Tamil Nadu (English Medium) Plus 2 Biology Science Study Materials, Online Learning, Question Papers, Classnotes, Practice Test, MCQ | Smartindia Educational Program : www.smartindia.net.in

Question-1
Seedless water-melons are obtained by

(A) haploidy	(B) triploidy
(C) gibberellin application	(D) vegetative propagation

Question-2
During drought condition, the plants produce a hormone known as

(A) ethylene	(B) abscisic acid
(C) indole acetic acid	(D) indole butyric acid

Question-3
The length of a plant can be increased by

(A) periblem	(B) dermatogen
(C) apical meristem	(D) lateral meristem

Question-4
Which of the following pigment is sensitive to red and far red (infra-red) light?

(A) cytochrome	(B) phytochrome
(C) phyllotaxis	(D) none of these

Question-5
Growth movements, in response to light, are called

(A) photolysis	(B) phototropism
(C) photoperiodism	(D) photosynthesis

Question-6
Excessive elongation of plant stem is due to

(A) IAA	(B) auxin
(C) cytokinin	(D) gibberellin

Question-7
A pigment, which absorbs red and far-red light is

(A) Carotene	(B) phytochrome
(C) cytochrome	(D) xanthophyII

Question-8
Which hormone is used to induce ripening in banana?

(A) GA	(B) ABA
(C) ethylene	(D) cytokinin

Question-9
Which of the following pigments is found in two forms?

(A) phytophore	(B) phytochrome
(C) cytochrome	(D) chlorophyII

Question-10
The usual shape of growth curve in plants is

(A) linear	(B) sigmoid
(C) zig-zag	(D) tetrahedral

Click here to see your answersheet and detailed track records.

Plus 2 Biology Science

Tamil Nadu (English Medium)

Practice in Related Chapters
Taxonomy of Angiosperms
Anatomy of Plants
Biology in Human Welfare
Cell Biology and Genetics
Plant Physiology
Biotechnology