Q. No.Photorespiration shows formation of
1.
sugar but not ATP
2.
ATP but not sugar
3.
both ATP and sugar
4.
neither ATP nor sugar
Kranz anatomy is usually associated with
| 1. | C3 plants |
| 2. | C4 plants |
| 3. | CAM plants |
| 4. | C3-C4 intermediate plants. |
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. |
The first carbon dioxide fixation product of C4 plant is
| 1. | Oxaloacetic acid | 2. | ribulose biphosphate |
| 3. | phosphoenol pyruvate | 4. | phosphoglyceric acid. |
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.
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 |
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. |
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 |
In blue-green algae, photosystem- II contains important pigment concerned with photolysis of water. It is a
1. phycocyanin
2. cytochrome-c
3. chlorophyll -
4. -carotene
In Kranz anatomy, the bundle sheath cells have
| 1. | thin walls, many intercellular space and no chloroplast |
| 2. | thick walls, no intercellular spaces and large number of chloroplasts |
| 3. | thin walls, no intercellular spaces and several chloroplasts |
| 4. | thick walls, many intercellular space and few chloroplasts |
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