MCQ’S ON PHOTOPERIODISM AND VERNALIZATION
Q. Which of the following hormone can replace vernalization?
(a) Auxin
(b) Ethylene
(c) Cytokinins
(d) Gibberellins
Answer: (d)
Q. When the dark period of short-day plants is interrupted by brief exposure of light, then the plant ______.
(a) Produces more flowers
(b) Will not bear any flowers
(c) Turns into a long day plant
(d)Produces flowers immediately
Answer: (b)
Q. Which of the following pigment involved in red-far red light interconversion?
(a) Cytochrome
(b) Lycopene
(c) Phytochrome
(d) Xanthophyll
Answer: (c)
Q. Cholodny-Went theory is based on________.
(a) Phototropism
(b) Photoperiodism
(c) Photorespiration
(d) Photomorphogenesis
Answer: (a)
Q. ______ influences the process of flowering in plants.
(a) Photoperiod
(b) Water in the soil
(c) The acidity of the soil
(d) Amount of green pigment
Answer: (a)
Q. Phytochrome is a photosensitive pigment involved in _________.
(a) Geotropism
(b) Phototropism
(c) Photoperiodism
(d) Photorespiration
Answer: (c)
Q. In which of the following living species, phytochrome, the blue-green pigment is found?
(a) Algae
(b) Fungi
(c) Flowering plants
(d) Vascular cryptograms
Answer: (c)
Q. The change over from vegetative to reproductive phase in plants takes place in response to______.
(a) Length of the day
(b) severity of temperature
(c) Oxygen content in the air
(d) mainly the food material available in the soil
Answer: (a)
Q. The reversal of etiolation effected by light is called______.
(a) Photomorphogenesis
(b) Richmond Lang effect
(c) Anisotropic wall expansion
(d) Red-far red light interaction
Answer: (a)
Q. A plant that require not less than 10 hours of light to flower is called ______.
(a) Day-neutral plant
(b) Short day plant
(c) Long day plant
(d) None of the above
Answer: (c)
