The name of the pacemaker of the heart is

1.The sugar present in milk is _______.

(A) Sucrose
(B) Fructose
(C) Lactose
(D) Glucose
Answer: (C)

2.The space between the plasma membrane and the cell wall of a plasmolyzed cell surrounded by a hypertonic solution is occupied by the

(A) hypotonic solution
(B) isotonic solution
(C) hypertonic solution
(D) water
Answer:  (C)

3.The single horned Rhinoceros is protected at _______.

(A) Kaziranga National Park
(B) Kahna National Park
(C) Rajiv Gandhi National Park
(D) Anashi National Park
Answer: (A)

4.The number of ATP produced when a molecule of glucose undergoes fermentation is

(A) 4
(B) 36
(C) 2
(D) 38
Answer:  (C)

5.The offspring produced from a marriage have only O or A blood groups. Of the genotypes given below, the possible genotypes of the parents would be

(A) IOIO and IOIO
(B) IAIA and IOIO
(C) IAIO and IOIO
(D) IAIA and IAIO
Answer: (C)

6.The part of the brain where the centre for hunger and thirst is located is

(A) Cerebrum
(B) Hypothalamus
(C) Cerebellum
(D) Medulla Oblongata
Answer: (B)

7.The species, though insignificant in number, determine the existence of many other species in a given ecosystem. Such species is known as

(A) Keystone species
(B) Sacred species
(C) Endemic species
(D) Extinct species
Answer: (A)

8.The scientific name of the moth which produce tasar is

(A) Bombyx mori
(B) Antheraea mylitta
(C) Antheraea assamensis
(D) Philosomia ricini
Answer: (B)

9.The rosette habit of cabbage can be changed by application of

(A) IAA
(B) GA
(C) ABA
(D) Ethaphon
Answer:  (B)

10.The respiratory quotient during cellular respiration would depend on

(A) the nature of the substrate
(B) the amount of carbon dioxide released
(C) the amount of oxygen utilised
(D) the nature of enzymes involved
Answer: (A)

11.The reflex arc, which is made of two neurones is known as

(A) Monosynaptic reflex arc
(B) Disynaptic reflex arc
(C) Polysynaptic refles arc
(D) Asynaptic reflex arc
Answer: (A)

12.The presence of corollary corona, sagittate anthers and dumb-bell shaped stigma are the
characteristic features of _______.

(A) Hibiscus rosa-sinensis
(B) Musa paradisiaca
(C) Ravenala madagascariensis
(D) Catheranthus roseus
Answer: (D)

13.The name of the pacemaker of the heart is

(A) Lymph node
(B) S.A. node
(C) Juxtaglumerular apparatus
(D) Semilunar valve
Answer: (B)

14.The name of Smt. Thimmakka is associated with the

(A) planting and conservation of avenue trees
(B) agitations against hydroelectric project
(C) ‘Appiko’ movement
(D) conservationof fauna and flora of the western ghats
Answer:  (A)

15.The main difference between Gram positive and Gram negative bacteria is

(A) Cell membrane
(B) Cell wall
(C) Ribosome
(D) Mitochondria
Answer: (B)