm with an ovum
(4)
Prior to ovulation
63. Which of the following statements are true for the phylum-Chordata?
(a) In Urochordata notochord extends from head to tail and it is present throughout
their life.
(b) In Vertebrata notochord is present during the embryonic period only.
(c) Central nervous system is dorsal and hollow.
(d) Chordata is divided into 3 subphyla : Hemichordata, Tunicata and Cephalochordata
(1) (c) and (a)
(2) (a) and (b)
(3) (b) and (c)
(4) (d) and (c)
64.Match the following columns and select the correct option.
Column-I Column-II
(a) Clostridium butylicum (i) Cyclosporin-A
(b) Trichoderma polysporum (ii) Butyric Acid
(c) Monascus purpureus (iii)Citric Acid
(d) Aspergillus niger (iv) Blood cholesterol
(a) (b) (c) (d)
(1) (ii) (i) (iv) (iii)
(2) (i) (ii) (iv) (iii)
(3) (iv) (iii) (ii) (i)
(4) (iii) (iv) (ii) (i)
65. Which of the following pairs is of unicellular algae?
(1) Gelidium and Gracilaria
(2) Anabaena and Volvox
(3)
Chlorella and Spirulina
(4) Laminaria and Sargassum
66. Presence of which of the following conditions in urine are indicative of Diabetes Mellitus?
(1) Uremia and Renal Calculi
(2)
Ketonuria and Glycosuria
(3) Renal calculi and Hyperglycaemia
(4) Uremia and Ketonuria
67. Secondary metabolites such as nicotine, strychnine and caffeine are produced by plants for their
(1) Growth response
(2) Defence action
(3) Effect on reproduction
(4) Nutritive value
68. Which of the following would help in prevention of diuresis?
(1) Reabsorption of Na+ and water from renal tubules due to aldosterone
(2) Atrial natriuretic factor causes vasoconstriction
(3) Decrease in secretion of renin by JG cells
(4) More water reabsorption due to undersecretion of ADH
69. Select the correct match
(1) Phenylketonuria – Autosomal dominant trait
(2) Sickle cell anaemia – Autosomal recessive trait, chromosome-11
(3) Thalassemia – X linked
(4) Haemophilia – Y linked
70. Which of the following is not an attribute of a population?
(1) Natality
(2) Mortality
(3) Species interaction
(4) Sex ratio
Answers:
61. (4) Insect pests
62. (4) Prior to ovulation
63. (3) (b) and (c)
64. (1) (ii) (i) (iv) (iii)
65. (3) Chlorella and Spirulina
66. (2) Ketonuria and Glycosuria
67. 2) Defence action
68. (1) Reabsorption of Na+ and water from renal tubules due to aldosterone
69. (2) Sickle cell anaemia – Autosomal recessive trait, chromosome-11
70. (3) Species interaction