Q. No.A plant in your garden avoids photorespiratory losses, has improved water use efficiency, shows high rates of photosynthesis at high temperatures and has improved efficiency of nitrogen utilization. In which of the following physiological groups would you assign this plant?
(1) C4
(2) CAM
(3) Nitrogen-fixer
(4) C3
Emerson's enhancement effect and red drop have been instrumental in the discovery of
1. two photosystems operating simultaneously
2. photophosphorylation and cyclic electron transport.
3. Oxidative phosphorylation
4. photophosphorylation and non-cyclic electron transport
In a chloroplast the highest number of protons are found in
1. lumen of thylakoids
2. inter membrane space
3. antenna complex
4. Stroma
In photosynthesis, the light-independent reactions take place at
1. thylakoid lumen
2. photosystem l
3. photosystem ll
4. stromal matrix
Anoxygenic photosynthesis is characteristic of
1. Rhodospirillum
2. Spirogyra
3. Chlamydomonas
4. Ulva
The correct sequence of cell organelles during photorespiration is
(1) chloroplast-Golgi bodies-mitochondria
(2) chloroplast-rough endoplasmic reticulum-dictyosomes
(3) chloroplast-peroxisome-mitochondria
(4) chloroplast-vacuole-peroxisome
PGA as the first CO2 fixation was discovered in the photosynthesis of
(1) bryophyte
(2) gymnosperm
(3) angiosperm
(4) algae
C4 -plants are more efficient in photosynthesis than C3 -plants due to
| 1. | higher leaf area |
| 2. | presence of larger number of chloroplasts in the leaf cells. |
| 3. | presence of thin cuticle |
| 4. | lower rate of photorespiration |
The C4 -plants are photosynthetically more efficient than C3 -plants because
| 1. | the CO2 compensation point is more |
| 2. | CO2 generated during photorespiration is trapped and recycled through PEP carboxylase |
| 3. | the CO2 efflux is not prevented |
| 4. | they have more chloroplasts. |
Electrons from excited chlorophyll molecule of photosystem-II are accepted first by
1. cytochrome-b
2. cytochrome-f
3. quinone
4. ferredoxin
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