Q. No.Blackman's law is related to
(1) respiration
(2) transpiration
(3) root pressure
(4) photosynthesis.
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. |
Photorespiration shows formation of
| 1. | sugar but not ATP |
| 2. | ATP but not sugar |
| 3. | both ATP and sugar |
| 4. | neither ATP nor sugar |
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.
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 |
The C4 plants differ from C3 plants with reference to the:
| 1. | substrate that accepts CO2 in carbon assimilation |
| 2. | type of end product |
| 3. | type of pigment involved in photosynthesis |
| 4. | end product that will be formed |
Photosynthesis is a-
a. Biochemical process
b. Physical process
c. Chemical process
d. Physico-chemical process
Which of the following statements does not justify the importance of photosynthesis?
| 1. | it is the primary source of all food on earth. |
| 2. | it is responsible for the release of oxygen into the atmosphere. |
| 3. | it is responsible for the water balance on earth. |
| 4. | use of energy from sunlight by plants doing photosynthesis is the basis of life on earth. |
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