Ash

1. Transpiration and it’s significance
(Multiple choice questions)
Team members
Devadharshini.p
Dhivya.v
Dhivya.h
Divya.j.k

2. 1. The surface of the leaf bears the large number of pores are
Called
A) hydathodes B) lenticels C) stomata D) cuticle
2. Which layer is inelastic in guard cells and which layer Is
elastic in nature
A) Inner& outer Layer B) outer&inner layer C) all of the above
3. True or false
Statement: the stomata containsthe a chlorophyll But their function is
uncertain true
4. Stomata was discoveredby Whom
A) Dalton B) porter (et al) C) JulienJoseph vesque D) none

3. 5. The rate of transpiration will be more When the
A) atmosphere is dry. B) Temperature high C) humidity high.
D) bothAandB
6. One of the internal factor which affects the rate of transpiration is
A) big size of the leaf. B) sunken stomata c) size of the stomata
D) all of the above
7. Name the wax like layer which reduces the transpiration
A)upper epidermis B) lower epidermis. C) cuticle D) none of the
Above

4. 8. Most of the transpiration occurs in tall trees through
A) Stomata. B) cuticle C) lenticel. D) bark
9. the transpiration Occurs in tall trees in which part
A)Leaf B) root C) stem D)all the above
10.Odd one out:
A) Gravimetric method. B) lysimeter method. C) porometer
D) peel method
11.The substance which can reduce transpiration without much
much effect on CO2 fixation
A) transpiration. B) evaporation. C) anti-transpirant. D) respiration

5. 12. How many types of anti-transpirant are there
A) 5. B) 4. C) 3. D) 2.
13. Hexadeconol - is an example for which type of anti-transpirant
A) metabolic poison. B) Film Forming type. C) stomatalclosing
14. The process of photophosphorylation in guard cells are inhibited
by which substance
A) CCP
. B) kaoline. C) Farnesol. D) Phenylmercuric acid
15. The substance that decrease the transpiration Without decreasing
Photosynthesis
. A) Kaoline. B) salicyladoxime. C) Farnesol. D) PMA

6. 16.Potometer and clinostatare used to study
a) photosynthesisand respiration
b)transpiration andgrowth
c)phototropism and geotropism
d) transpiration and geotropism
17.The rate of transpiration will be high when there is?
a)Rainyseason.
c) Summer season.
b)winter season
d)none of these
18.Which type of transpiration ismore common-
a)Cuticular.
c) Lenticular.
b)stomatal
d)bark transpiration
19.Maximum transpiration is taking place through
a) Stomata. b) lenticel. C) Hydathode. D) cuticle

7. 20.The inter conversion of sugar& starch is dependent on pH changes in the guard cells was
demonstrated by
a)Levitt.
c)Sayre.
b) Lloyd
d)steward
21.The spray of PMA causes :-
a) Decrease in transpiration
b) Increase in transpiration
c) Increase in absorption
d) Increase in guttation
22.Which chemical is used to detect transpiration comparatively?
a) Calcium carbonate.
C) Cobalt chloride.
b) cobalt carbonate
d)mercuric acetate
23.Active K+ ion exchange mechanism of opening and closing of stomata was given by:-
a)Khorana. B)scrath
D)kohli

8. 24.Cuticular transpiration is observed mainly in:-
a)Xerophtes.
c)Trees.
b) herbaceous plants
d)shrubs
25.Whatis action spectrum of transpiration?
a)Green and uv
c) Blue and far red.
b)blue and yellow
D) blue and red
26.In which of the following plants, the metabolism will be hindered if upper surface of leaves are
coated with wax?
a)Hydrilla.
c)Vallisneria.
b)nelumbium
d)Utricularia
27.Which of the following substance serve as an anti-transpirant in Plant?
a)Phenyl mercuric acetate.
c) Silicon oil.
b)asprin
d)all of these

9. 28.Which of the factors act as anti-transpirant
a)SO2.
c) CO2.
b)CO
d)All pollutant gases
29.Transpiration is a non-enzymatic process it’s Q10 value is :-
a)1.
c)3.5.
b)2
d) zero
30.The most important factor affecting transpiration is
a)Light.
c)Wind.
b) temperature
d) atmospheric humidity