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 |
Stroma in the chloroplasts of higher plants contains:
1. light-independent reaction enzymes
2. light-dependent reaction enzymes
3. ribosomes
4. chlorophyll
Cyclic -photophosphorylation results in the formation of:
1. NADPH
2. ATP and NADPH
3. ATP, NADPH, and O2
4. ATP
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 |
1. cytochrome-b
2. cytochrome-f
3. quinone
4. ferredoxin
In the leaves of C4 plants, malic acid formation during CO2 fixation occurs in the cells of:
1. mesophyll
2. bundle sheath
3. phloem
4. epidermis
The first acceptor of electrons from an excited chlorophyll molecule of photosystem II is:
1. | cytochrome | 2. | iron-sulphur protein |
3. | ferredoxin | 4. | quinone |
1. | high energy bonds are formed in mitochondrial proteins |
2. | ADP is pumped out of the matrix into the inter-membrane space |
3. | a proton gradient forms across the inner membrane |
4. | there is a change in the permeability of the inner mitochondrial membrane toward Adenosine Diphosphate (ADP) |
In photosystem-I, the first electron acceptor is:
1. ferredoxin
2. cytochrome
3. plastocyanin
4. an iron-sulphur protein