Kranz anatomy is usually associated with
| 1. | C3 plants |
| 2. | C4 plants |
| 3. | CAM plants |
| 4. | C3-C4 intermediate plants. |
Subtopic: Â C4 Plants Examples |Â Question on C4 Pathway |
 92%
Level 1: 80%+
AIIMS - 2012
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Which of the following statements is correct?
| 1. | Photorespiration is useful process. |
| 2. | C4 plants are more efficient than C3 plants. |
| 3. | C4 plants are less efficient than C3 plants. |
| 4. | Photorespiration is absent in C3 plants but present in C4 plants. |
Subtopic: Â Photorespiration |Â Questions on Photorespiration |
 89%
Level 1: 80%+
AIIMS - 2011
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Carbon dioxide is necessary for photosynthesis. The chemical used to remove this gas most effectively from entering a control apparatus is
1. calcium oxide
2. distilled water
3. potassium hydroxide solution
4. sodium carbonate.
Subtopic: Â Historical View: Experiments |
 86%
Level 1: 80%+
AIIMS - 2015
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C4 plants have better productivity because
| 1. | C4 plants absorb more light |
| 2. | C4 plants absorb more CO2 |
| 3. | C4 plants does not carry photorespiration |
| 4. | C4 plants have more amount of RuBisCO. |
Subtopic: Â C4 Plants Examples |Â Question on C4 Pathway |
 84%
Level 1: 80%+
AIIMS - 2013
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Which of the following is incorrect about the light reactions of photosynthesis?
| 1. | P680 and P700 are the reaction centres of PS-I and PS-II respectively |
| 2. | Light energy provides energy for the photolysis of water through excitation of the reaction centre of PS-II |
| 3. | NADPH is not produced in cyclic electrons transport in light reactions |
| 4. | Reactions of the two photosystems are needed for the reduction of NADP |
Subtopic: Â Light Reactions :3 |Â Light Reactions |
 83%
Level 1: 80%+
AIIMS - 2016
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The first carbon dioxide fixation product of C4 plant is
| 1. | Oxaloacetic acid | 2. | ribulose biphosphate |
| 3. | phosphoenol pyruvate | 4. | phosphoglyceric acid. |
Subtopic: Â C4 Cycle (Hatch & Slack Pathway) |
 80%
Level 1: 80%+
AIIMS - 2015
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Photorespiration shows formation of
| 1. | sugar but not ATP |
| 2. | ATP but not sugar |
| 3. | both ATP and sugar |
| 4. | neither ATP nor sugar |
Subtopic: Â Photorespiration |
 76%
Level 2: 60%+
AIIMS - 2012
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The chemiosmotic coupling hypotheisis of oxidative phosphorylation proposes that adenosine triphosphate (ATP) is formed because
| 1. | a proton gradient forms across the inner mitochondrial membrane. |
| 2. | There is a change in the permeability of the inner mitochondrial membrane towards adenosine diphosphate (ADP). |
| 3. | high energy bonds are formed in mitochondrial proteins |
| 4. | ADP is pumped out of the matrix into the intermembrane space. |
Subtopic: Â Light Reactions :3 |Â Light Reactions |
 73%
Level 2: 60%+
AIIMS - 2016
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Subtopic: Â Photosystems |
 72%
Level 2: 60%+
AIIMS - 2011
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Photosynthesis in C4 plants is relatively less limited by atmospheric CO2 levels because
| 1. | The primary fixation of CO2 is mediated via PEP carboxylase |
| 2. | Effective pumping of CO2 into bundle sheath cells |
| 3. | Four carbon acids are the primary initial CO2 fixation products |
| 4. | RuBisCO in C4 plants has a higher affinity for CO2 |
Subtopic: Â Dark Reaction: Biosynthetic Phase |
Level 3: 35%-60%
AIIMS - 2016
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