21.
Two cells $$A$$ and $$B$$ are contiguous. Cell $$A$$ has osmotic pressure 10 atm, turgor pressure 7 atm and diffusion pressure deficit 3 atm. Cell B has osmotic pressure 8 atm, turgor pressure 3 atm and diffusion pressure deficit 5 atm. The result will A
no movement of water
B
equilibrium between the two
C
movement of water from cell $$A$$ to $$B$$
D
movement of water from cell $$B$$ to $$A$$
Answer :
movement of water from cell $$A$$ to $$B$$
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22.
The mineral nutrient mainly concerning with apical meristematic activity is A
K
B
Ca
C
N
D
S
Answer :
Ca
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23.
The rupture and fractionation do not usually occur in the water column in vessel/ tracheids during the ascent of sap because of A
lignified thick walls
B
cohesion and adhesion
C
weak gravitational pull
D
transpiration pull
Answer :
cohesion and adhesion
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24.
The conversion of starch to organic acid is essential for stomatal A
Closure
B
Growth
C
Initiation
D
Opening
Answer :
Opening
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25.
Who proposed the protein lecithin theory A
Sachs
B
Lundegardh
C
Bose & Rennr
D
Bennet & Clark
Answer :
Bennet & Clark
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26.
What is action spectrum of transpiration A
Green and U.V
B
Blue and Yellow
C
Blue and far red
D
Blue and red
Answer :
Blue and red
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27.
Fruit ripening can be hastened by treatment with A
IAA
B
Florigen
C
Ethylene
D
Cytokinin
Answer :
Ethylene
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28.
Root hairs occurs in A
Meristematic zone
B
Cell elongation zone
C
Cell maturation zone
D
Old root
Answer :
Cell maturation zone
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29.
Little leaf disease is caused by A
Zn-deficiency
B
Cu-deficiency
C
Mo-deficiency
D
Mn-deficiency
Answer :
Zn-deficiency
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30.
Cell sap is found in which cell organelle A
Nucleous
B
Chloroplast
C
Vacuole
D
Golgi Apparatus
Answer :
Vacuole
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