1. | Joseph Priestley | 2. | Jan Ingenhousz |
3. | Julius von Sachs | 4. | C. B. Van Neil |
1. | Joseph Priestley | 2. | Jan Ingenhousz |
3. | Julius von Sachs | 4. | C. B. Van Neil |
C. B. van Niel proved that:
1. | Plants produce glucose when they grow. |
2. | Blue and red light are effective for photosynthesis. |
3. | It is only the green parts of the plants that could release oxygen. |
4. | Hydrogen from a suitable oxidizable compound reduces carbon dioxide to carbohydrates. |
1. | 6CO2 + 12H2O + light energy → C6H12O6 + 6O2+ 6H2O |
2. | 6CO2 + 6H2O + light energy → C6H12O6 + 6O2 |
3. | CO2 + H2O + light energy → [CH2O] + O2 |
4. | C6H12O6 + 6O2 → 6CO2 + 6H2O |
I: | Carbon reactions during photosynthesis in higher plants are called as dark reactions. |
II: | They occur in darkness and they are not light-dependent. |
1. | Both I and II are correct and II explains I |
2. | Both I and II are correct but II does not explain I |
3. | I is correct but II is incorrect |
4. | I is incorrect but II is correct |
The wavelengths of light most useful in photosynthesis are:
1. | green and orange | 2. | red and blue |
3. | infrared and yellow | 4. | red and green |
I: | include Carotenoids and Xanthophylls but not Chlorophyll b. |
II: | enable a wider range of wavelength of incoming light to be utilised for photosynthesis. |
III: | protect Chlorophyll a from photo-oxidation. |
What is true regarding PSI and PSII?
1. PS I works before PS II during the light reaction
2. A single chlorophyll a molecule makes the reaction center in both PS I and PS II
3. The reaction center of PS I is P680 and in PS II is P700
4. LHC is seen in PS I but not in PS II
The electrons needed to replace those removed from PS I are provided by:
1. | The LHC | 2. | Water |
3. | NADPH | 4. | PS II |