In photosynthesis, the light-independent reactions take place at

1. thylakoid lumen 2. photosystem l
3. photosystem ll 4. stromal matrix

Subtopic:  Dark Reaction: Biosynthetic Phase |
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The structures that are formed by stacking of organised flattened membranous sacs in the chloroplasts are

1.cristae2.grana
3.stroma lamellae4.stroma
Subtopic:  Chloroplast Structure |
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Anoxygenic photosynthesis is characteristic of
1. Rhodospirillum
2. Spirogyra
3. Chlamydomonas
4. Ulva

Subtopic:  Introduction |
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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 |
 83%

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PGA, as the first CO2 fixation product, was discovered in photosynthesis of
1. bryophyte
2. gymnosperm
3. angiosperm
4. alga

Subtopic:  Dark Reaction : Calvin Cycle |
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C4 -plants are photosynthetically more efficient than C3 -plants because
1. CO2 compensation point is more.
2. CO2 generated during photorespiration is trapped and recycled through PEP carboxylase.
3. CO2 efflux is not prevented.
4. they have more chloroplasts.

Subtopic:  C4 Cycle (Hatch & Slack Pathway) | C4 Plants Examples | Question on C4 Pathway |

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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 Cycle (Hatch & Slack Pathway) |
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Carbohydrates are commonly found as starch in plant storage organs. Which of the following five properties of starch (A-E) make it useful as a storage material?
A. Easily translocated
B. Chemically non-reactive
C. Easily digested by animals
D. Osmotically inactive
E. Synthesized during photosynthesis
The useful properties are
1. (B) and (C)
2. (B) and (D)
3. (A), (C) and (E)
4. (A) and (E)

Subtopic:  Dark Reaction: Biosynthetic Phase |
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The first acceptor of electrons from an excited chlorophyll molecule of photosystem II is :

1.cytochrome2.iron-sulphur protein
3.ferredoxin4.quinone

Subtopic:  Light Reaction: Electron Transport |
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In photosystem-I, the first electron acceptor is :

1.ferredoxin2.cytochrome
3.plastocyanin4.an iron-sulphur protein

Subtopic:  Light Reaction: Electron Transport |

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