Photoperiodism was first characterised in:
Options
(a) tobacco (b) potato (c) tomato (d) cotton
Correct Answer:
tobacco
Explanation:
Photoperiodism is the response to duration and timings of light and dark period. It was first […]
Cyclic photophosphorylation results in the formation of
Options
(a) ATP and NADPH (b) ATP, NADPH and O₂ (c) ATP (d) NADPH
Correct Answer:
ATP
Explanation:
Cyclic photophosphorylation results in the formation of ATP. This […]
The wavelength of light absorbed by Pr form of phytochrome is
Options
(a) 680 nm (b) 720 nm (c) 620 nm (d) 640 nm
Correct Answer:
680 nm
Explanation:
The Pr form absorbs light […]
Of the total incident solar radiation the proportion of PAR is:
Options
(a) about 70% (b) about 60% (c) less than 50% (d) more than 80%
Correct Answer:
less than 50%
Explanation:
Out of […]
Pigment-containing membranous extensions in some cyanobacteria are:
Options
(a) Basal bodies (b) Pneumatophores (c) Chromatophores (d) Heterocysts
Correct Answer:
Chromatophores
Explanation:
In some photoautotrophic bacteria bacteriochlorophyll and bacteriophaeophytin or bacterioviridin pigments containing membraneous extensions […]
Importance of day length in flowering of plants was first shown in
Options
(a) lemna (b) tobacco (c) cotton (d) petunia
Correct Answer:
tobacco
Explanation:
Photoperiodism was first studies by Garner and Allard (1920). […]
A process that makes important difference between C3 and C4 plants is:
Options
(a) Transpiration (b) Glycolysis (c) photosynthesis (d) Photorespiration
Correct Answer:
Photorespiration
Explanation:
Photorespiration is absent is C₄ plants photorespiration does not […]
C₄ plants are more efficient in photosynthesis than C₃ plants due to:
Options
(a) Higher leaf area (b) Presence of larger number of chloroplasts in the leaf cells (c) Presence of thin cuticle (d) […]
Which one of the following is not used for ex-situ plant conservation?
Options
(a) Seed backs (b) Shifting cultivation (c) Botanical Gardens (d) Field gene banks
Correct Answer:
Shifting cultivation
Explanation:
Shifting of Jhum […]
In leaves of C₄ plants malic acid synthesis during CO₂ fixation occurs in
Options
(a) epidermal cells (b) mesophyll cells (c) bundle sheath (d) Guard cells
Correct Answer:
mesophyll cells
Explanation:
In leaves of […]
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