1. A transport which uses energy to pump molecules against a concentration gradient is known as
a) Diffusion
b) Facilitated diffusion
c) Active transport
d) All of these
Explanation: A transport which uses energy to pump molecules against a concentration gradient is known as Active transport
2. Proteins in the membrane, responsible for facilitated diffusion and active transport, show some
common characteristic like.
(1) Being highly selective
(2) Being liable to saturate
(3) Responding to inhibitor
(4) Being regulated by hormones
a) 1 and 2 only
b) 2 and 3 only
c) 3 and 4 only
d) All of these
Explanation: All of these
3. Identify the parts A to E given in the figure. 
a) A–Antiport B, B–Uniport A, C–Antiport A, D–Symport B, E–Carrier point
b) A–Carrier point, B–Antiport A, C–Uniport A, D–Symport B, E–Antiport B
c) A–Carrier point, B–Antiport B, C–Symport B, D–Uniport A, E–Antiport A
d) A–Symport B, B–Antiport A, C–Antiport B, D–Carrier point, E–Uniport A
Explanation: A–Carrier point, B–Antiport B, C–Symport B, D–Uniport A, E–Antiport A
4. Select the incorrect statement from the following:
(1) A watermelon has over 92 per cent water.
(2) Most herbaceous plants have only about 10–15% of its fresh water as dry matter.
(3) Woody parts of the plant have very little water.
(4) Seed is without water.
(5) Mature corn plant absorbs almost three litres of water per day.
(6) Mustered plant absorbs water epical to its own weight in about 5 hours.
a) All except 6
b) All except 5
c) Only 4
d) Only 3
Explanation: Only 4
5. Water is often a limitary factor for plant growth and _________ in both _________ and
_________ environments.
a) productivity, agricultural, natural
b) movement, agricultural, artificial
c) photosynthesis, aquatic, terrestrial
d) senescence, agricultural, natural
Explanation: Water is often a limitary factor for plant growth and productivity in both agricultural and natural environments.
6. The major similarity between active transport and facilitated diffusion is that
a) Both consume ATP
b) Both are passive
c) Both are non-selective
d) Both require membrane proteins
Explanation: Both require membrane proteins
7. A watermelon has approximately _________ of water.
a) 20%
b) 80%
c) 100%
d) 92%
Explanation: A watermelon has approximately 92% of water.
8.Which of the following has minimum amount of water?
a) Leaf
b) Flower
c) Epidermal cell of root
d) Cork
Explanation: Cork
9. Select from the following which one is moved by active transport
(1) Na+ amino acid, in proximal convoluted tubules.
(2) Absorption of most minerals by epidermal cells of root.
(3) Na+ K+ pump.
(4) Loading of sucrose from companion cell to sieve tube cells.
a) All except 4
b) All except 3
c) All except 1
d) All of these
Explanation: All of these
10. The two main components which determine water potential are
a) Solute potential
b) Pressure potential
c) Matric potential
d) Both (a) and (b)
Explanation: Both (a) and (b)