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1 of 25
Q.1 Dry seeds kept in water swell due to
- absorption
- diffusion
- imbibition
- none of these
2 of 25
Q.2 Choose the correct statement/statements. Pumps in active transport are A. Lipids that bind molecules to pass them through the membrane. B. Transport molecules uphill. C. These are specific transporters. D. These are sensitive to inhibitors
- A and C
- A, B and D
- B, C and D
- C and D
3 of 25
Q.3 Which of the following is the unit of ψ?
- Pascal
- Joule
- Newton
- Electron volt
4 of 25
Q.4 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 be
- No movement of water
- Movement of water from cell B to A
- Movement of water from cell A to B
- Equilibrium between the two
5 of 25
Q.5 Which of the following is decreased during increase in humidity in the atmosphere?
- Transpiration
- Photosynthesis
- Respiration
- Glycolysis
6 of 25
Q.6 Ψs is always
- positive
- zero
- negative
- one
7 of 25
Q.7 Two types of molecules cross the membrane in the same direction, it is called as
- Uniport
- Symport
- Antiport
- Multiport
8 of 25
Q.8 Diffusion rate is affected by
- temperature
- membrane permeability
- gradient of concentration
- all of these
9 of 25
Q.9 Cells shrink in _________ solution
- isotonic
- hypotonic
- hypertonic
- hypotonic and hypertonic
10 of 25
Q.10 Which of the following is true about diffusion?
- There is no expenditure of energy
- Molecules move in Brownian motion
- Substances moves from the region of higher concentration to the region of lower concentration.
- Diffusion depends on the type of living system
11 of 25
Q.11 Which of the following is true about diffusion?
- There is no expenditure of energy
- Molecules move in Brownian motion
- Substances moves from the region of higher concentration to the region of lower concentration
- Diffusion depends on the type of living system
12 of 25
Q.12 Water is lost in a liquid state in some plants through hydathodes. These hydathodes
- do not show any specificity in opening and closing
- remain closed during day
- remain closed at night
- remain always open
13 of 25
Q.13 If pressure greater than atmospheric pressure is applied to pure water, the water potential
- increases
- decreases
- remains same
- atmospheric pressure does not affect water potential
14 of 25
Q.14 Choose the correct sequence of water movement in the plants.
- Cortex, protoxylem, endodermis, root hair, pericycle, metaxylem
- Root hair, cortex, endodermis, pericycle, protoxylem, metaxylem
- Root hair, protoxylem, metaxylem, pericycle, cortex, endodermis
- Root hair, pericycle, endodermis, cortex, protoxylem, metaxylem
15 of 25
Q.15 Wilting of a plant results from excessive
- respiration
- photosynthesis
- absorption
- transpiration
16 of 25
Q.16 Cohesion theory of water movement in plants was put forth by
- Henry Dixon
- F. F. Blackman
- Melvin cycle
- Hans. A. Krebs
17 of 25
Q.17 Diffusion rate is affected by
- temperature
- membrane permeability
- gradient of concentration
- all of these
18 of 25
Q.18 When a plant is girdled (ringed)
- the root and shoot die at the same time
- the shoot dies first
- the root dies first
- neither root nor shoot will die
19 of 25
Q.19 Choose the correct statement/statements. Pumps in active transport are A. Lipids that bind molecules to pass them through the membrane. B. Transport molecules uphill. C. These are specific transporters. D. These are sensitive to inhibitors
- A and C
- A, B and D
- B, C and D
- C and D
20 of 25
Q.20 Assertion (A): K+ ion accumulation found in Nitella depends on its respiratory activity. Reason (R)Absorption of all ions in plants completely depends on the usage of metabolic energy. The correct answer is
- A and R are true and R is the correct explanation of A
- A and R are true but R is not the correct explanation of A
- A is true but R is false
- A is false but R is true
21 of 25
Q.21 Root hairs absorb water from soil with the help of
- Root pressure
- osmotic pressure
- Suction pressure
- Turger pressure
22 of 25
Q.22 Proteins that form huge pores in the membrane of the certain organelles and bacteria are called as
- Porins
- Pressure gradient
- Enzymes
- Flaccid
23 of 25
Q.23 What is the effect of turgor pressure in Munch hypothesis?
- Increase of turgor pressure
- Decrease of turgor pressure
- No change in turgor pressure
- independent to water potential gradient
24 of 25
Q.24 Munch hypothesis is based on
- Translocation of food due to turgor pressure gradient and imbibition force
- Translocation of food due to turgor pressure gradient
- Translocation of food due to imbibition force
- None of the above
25 of 25
Q.25 ψp denotes to
- Water potential
- Negative potential
- Pressure potential
- Solute potential
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