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9
MCQ (Single Correct Answer)

Choose the correct option mycorrhiza is a symbiotic association of fungus with root system which helps in

A. absorption of water

B. mineral nutrition

C. translocation

D. gaseous exchange

A
Only A
B
Only B
C
Bothg A and B
D
Both B and C
10
MCQ (Single Correct Answer)

Based on the figure given below which of the following statements is not correct?

A
Movement of solvent molecules will take place from chamber A to B
B
Movement of solute will take place from A to B
C
Presence of a semipermeable is a pre-requisite for this process to occur
D
The direction and rate of osmosis depends on both the pressure gradient and concentration gradient
11
MCQ (Single Correct Answer)

Match the followings and choose the correct option.

Column I Column II
A. Leaves (i) Anti-transpirant
B. Seed (ii) Transpiration
C. Roots (iii) Negative osmotic potential
D. Aspirin (iv) Imbibition
E. Plasmolysed cell (v) Absorption

A
A-ii, B-iv, C-v, D-i,E-iii
B
A-iii, B-ii, C-iv, D-i, E-v
C
A-i, B-ii, C-iii, D-iv, E-v
D
A-v, B-iv, C-iii, D-ii, E-i
12

Mark the mismatched pair.

Column I Column II
A. Amyloplast (i) Store protein granule
B. Elaioplast (ii) Store oils or fats
C. Chloroplasts (iii) Contain chlorophyll pigments
D. Chromoplasts (iv) Contain coloured pigments other than chlorophyll

Explanation
Amyloplasts are the colourless plastids which store starch but not the protein granules. Other pairs are correctly matched.
13
Smaller, lipid soluble molecules diffuse faster through cell membrane, but the movement of hydrophilic substances are facilitated by certain transporters which are chemically ........... .
Explanation

Proteins.

The movement of hydrophilic substances are facilitated by transporters which are chemically proteins. These proteins form porins, which are huge pores in the outer membranes of the plastids, mitochondria and some bacteria. These porins allow the small molecules to pass through the membrane.