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Plant Growth Questions: Paper - 02 |
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Sr. No. |
Questions |
Answers |
| 1. |
The phase of growth which is the first phase and represents lag phase of growth curve is
(A) Formative phase
(B) Cell enlargement phase
(C) Maturation phase
(D) Stationery phase
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Answer: (A) |
| 2. |
The lateral meristem in plant is reponsible for
(A) Primary growth
(B) Secondary growth
(C) Exponential growth
(D) Growht in elongation
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Answer: (B) |
| 3. |
Plant growth can be measured by
(A) Horizontal microscope
(B) Crescograph
(C) Auxanometer
(D) All the above
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Answer: (D) |
| 4. |
The rate of growth is called as
(A) Growing index
(B) Increasing index
(C) Effective index
(D) Efficiency index
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Answer: (D) |
| 5. |
Which of the following shows secondary growth?
(A) Monocots
(B) Dicots
(C) Ferns
(D) Mosses
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Answer: (B) |
| 6. |
Growth can be measured in terms of
(A) Fresh or fry weight increase
(B) Increase in girth of stem
(C) Increase is surface area of leaf
(C) All the above
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Answer: (D) |
| 7. |
Auxins were first isolated form the plants by
(A) Darwin
(B) F.W.Wend
(C) Boysen-Jensen
(D) Sachs
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Answer: (B) |
| 8. |
Apical dominance is due to
(A) Abcisic acid
(B) Gibberelic acid
(C) Auxin
(D) Cytokinin
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Answer: (C) |
| 9. |
Harmone related with cell divisions is
(A) NAA
(B) IAA
(C) Cytokinin
(D) GA3
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Answer: (C) |
| 10. |
Which of the following harmone is mainly concerned with root Initiation?
(A) Kinetin
(B) GA3
(C) IAA
(D) ABA
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Answer: (C) |
| 11. |
Primary precursor of IAA is
(A) Methionine
(B) Adenine
(C) Tryptophan
(D) Alanine
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Answer: (C) |
| 12. |
Avena-Curvature biossay was conducted by
(A) Went
(B) Pal
(C) Darwin
(D) Boysen-Jenson
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Answer: (A) |
| 13. |
Which one of the following grooups comprises synthetic auxin?
(A) 2, 4-D; 2, 4, 5, -T and Zeatin
(B) Gibberellic acid, ABA, IAA
(C) 2, 4-D, 2, 4, 5 – T and NAA
(D) Cytokinin, IAA, IBA
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Answer: (C) |
| 14. |
Which property is specifically attributed to gibberellins?
(A) Apical bud growth inhibition
(B) Root initiation in stem cuttings
(C) Elongation of genetically dwarf plants
(D) Act as selective weedicide
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Answer: (C) |
| 15. |
Cytokinins are the derivatives of
(A) Purine base guanine
(B) Purine base adenine
(C) Pyrimidine base cytosine
(D) Both(A) and(B)
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Answer: (B) |
| 16. |
Richmond-Lang effect is shown by
(A) Auxin
(B) Gibberellin
(C) Cytokinin
(D) Ethylene
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Answer: (C) |
| 17. |
The ripening harmone is
(A) Auxin
(B) Ethylene
(C) GA
(D) ABA
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Answer: (B) |
| 18. |
The photoperiodic stimulus perceived by
(A) Leaves
(B) Buds
(C) Meristem
(D) Flowers
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Answer: (A) |
| 19. |
Garner and Allard are credited for discovery of
(A) Phototropism
(B) Photoperiodism
(C) Phtorespiraton
(D) Photomorphogenesis
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Answer: (B) |
| 20. |
Which of the following can stop flowring in short day plants
(A) Longer but discontinuous dark period
(B) Photopertiod longer than critical duration
(C) Very short period
(D) Any of these
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Answer: (D) |