In photosynthesis, the light-independent reactions take place at 

1. thylakoid lumen 

2. photosystem l

3. photosystem ll

4. stromal matrix

Subtopic:  Light Reactions :1 | Light Reactions |
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Anoxygenic photosynthesis is characteristic of 

(1) Rhodospirillum

(2) Spirogyra

(3) Chlamydomonas 

(4) Ulva

Subtopic:  Photosynthetic Pigments |
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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

 

Subtopic:  Photorespiration |
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PGA as the frist CO2 fixation was discovered in photosynthesis of 

(1) bryophyte

(2) gymnosperm

(3) angiosperm

(4) algae

Subtopic:  Light Reaction: Electron Transport | Light Reaction: Photophosphorylation |
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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

Subtopic:  C4 Plants Examples | Question on C4 Pathway |
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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.

Subtopic:  C4 Plants Examples | Question on C4 Pathway |
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Electrons from excited chlorophyll molecule of photosystem-II are accepted first by

1. cytochrome-b

2. cytochrome-f

3. quinone

4. ferredoxin

Subtopic:  Photosystems |
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In the leaves of C4 -plants malic acid synthesis during CO2 fixation occurs in 

(1) epidermal cells

(2) mesophyll cells

(3) bundle sheath

(4) guard cells

Subtopic:  C4 Plants Examples | Question on C4 Pathway |
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The wavelength of light abosorbed by Pr form of phytochrome is :

(1) 640 nm

(2) 680 nm

(3) 720 nm

(4) 620 nm

Subtopic:  Photosystems |
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In photosystem-I, the first electron acceptor is :

(1) ferredoxin

(2) cytochrome

(3) plastocyanin

(4) an iron-sulphur protein

Subtopic:  Photosystems |
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