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Q. No.How many of the following statements are correct?
| i. | Products of dark reaction are substrates of light reaction. |
| ii. | Products of light reaction are substrates of dark reaction. |
| iii. | In the stroma, enzymatic reactions incorporate CO2 into the plant leading to the synthesis of sugar. |
| iv. | Dark reactions are directly light-driven. |
| v. | Chloroplast is a single membranous organelle. |
1. 2
2. 3
3. 4
4. 1
Subtopic: Dark Reaction: Biosynthetic Phase | Light Reactions :1 | Light Reactions |
66%
Level 2: 60%+
Hints
Choose the correct match of pigments and their colour.
| (i) | Chlorophyll a | Bright green |
| (ii) | Chlorophyll b | Blue-green |
| (iii) | Xanthophyll | Yellow-green |
| (iv) | Carotenoids | Orange green |
1. (i)
2. (i) & (ii)
3. (i), (ii) & (iii)
4. (i), (ii), (iii) & (iv)
Subtopic: Photosynthetic Pigments |
Level 3: 35%-60%
Hints
| Column – I | Column - II | ||
| i. | Jan Ingenhousz | a. | discovery of O2 |
| ii. | Joseph Priestley | b. | Plants restore to the air whatever breathing animals and burning candles remove |
| iii. | T.W Englemann | 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. | Using a prism he split light into its spectral components and then illuminated Cladophora, placed in a suspension of aerobic bacteria. |
Which of the following shows the correct match?
| 1. | i-c; ii-b; iii-a, e, f; iv-d |
| 2. | i-a, b; ii-c; iii-d; iv- e, f. |
| 3. | i-a; ii- b; iii- c, e; iv-f. |
| 4. | i-c, ii-a,b; iii-e, f; iv-d; |
Subtopic: Historical View: Experiments |
83%
Level 1: 80%+
Hints
Read the following statements with respect to antenna molecules.
a The LHC are made up of hundreds of pigment molecules bound to proteins.
b Water splitting complex is associated with the PS-ll.
1. Only b is correct
2. Both a & b are incorrect
3. Only a is correct
4. Both a & b are correct
Subtopic: Photosystems |
85%
Level 1: 80%+
Hints
Read the following four statements A,B,C and D. Select the right option
A. Z scheme of light reaction takes place in the presence of PS I only
B. only PS I is functional in cyclic photophosphorylation
C. cyclic photophosphorylation results into synthesis of ATP and NADPH2
D. stroma lamellae lack PS II as well as NADP
1. A and B
2. B and C
3. C and D
4. B and D
Subtopic: Light Reactions |
88%
Level 1: 80%+
Hints
Consider the given two statements:
| I: | The oxygenation reaction of RuBisCO is a wasteful process. |
| II: | 3-phosphoglycerate is not created. |
| 1. | Both I and II are correct and II explains I |
| 2. | I is correct but II is incorrect |
| 3. | Both I and II are correct but II does not explain I |
| 4. | I is incorrect but II is correct |
Subtopic: Photorespiration |
Level 3: 35%-60%
Please attempt this question first.
Hints
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Match each item in Column-I with the one in Column-II regarding C4 plants and select the correct match from the codes given:
Codes:
| Column-I | Column-II | ||
| A. | Primary acceptor of carbon dioxide | P. | RuBP |
| B. | Cells in which Calvin cycle takes place | Q. | PEP |
| C. | Primary carbon dioxide fixation product | R. | Bundle sheath |
| D. | Example | S. | Mesophyll |
| T. | PGA | ||
| U. | OAA | ||
| V. | Sorghum | ||
| W. | Wheat |
| A | B | C | D | |
| 1. | Q | S | U | V |
| 2. | P | S | T | W |
| 3. | Q | R | U | V |
| 4. | P | R | T | W |
Subtopic: C4 Cycle (Hatch & Slack Pathway) | C4 Plants Examples |
74%
Level 2: 60%+
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Hints
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Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R):
In the light of the above statements choose the correct answer from the options given below:
| Assertion (A): | Cyclic photophosphorylation results in the synthesis of ATP but not of NADPH + H+. |
| Reason (R): | The excited electron does not pass on to NADP+ but is cycled back to the PS I complex through the electron transport chain. |
| 1. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
| 3. | (A) is True but (R) is False. |
| 4. | Both (A) and (R) are False. |
Subtopic: Light Reaction: Photophosphorylation |
83%
Level 1: 80%+
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Hints
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Given below are two statements:
| Assertion (A): | The reaction centres in both photosystems in plants is the same. |
| Reason (R): | The reaction centres of both photosystems are formed by chlorophyll b molecules. |
| 1. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are true but (R) is not the correct explanation of (A). |
| 3. | (A) is true but (R) is false. |
| 4. | Both (A) and (R) are false. |
Subtopic: Light Reactions :1 |
63%
Level 2: 60%+
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Consider the two statements:
| I: | The water-splitting complex is located on the inner side of the thylakoid membrane |
| II: | The NADP reductase enzyme is located on the stromal side of the thylakoid membrane |
| 1. | Only I is correct |
| 2. | Only II is correct |
| 3. | Both I and II are correct |
| 4. | Both I and II are incorrect |
Subtopic: Dark Reaction: Biosynthetic Phase |
80%
Level 1: 80%+
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