I: | Carbon reactions during photosynthesis in higher plants are called as dark reactions. |
II: | They occur in darkness and they are not light-dependent. |
1. | Both I and II are correct and II explains I |
2. | Both I and II are correct but II does not explain I |
3. | I is correct but II is incorrect |
4. | I is incorrect but II is correct |
Assertion (A): | The term "dark reaction" is considered a misnomer for the Calvin cycle. |
Reason (R): | These reactions do not require darkness to occur, but rather they do not directly require light. |
1. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
2. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
3. | (A) is True but (R) is False. |
4. | (A) is False but (R) is True. |
The pathway:
1. is common to all plants
2. takes place in mesophyll cells in plants
3. takes place in bundle sheath cells in plants
4. does not take place in CAM plants
The reactions of the Calvin cycle can take place as long as which of the following products of the light dependent reactions are available?
1. | Water and Glucose | 2. | Water and ATP |
3. | Oxygen and Carbon dioxide | 4. | ATP and NADPH |
1. | OAA | 2. | PEP |
3. | PGA | 4. | RuBP |
1. | 2 carbon ketose sugar | 2. | 2 carbon aldose sugar |
3. | 5 carbon ketose sugar | 4. | 5 carbon aldose sugar |
Which of the following must occur in the biochemical pathway of Calvin cycle?
1. addition of a pair of electrons from NADPH
2. inactivation of RuBP carboxylase enzyme
3. regeneration of ATP from ADP
4. regeneration of RuBP
The primary function of the Calvin cycle is to:
1. use ATP to release carbon dioxide
2. use NADPH to release carbon dioxide
3. split water and release oxygen
4. fix inorganic carbon to simple sugars
Assertion(A): | The enzyme that catalyses carboxylation of RuBP in Calvin cycle would be more correctly called RuBisCO rather than RuBP carboxylase. |
Reason(R): | This enzyme also has an oxygenation activity apart from a carboxylase activity. |
1. | Both (A) and (R) are True and (R) correctly explains (A). |
2. | Both(A) and (R) are True but (R) does not correctly explain (A). |
3. | (A) is True but (R) is False. |
4. | Both (A) and (R) are False |
1. | Photolysis of water and carbon fixation |
2. | Carbon fixation and oxygenation of RuBP |
3. | ATP synthesis and NADPH formation |
4. | Oxygen evolution and reduction of carbon dioxide |