Q. No.The net reaction of all light-dependent reactions in oxygenic photosynthesis is:
1.
2H2O + 2NAD+ + 3ADP + 3Pi \(\rightarrow\) O2 + 2NADH + 3ATP
2.
2H2O + 3NAD+ + 2ADP + 3Pi \(\rightarrow\) O2 + 3NADH + 2ATP
3.
2H2O + 2NADP+ + 3ADP + 3Pi \(\rightarrow\) O2 + 2NADH + 3ATP
4.
2H2O + 3NADP+ + 2ADP + 3Pi \(\rightarrow\) O2 + 3NADH + 3ATP
The higher the energy in photons,
1. the longer their wavelengths
2. the shorter their wavelengths
3. the lesser will be the rate of photosynthesis
4. the larger will be the photorespiratory loss
The diagram shows the famous Engelmann experiment that helped us understand important aspects of the process of photosynthesis. What conclusion can be drawn by the pattern of accumulation of aerobic bacteria shown in the diagram?
| 1. | Excess carbon dioxide is released by the alga in the area of accumulation. |
| 2. | Only red and violet lights are effective for photosynthesis. |
| 3. | In the areas of accumulation, most oxygen was liberated by the alga. |
| 4. | Bacteria are attracted to red and blue light. |
The electrons excited to higher energy levels during photosynthesis belong to:
| 1. | Water | 2. | RuBP |
| 3. | glucose | 4. | chlorophyll |
The source of hydrogen most probably used by the earliest photosynthesizers was:
1. Hydrogen sulfide
2. Water
3. Methane
4. Glucose
The Engelmann experiment shown in the given diagram helped to understand the relationship between:
| 1. | bacteria and the alga used in the experiment. |
| 2. | the rate of respiration in aerobic bacteria and wavelengths of light. |
| 3. | wavelengths of light and the oxygen released during photosynthesis. |
| 4. | rates of oxygen liberation by alga and carbon dioxide liberated by the bacteria. |
Identify the incorrectly matched pair:
| 1. | PS I | P700 is reaction center |
| 2. | RuBP | 5 carbon compound |
| 3. | PS II | P680 is reaction center |
| 4. | C3 plants | Kranz anatomy |
The given diagram shows the scheme of:
| 1. | Cyclic photophosphorylation and Y is NADPH |
| 2. | Cyclic photophosphorylation and Y is ATP |
| 3. | Non-Cyclic photophosphorylation and Y is NADPH |
| 4. | Non-Cyclic photophosphorylation and Y is ATP |
If you ran the Engelmann experiment without passing light through a prism, what would you predict?
1. The results will be unaffected.
2. Even distribution along the length.
3. Accumulation only in red wavelength zone.
4. More cluster in the middle than at the ends.
The correct statements about photosynthesis include:
| I: | the light-dependent reactions can occur only in the light, the light-independent reactions only in the dark |
| II: | photorespiration is more efficient at producing glucose than is photosynthesis |
| III: | the light-dependent reactions produce the energy-rich compounds that are used to run the light-independent reactions |
| 1. | I only | 2. | III only |
| 3. | I and III only | 4. | II and III only |
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