Q. No.The reaction that is responsible for the primary fixation of CO2 is catalysed by
1. RUBP carboxylase
2. PEP carboxylase
3. RuBP carboxylase and PEP carboxylase
4. PGA synthase
When CO2 is added to PEP, the first stable product synthesized is
1. pyruvate
2. glyceraldehyde-3-phosphate
3. phosphoglycerate
4. oxaloacetate
Splitting of water is associated with
1. photosystem I
2. lumen of thylakoid
3. both photosystems I and II
4. inner side of thylakoid membrane
Read the following four statements A, B, C and D and select the right option having both correct statements:
STATEMENTS:
| (A) | Z-scheme of light reaction takes place in the presence of PSI only |
| (B) | Only PSI functional in cyclic photophosphorylation |
| (C) | Cyclic photophosphorylation results in a synthesis of ATP and NADPH2 |
| (D) | Stroma lamellae lack PSII as well as NADP |
Options:
1. A and B
2. B and C
3. C and D
4. B and D
In Kranz anatomy, the bundle sheath cells have:
| 1. | thick walls, many intercellular spaces and few chloroplasts |
| 2. | thin walls, many intercellular spaces and no chloroplasts |
| 3. | thick walls, no intercellular spaces and a large number of chloroplasts |
| 4. | thin walls, no intercellular spaces and several chloroplasts |
Chemiosmotic theory of ATP synthesis in the chloroplasts and mitochondria is based on:
1. Membrane potential
2. Accumulation of K ions
3. Proton gradient
4. Accumulation of Na ions
Mark the odd one (with respect to internal factors affecting photosynthesis)
1. Amount of chlorophyll
2. Light intensity
3. Mesophyll cells
4. Orientation of leaves
Photosynthetically active radiation (PAR) represents the following range of wavelengths:
1. 450-950 nm
2. 340-450 nm
3. 400-700 nm
4. 500-600 nm
The first step for initiation of photosynthesis will be:
| 1. | Photolysis of water |
| 2. | Excitement of chlorophyll molecule due to absorption of light |
| 3. | ATP formation |
| 4. | Glucose formation |
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