Q. No.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. |
The half-leaf experiment, where a part of the leaf is enclosed in a test tube containing some KOH soaked cotton was performed, which showed that _________ was required for photosynthesis?
a. Light
b. Chlorophyll
c. CO2
d. O2
Match the scientists in Column I with their contributions in Column II:
| Column I (Scientist) | Column II (Contribution) |
|---|---|
| i. Jan Ingenhousz | a. Discovery of oxygen (O₂) |
| ii. Joseph Priestley | b. Plants restore to the air whatever breathing animals and burning candles remove |
| iii. T.W. Engelmann | c. Showed that only the green part of the plants could release oxygen |
| iv. Julius von Sachs | d. Discovery of production of glucose in plants |
| e. First action spectrum of photosynthesis | |
| f. Used a prism to split light into its spectral components and then illuminated Cladophora placed in a suspension of aerobic bacteria |
Choose the option with the correct matching:
a. i → c; ii → b; iii → a, e, f; iv → d
b. i → a, b; ii → c; iii → d; iv → e, f
c. i → a; ii → b; iii → c, e; iv → f
d. i → c; ii → a, b; iii → e, f; iv → d
Cornelius van Niel, who, based on his studies demonstrated that photosynthesis is essentially a light-dependent reaction performed his experiments on-
1. Cladophora
2. purple and green bacteria
3. green algae
4. Non sulphur bacteria
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