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Q. No.

Where does oxygen come from during photosynthesis?
1. Oxidation of water
2. Oxidation of glucose
3. Reduction of glucose
4. From CO2

Subtopic:  Light Reaction: Photophosphorylation |
 90%
Level 1: 80%+
Hints

The correct equation, representing the overall process of photosynthesis is –

1. 6CO2 + 6H2O → C6H12O6 + 6H2O + 6O2
2. 6CO2 + 6H2O → C6H12O6 + 6O2
3. 6CO2 + 12H2O → C6H12O6 + 6O2 + 6H2O
4. 6CO2 + 12H2O → C6H12O6 + 6O2 + H2O


 

Subtopic:  Photosystems |
 78%
Level 2: 60%+
Hints

Which of the following statement is incorrect?

1. Oxygen is released from water.
2. Photosynthesis is a single step reaction.
3. Action spectrum of photosynthesis resembles roughly the absorption spectra of chlorophyll a and b.
4. In plants glucose is stored as starch.


 

Subtopic:  Photosystems |
 89%
Level 1: 80%+
Hints
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The _____________ in the leaves have a large number of_________, which align themselves along the walls of the ____________, such that they get the __________quantity of the incident light.

1. chloroplasts, chlorophyll, chloroplasts, optimum.
2. mesophyll cells, chlorophyll, mesophyll cells, optimum.
3. mesophyll cells, chloroplasts, mesophyll cells, optimum.
4. mesophyll cells, chloroplasts, mesophyll cells, minimum.


 

Subtopic:  Photosystems |
 82%
Level 1: 80%+
Hints

Identify i, ii, iii and iv labellings in the following diagram :

i ii iii iv
1. stroma lamella thylakoid stroma genetic material
2. stroma lamella grana stroma starch granule
3. grana lamella stroma starch granule
4. stroma lamella grana cytoplasm starch granule
Subtopic:  Photosystems |
 81%
Level 1: 80%+
Hints
Column I Column II
i. grana a. dark reaction
ii. Stroma b. light reaction
c. synthesis of ATP and NADPH+H+
d. synthesis of sugar
 
1. i-b, c;  ii-a, d.
2. i-a, d;  ii-b, c.
3. i-b, d; ii-a,c.
4. i-b;  ii-a, c, d.

Subtopic:  Photosystems |
 78%
Level 2: 60%+
Hints
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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

Absorption spectrum of chlorophyll- ‘a’ is shown by-


1. I
2. II
3. III
4. Not shown.

Subtopic:  Photosynthetic Pigments |
 73%
Level 2: 60%+
Hints

How many pigments are responsible for the color of a plant leaf?

1. 1 2. 2
3. 3 4. 4
Subtopic:  Pigments |
 79%
Level 2: 60%+
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Range of wavelength at which chlorophyll-a shows the maximum absorption in blue region:

1. 400-450 nm 2. 450-500 nm
3. 650-700 nm 4. 500-600 nm.
Subtopic:  Pigments |
Level 3: 35%-60%
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