Physiology TNPSC Group 1 Questions

Physiology MCQ Questions

7.
The tropic movement that helps the climbing vines to find a suitable support is
A.
phototropism
B.
geotropism
C.
thigmotropism
D.
chemotropism
ANSWER :
C. thigmotropism
8.
The chemical reaction occurs during photosynthesis is
A.
CO2 is reduced and water is oxidized
B.
water is reduced and CO2is oxidized
C.
both CO2 and water are oxidized
D.
both CO2 and water are produced
ANSWER :
A. CO2 is reduced and water is oxidized
9.
A growing seedling is kept in the dark room. A burning candle is placed near it for a few days. The tip part of the seedling bends towards the burning candle. This is an example of
A.
Chemotropism
B.
Geotropism
C.
Phototropism
D.
Thigmotropism
ANSWER :
C. Phototropism
10.

Choose the correct answer :

The plant root system is

1. negatively phototropic but positively geotropic

2. positively phototropic but negatively geotropic

A.

1 alone correct

B.

2 alone correct

C.

1 and 2 is correct

D.

Both are wrong

ANSWER :

A. 1 alone correct

11.
Chlorophyll in a leaf is required for
A.
photosynthesis
B.
transpiration
C.
nastic movement
D.
tropic movement
ANSWER :
A. photosynthesis
12.

Usually shoot system of a plant is

1. positively phototropic and negatively geotropic

2. negatively phototropic and positively geotropic

A.

1 alone correct

B.

2 alone correct

C.

1 and 2 is correct

D.

Both are wrong

ANSWER :

A. 1 alone correct