Plant Growth And Mineral Nutrition Subtopics For MHT-CET .
- Plant Growth
- Phases Of Growth
- Condition For Growth
- Growth Rates And Types Of Growth
- Growth Curve
- Differentiation , De-differentiation, Re-differentiation
- Development
- Plasticity
- Growth Hormones
- Photoperiodism
- Vernalization (yarovization)
- Mineral nutrition
- Nitrogen cycle
- Seed germination
Multiple Choice Questions For Biology MHT-CET
Q1. Abscisic acid (ABA) promotes:
A. Cell division
B. Leaf fall
C. Germination
D. Cell elongation
Correct Answer(B)
Q2. The influence of light on flowering is known as:
A. Photoperiodism
B. Phototropism
C. Photo-oxidation
D. Vernalization
Correct Answer(A)
Q3. Photoperiodism was discovered in Maryland Mammoth variety of _______ plant.
A. Rice
B. Tomato
C. Wheat
D. Tobacco
Correct Answer(D)
Q4. A chemical believed to be involved in flowering is :
A. Gibberellin
B. Kinetin
C. Florigen
D. IBA
Correct Answer(C)
Q5. Photoperiodic stimulus is perceived by:
A. Leaves
B. Flowers
C. Buds
D. Meristem
Correct Answer(A)
Q6. Which factor of light has profound effect on flowering in higher plants?
A. Intensity
B. Quality
C. Duration
D. All of these
Correct Answer(C)
Q7. When the dark period of short day plants is interrupted by a brief exposure of light, the plant:
A. Will not flower at all
B. Flowers immediately
C. Gives more flowers
D. Turns into a long day plant
Correct Answer(A)
Q8. _________ plants require exposure to light greater than their critical photoperiod for initiation of flowering.
A. Short day plants
B. Day -neutral plants
C. Long day plants
D. Juvenile plants
Correct Answer(C)
Q9. Which of the following is a long day plant?
A. Wheat
B. Soyabean
C. Dahlia
D. Xanthium
Correct Answer(A)
Q10. Which of the following plant is as SDP?
A. Spinach
B. Soyabean
C. Wheat
D. Radish
Correct Answer(B)
Q11. Short night plants are:
A. Long day plants
B. Short day plants
C. Day neutral plants
D. None of the above
Correct Answer(A)
Q12. All the given below are day neutral plants, except:
A. Sunflower
B. Cucumber
C. Balsam
D. Spinach
Correct Answer(D)
Q13. Pigment protein taking part in photo-perception of flowering is:
A. Carotene
B. Phytochrome
C. Cytochrome
D. Lycopene
Correct Answer(B)
Q14. Phytochromes are active in:
A. Blue light
B. Green light
C. Red light
D. None of these
Correct Answer(C)
Q15. Vernalisation is also called as:
A. Photomorphogenesis
B. Scarification
C. Yarovisation
D. degreening
Correct Answer(C)
Q16. Vernalization shortens the ____________ phase of plants.
A. vegetative
B. Reproductive
C. Flowering
D. Cell elongation
Correct Answer(A)
Q17. Highest concentration of auxin exist:
A. At the base of various plant organs
B. In growing tip of plants
C. In leaves
D. In xylem and phloem cells only
Correct Answer(B)
Q18. For rooting on leaves of bryophyllum, the growth regulator used is:
A. IAA
B. Ethylene
C. Carotene
D. ABA
Correct Answer(A)
Q19. Specific property attributed to gibberellins is:
A. Shortening of genetically tall plants
B. Elongation of genetically dwarf plants
C. Promotion of rooting
D. Yellowing of young leaves
Correct Answer(B)
Q20. The gibberellins are plant growth hormones. They cause elongation of stems. Gibberellin was first isolated by Japanese workers from:
A. Endosperm of barley
B. Sporophyte of moss
C. A parasitic fungus
D. Scutellum of rice
Correct Answer(C)
Q21. Physiological function not influenced by a ABA is:
A. Abscission
B. Senescence
C. Dormancy
D. Flowering
Correct Answer: (D)
Q22. ABA is called as ________ ,because it inhibits growth which is stimulated by gibberellin.
A. Stress hormone
B. Non-gibberellin
C. Secondary hormone
D. Anti-gibberellin
Correct Answer: (D)
Q23. Some early experiments on phototropic curvature in grasses led to the discovery of:
A. Auxins
B. Gibberellin
C. Cytokinins
D. Ethylene
Correct Answer: (A)
Q24. Abscission layer is formed when the concentration of:
A. Auxin increases
B. Auxin decreases
C. Gibberellin decreases
D. Gibberellin increases
Correct Answer: (B)
Q25. Chrysanthemum flowers either in late summer or in winter because it is a:
A. Short day plant
B. Long day plant
C. Day neutral plant
D. Midday plant
Correct Answer: (A)
Q26. The avena curvature is used as bioassay of:
A. IAA
B. Ethylene
C. ABA
D. GA3
Correct Answer: (A)
Q27. Auxin can be bioassayed by:
A. Lettuce hypocotyl elongation
B. Avena coleoptile curvature
C. Hydroponics
D. Potometer
Correct Answer: (B)
Q28. Select and appropriate plant hormone responsible for apical dominance from the following:
A. Auxin
B. Ethylene
C. Gibberellin
D. Cytokinins
Correct Answer: (A)
Q29. Which one of the following is a diox weedicide?
A. 2,4-D
B. NAA
C. IBA
D. IAA
Correct Answer: (A)
Q30. The phenomenon called 'Apical dominance' in plants is due to phytohormone:
A. Cytokinins
B. Auxins
C. ABA
D. Gibberellin
Correct Answer: (B)
Q31. Fruit and leaf drop at early stages can be prevented by the application of ?
A. Cytokinins
B. Ethylene
C. Auxins
D. Gibberellic acid
Correct Answer: (C)
Q32. The aleurone synthesises and secretes digestive enzymes that hydrolyze nutrients stored in the endosperm ,in presence of:
A. Auxin
B. Gibberellin
C. Cytokinin
D. Ethylene
Correct Answer: (B)
Q33. Which hormone is spread to increase the length of stem in sugarcane crop ?
A. Ethylene
B. Cytokinin
C. Gibberellin
D. ABA
Correct Answer: (C)
Q34. Elongation of internode is caused by:
A. Ethylene
B. Gibberellin
C. Abscisic acid
D. Cytokinin
Correct Answer: (B)
Q35. During seed germination, it's stored food is mobilized by:
A. Ethylene
B. Cytokinins
C. ABA
D. Gibberellin
Correct Answer: (D)
Q36. In order to increase the yield of sugarcane crop which of the following plant growth regulator should be spread?
A. Cytokinins
B. Ethylene
C. Auxins
D. Gibberellin
Correct Answer: (D)
Q37. Which one of the following growth regulators is known as 'stress hormones' ?
A. Abscisic acid
B. Ethylene
C. GA3
D. Indole acetic acid
Correct Answer: (A)
Q38. What is the site of perception of photoperiod necessary for induction of flowering in plants ?
A. Shoot apex
B. Leaves
C. Lateral buds
D. Pulvinus
Correct Answer: (B)
Q39. If a plant produces flowers when exposed only to alternating periods of 5 hours light and 3 hours dark in 24 hour cycle, then the plant should be a _________.
A. Short day plant
B. Long day plant
C. Short-long day plant
D. Day neutral plant
Correct Answer: (B)
Q40. Phytochrome is a:
A. Chromoprotein
B. Flavoprotein
C. Glycoprotein
D. Lipoprotein
Correct Answer: (A)
Q41. Vernalization promotes flowering by:
A. Low temperature
B. High temperature
C. Prolonged photoperiod
D. Short photoperiod
Correct Answer: (A)