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Transport of Molecules in Plant MCQ Questions & Answers

Transport of Molecules in Plant MCQs : This section focuses on the "Transport of Molecules in Plant". These Multiple Choice Questions (MCQs) should be practiced to improve the Transport of Molecules in Plant skills required for various interviews (campus interview, walk-in interview, company interview), placement, entrance exam and other competitive examinations.

Question 1

A widely accepted explanation for transport of sugar in phloem is called

A. root pressure theory
B. transpiration
C. pressure flow hypothesis
D. cytoplasmic streaming

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Question 2

Phloem is composed of

A. vessel elements and companion cells
B. tracheids and vessel elements
C. sieve-tube elements and companion cells
D. tracheids and sieve-tube elements

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Question 3

The movement of most minerals, including potassium into root cells is by

A. osmosis
B. diffusion
C. bulk flow
D. active transport

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Question 4

The evaporation of water from leaves is called

A. transpiration
B. cohesion
C. tension
D. pressure flow

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Question 5

Normally CO2 and O2 enter a plant by

A. osmosis
B. active transport
C. diffusion
D. evaporation

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Question 6

The cohesion-tension theory of water movement helps to explain how water moves from soil into root?

A. Through the phloem
B. From leaf to root
C. Through the xylem
D. Into the guard cells

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Question 7

When guard cells swell

A. stomata close
B. stomata open
C. photosynthesis stops
D. evaporation stops

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Question 8

Water moves into roots of plants by

A. osmosis
B. active transport
C. diffusion
D. pressure flow mechanism

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Question 9

The sugar and other organic molecules are transported through the plant by means of a special layer of tissue called phloem.

A. True
B. False

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Question 10

Phloem is composed of living cells that transport a water solution of sugars that we commonly call sap.

A. True
B. False

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