Which of the following statements is incorrect?
1.
Grana lamellae have both PSI and PS II.
2.
Cyclic photophosphorylation involves both PS I and PS II.
3.
Both ATP and NADPH+H+ are non-cyclic synthesized during photophosphorylation.
4.
Stroma lamellae have PS I only and lack NADP reductase.
Both C4 and CAM plants employ physiological and biochemical strategies to reduce photorespiration. Which of the following is an accurate comparison of the two strategies?
1. C4 plants fix CO2 as the 4-carbon acid oxaloacetate, while CAM plants fix CO2 as the 5-carbon acid ribulose 1, 5-bisphosphate.
2. C4 plants fix CO2 in the mesophyll but carry out the Calvin cycle in the bundle sheath, while CAM plants fix CO2 and carry out the Calvin cycle in the mesophyll.
3. C4 plants fix CO2 in the bundle sheath but carry out the Calvin cycle in the mesophyll, while CAM plants fix CO2 and carry out the Calvin cycle in the bundle sheath.
4. C4 plants store CO2 as phosphoglycolate, while CAM plants store CO2 as oxaloacetate.
5. C4 plants carry out photosynthetic electron transport in the daytime, while CAM plants carry out photosynthetic electron transport at night.
The first stable product of CO2 fixation in sorghum is:
1. Succinic acid
2. Phosphoglyceric acid
3. Pyruvic acid
4. Oxaloacetic acid
Study the pathway given below:
In which of the following options, correct words for all the three blanks A, B and C are indicated?
| A | B | C | |
| 1. | Fixation | Transamination | Regeneration |
| 2. | Fixation | Decarboxylation | Regeneration |
| 3. | Carboxylation | Decarboxylation | Reduction |
| 4. | Decarboxylation | Reduction | Regeneration |
During non-cyclic photophosphorylation, when electrons are lost from the reaction center at PS II, what is the source which replaces these electrons?
| 1. | Oxygen | 2. | Water |
| 3. | Carbon dioxide | 4. | Light |
| I: | Current availability of carbon dioxide levels is limiting to the C4 plants. |
| II: | C3 plants have a much lower temperature optimum than C4 plants. |
| 1. | Only I is correct | 2. | Only II is correct |
| 3. | Both I and II are correct | 4. | Both I and II are incorrect |
1. May form several layers around the vascular bundle
2. Have large number of chloroplasts
3. Have thick walls impervious to gaseous exchange
4. Large intercellular spaces are seen
| COLUMN I | COLUMN II | ||
| A | Jan Ingenhousz | P | Provided evidence for production of glucose when plants grow |
| B | T. W Engelmann | Q | Described the first action spectrum for photosynthesis |
| C | Julius von Sachs | R | Showed that sunlight is essential for photosynthesis |
| D | Cornelius van Neil | S | Inferred that oxygen evolved in photosynthesis comes from water and not from carbon dioxide |
| A | B | C | D | |
| 1. | R | Q | P | S |
| 2. | Q | R | S | P |
| 3. | P | S | R | Q |
| 4. | S | P | Q | R |
| I: | include chlorophyll b, xanthophylls and carotenoids. |
| II: | absorb light and transfer electrons to chlorophyll a. |
| III: | protect chlorophyll a from photo-oxidation. |
2. Only I and III are correct
3. Only II and III are correct
4. I, II and III are correct
| 1. | PS I | 2. | Oxygen |
| 3. | Water | 4. | Carbon dioxide |
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