CSIR life science model question paper plant physiology
Cold physiology
- Ice formation in intercellular spaces in plants occurs at:
- (a) 4 to 0 °C
- (b) 0 to -3 °C
- (c) -3 to -6 °C
- (d) -6 to -9 °C
- Following are the statments about cold stress in plants
- (a) Heat shock proteins are involved in the freezing tolerance.
- (b) Some bacteria increase frost damage to the plants.
- (c) More is the unsaturated fatty acid in the membrane, less will be the chilling tolerance of palnts.
- (d) Gradual cooling to freezing temperature in plant is less harmful than quick freezing.
- (a)a, b, c
- (b)b, c, d
- (c)a, b, d
- (d)a, c, d
- Following are the statments about heat stress in plants
- (a) C3 plant are more sensitive to heat stress than C4 plants.
- (b) Heat Shock proteins prevent protein misfolding during heat stress.
- (c) Acclimation againts heat stress accumulates more saturated fatty acids in the membrane.
- (d) Presence of reflective hairs increase the heat stress in plants.
- (a)a, b, c
- (b)b, c, d
- (c)a, b, d
- (d)a, c, d
- Sodicity in the soil is caused by:
- (a) Na+
- (b) Mg2+
- (c) Ca2+
- (d) SO2-
Which statement is true:
Which statement is true:
First published on 10-02-2022
Last updated on 10-02-2022
Last updated on 10-02-2022
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