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Phytochrome is a...

Phytochrome is a

A

flavoprotein

B

glycoprotein

C

lipoprotein

D

chromoprotein

Text Solution

Verified by Experts

The correct Answer is:
D
Phytochrome is a chromoprotein, which exists in two forms, `P_(r)` and `P_("fr")`. These forms are interconvertible. When plants get red light this protein gets converted into `P_("fr")` from `P_(r)` and vice versa. It controls the photoperiodism in the plants.
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Consider the following statements and select the correct option stating which one is true(T) and which one is false (F) i) Vemalisation can help in shortening the juvenile or vegetative period of plant and bring early flowering ii) Phytochrome is a pigment protein complex which exists in two inter-convertible forms - P_r and P iii) Sugar beet flowers after getting the inductive cycle of long dark periods and short photoperiods iv) 2,4-D acts as weedicide to remove broad leaved weeds. V) Auxins promote growth of lateral buds whereas cytokinins inhibit it

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ARIHANT NEET-PLANT GROWTH AND DEVELOPMENT -CHAPTER EXERCISES (MEDICAL ENTRANCES GALLERY )
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  2. Phytochrome is a

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  3. The Avena curvature is used for bioassay of

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  4. Identify the correct pair of combination (i) Zeatin - adenine deriva...

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  5. Assertion (A). Ethylene induces ripening Reason (R). Ethylene is a g...

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  6. One hormone hastens maturity period in juvenile conifers, a second hor...

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  7. Which of the following statements regarding photoperiodism is false

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  8. One hormone stimulates the closure of stomata and another one influenc...

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  9. Which one is correct for blooming of short day plants

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  10. The hormone which reduces transpiration rate by inducing stomatal clos...

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  11. Which of the following is a dicot weedicide

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  12. A few normal seedlings of tomato were kept in a dark room. After few d...

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  13. Which is not the effect of ethylene ?

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  14. Dr. F. Went noted that is coleoptile tips were removed and placed on a...

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  15. In flowering plants, the site of perception of light/dark duration is

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  16. If a plant produces flowers when exposed to alternating periods of 5 h...

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  17. Spraying sugarcane crop with a plant hormone increases length of plant...

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  18. Cells attaining their maximum size in terms of wall thickening and pro...

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  19. During seed germination its stored food is mobilised by

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  20. Movement of tendrils in response to touch is known as

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