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CBSE
Class 11 Biology
Transport In Plants
Quiz 1
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Wilting of a plant results from excessive
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respiration
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photosynthesis
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absorption
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transpiration
Explanation
transpiration
Dry seeds kept in water swell due to
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absorption
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diffusion
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imbibition
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none of these
Explanation
imbibition
Which of the following is the unit of ψ?
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Pascal
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Joule
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Newton
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Electron volt
Explanation
Pascal
Which of the following is decreased during increase in humidity in the atmosphere?
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Transpiration
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Photosynthesis
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Respiration
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Glycolysis
Explanation
Transpiration
Two types of molecules cross the membrane in the same direction, it is called as
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Uniport
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Symport
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Antiport
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Multiport
Explanation
Symport
Diffusion rate is affected by
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temperature
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membrane permeability
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gradient of concentration
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all of these
Explanation
all of these
Cells shrink in _________ solution.
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isotonic
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hypotonic
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hypertonic
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hypotonic and hypertonic
Explanation
hypertonic
Which of the following is true about diffusion?
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There is no expenditure of energy.
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Molecules move in Brownian motion.
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Substances moves from the region of higher concentration to the region of lower concentration.
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Diffusion depends on the type of living system.
Explanation
Diffusion depends on the type of living system. Explanation:
Water is lost in a liquid state in some plants through hydathodes. These hydathodes
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do not show any specificity in opening and closing
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remain closed during day
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remain closed at night
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remain always open
Explanation
remain always open
If pressure greater than atmospheric pressure is applied to pure water, the water potential
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increases
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decreases
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remains same
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atmospheric pressure does not affect water potential
Explanation
increases
Choose the correct sequence of water movement in the plants.
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Cortex, protoxylem, endodermis, root hair, pericycle, metaxylem
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Root hair, cortex, endodermis, pericycle, protoxylem, metaxylem
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Root hair, protoxylem, metaxylem, pericycle, cortex, endodermis
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Root hair, pericycle, endodermis, cortex, protoxylem, metaxylem
Explanation
Root hair, cortex, endodermis, pericycle, protoxylem, metaxylem
Cohesion theory of water movement in plants was put forth by
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Henry Dixon
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F. F. Blackman
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Melvin cycle
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Hans. A. Krebs
Explanation
Henry Dixon
When a plant is girdled (ringed)
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the root and shoot die at the same time
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the shoot dies first
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the root dies first
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neither root nor shoot will die
Explanation
the root dies first
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
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A and R are true and R is the correct explanation of A
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A and R are true but R is not the correct explanation of A
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A is true but R is false
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A is false but R is true
Explanation
A is true but R is false
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