Q. No.The following processes occur during photosynthesis
(i) Reduction of carbon dioxide
(ii) The splitting of water
(iii) The synthesis of glucose
(iv) Release of oxygen
(v) Formation of ATP
Which one of the following combinations is correct for the light phase ?
1. i, ii and iii
2. iii, iv and v
3. i, iii and iv
4. ii, iv and v
The first step for initiation of photosynthesis will be:
| 1. | Photolysis of water |
| 2. | Excitement of chlorophyll molecule due to absorption of light |
| 3. | ATP formation |
| 4. | Glucose formation |
Select the incorrect statement.
| 1. | Carotenoids protect the plant from excessive heat and prevent photo-oxidation of chlorophyll pigments |
| 2. | All pigments other than chlorophyll a are called accessory pigments |
| 3. | The electrons removed from PS II are never replaced |
| 4. | Cyclic photophosphorylation occurs mostly in stroma lamellae membrane |
| A. | Oxygen release | B. | Formation of NADPH |
| C. | Use of ATP | D. | Water splitting |
| E. | Carboxylation | ||
| 1. | C and E only | 2. | A, B and D only |
| 3. | B, C and E only | 4. | A, B, C and D only |
In a chloroplast the highest number of protons are found in
1. lumen of thylakoids
2. inter membrane space
3. antenna complex
4. Stroma
Which is not true regarding cyclic electron transfer system (ETS) in thylakoid membrane of higher plants?
| 1. | Operates at low light intensity |
| 2. | Only PS I is involved |
| 3. | Acts as a back up for ATP synthesis |
| 4. | External electron donor is required |
Which of the following statements is incorrect?
| 1. | Grana lamellae have both PS I and PS II. |
| 2. | Cyclic photophosphorylation involves both PS I and PS II. |
| 3. | Both ATP and NADPH + H+ are synthesized during non-cyclic photophosphorylation. |
| 4. | Stroma lamellae have PS I only and lack NADP reductase. |
| 1. | Grana lamellae have both PS I and PS II |
| 2. | Cyclic photophosphorylation involved both PS I and PS II |
| 3. | Both ATP and NADPH + H+ are synthesised during non-cyclic photophosphorylation |
| 4. | Stroma lamellae lack PS II and NADP reductase |
| A. | \(\mathrm {CO}_2\) | B. | \(\mathrm {O}_2\) |
| C. | \(\mathrm {H_2O}\) | D. | Chlorophyll |
| E. | Light | ||
2. C, D and E only
3. A and B only
4. A, C and E only
PGA as the first CO2 fixation was discovered in the photosynthesis of
| 1. | bryophyte | 2. | gymnosperm |
| 3. | angiosperm | 4. | algae |
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