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Biotechnology
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Transport of Molecules in Plant
Comments
Question
Phloem is composed of
Options
A. vessel elements and companion cells
B. tracheids and vessel elements
C. sieve-tube elements and companion cells
D. tracheids and sieve-tube elements
Correct Answer
sieve-tube elements and companion cells
Transport of Molecules in Plant problems
Search Results
1. The evaporation of water from leaves is called
Options
A. transpiration
B. cohesion
C. tension
D. pressure flow
Show Answer
Scratch Pad
Discuss
Correct Answer: transpiration
2. The cohesion-tension theory of water movement helps to explain how water moves from soil into root?
Options
A. Through the phloem
B. From leaf to root
C. Through the xylem
D. Into the guard cells
Show Answer
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Discuss
Correct Answer: Through the xylem
3. When guard cells swell
Options
A. stomata close
B. stomata open
C. photosynthesis stops
D. evaporation stops
Show Answer
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Discuss
Correct Answer: stomata open
4. Water moves into roots of plants by
Options
A. osmosis
B. active transport
C. diffusion
D. pressure flow mechanism
Show Answer
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Discuss
Correct Answer: osmosis
5. The movement of most minerals, including potassium into root cells is by
Options
A. osmosis
B. diffusion
C. bulk flow
D. active transport
Show Answer
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Discuss
Correct Answer: active transport
6. Cell fusion method includes the preparation of large number of
Options
A. plant cells stripped of their cell wall
B. single plant cell stripped of their cell wall
C. plant cells with cell wall
D. cells from different species
Show Answer
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Discuss
Correct Answer: single plant cell stripped of their cell wall
7. Which of the following is considered as the disadvantage of conventional plant tissue culture for clonal propagation?
Options
A. Multiplication of sexually derived sterile hybrids
B. Less multiplication of disease free plants
C. Storage and transportation of propogates
D. Both (b) and (c)
Show Answer
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Discuss
Correct Answer: Storage and transportation of propogates
8. Protoplasts can be produced from suspension cultures, callus tissues or intact tissues by enzymatic treatment with
Options
A. cellulotyic enzymes
B. pectolytic enzymes
C. both cellulotyic and pectolytic enzymes
D. proteolytic enzymes
Show Answer
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Discuss
Correct Answer: both cellulotyic and pectolytic enzymes
9. The ability of the component cells of callus to form a whole plant is known as
Options
A. redifferentiation
B. dedifferentiation
C. either (a) or (b)
D. none of these
Show Answer
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Discuss
Correct Answer: redifferentiation
10. When plated only in nutrient medium, how much time is required for the protoplast to synthesize new cell wall?
Options
A. 2-5 days
B. 5-10 days
C. 10-15 days
D. 15-17 days
Show Answer
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Discuss
Correct Answer: 5-10 days
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