Select Chapter Topics:
Q. No.Subtopic: Introduction |
95%
Level 1: 80%+
Please attempt this question first.
Hints
Identify the correct equation of photosynthesis amongst the following:
| 1. | \(\small6 \mathrm{CO}_2+12 \mathrm{H}_2 \mathrm{O}+\text { light } \cdots-\mathrm{C}_6 \mathrm{H}_{12} \mathrm{O}_6+6 \mathrm{O}_2+6 \mathrm{H}_2 \mathrm{O}\) |
| 2. | \(\small6 \mathrm{CO}_2+12 \mathrm{NH}_3+\text { light }-\cdots-\mathrm{C}_6 \mathrm{H}_{12} \mathrm{O}_6+6 \mathrm{H}_2 \mathrm{~N}_2+6 \mathrm{H}_2 \mathrm{O}\) |
| 3. | \(\small\mathrm{C}_6 \mathrm{H}_{12} \mathrm{O}_6+6 \mathrm{O}_2+6 \mathrm{H}_2 \mathrm{O}+\text { light }-\cdots-6 \mathrm{CO}_2+12 \mathrm{H}_2 \mathrm{O}\) |
| 4. | \(\small3 \mathrm{CO}_2+6 \mathrm{H}_2 \mathrm{O}+\text { light } \cdots-\mathrm{C}_3 \mathrm{H}_6 \mathrm{O}_3+3 \mathrm{O}_2+3 \mathrm{H}_2 \mathrm{O}\) |
Subtopic: Introduction |
93%
Level 1: 80%+
Please attempt this question first.
Hints
Which of the following statements do not justify the importance of photosynthesis?
| 1. | it is the primary source of all food on earth. |
| 2. | it is responsible for the release of oxygen into the atmosphere. |
| 3. | it is responsible for the water balance on earth. |
| 4. | use of energy from sunlight by plants doing photosynthesis is the basis of life on earth. |
Subtopic: Introduction |
88%
Level 1: 80%+
Hints
In Englemann’s experiment with Cladophora, bacteria accumulated near which regions of the spectrum, proving the role of these wavelengths in photosynthesis?
| 1. | Orange and Violet |
| 2. | Green and Yellow |
| 3. | Infrared and Ultraviolet |
| 4. | Red and Blue |
Subtopic: Historical View: Experiments |
98%
Level 1: 80%+
Please attempt this question first.
Hints
Please attempt this question first.
Match the experiment with its contribution:
Codes:
1. A-2, B-4, C-3, D-1
2. A-1, B-2, C-4, D-3
3. A-2, B-1, C-3, D-4
4. A-3, B-1, C-2, D-4
| List-I (Scientist) | List-II (Contribution) | ||
| A. | Joseph Priestley | 1. | Light is essential for photosynthesis |
| B. | Jan Ingenhousz | 2. | Role of \(O_2\)in burning a candle |
| C. | Julius von sachs | 3. | Starch as product of photosynthesis |
| D. | T.W. Engelmann | 4. | Action spectrum |
1. A-2, B-4, C-3, D-1
2. A-1, B-2, C-4, D-3
3. A-2, B-1, C-3, D-4
4. A-3, B-1, C-2, D-4
Subtopic: Historical View: Experiments |
94%
Level 1: 80%+
Please attempt this question first.
Hints
Please attempt this question first.
Consider the given two statements:
Options:
| Assertion (A): | In the experiment where part of a leaf is enclosed in a KOH-soaked tube and the other half is exposed to air, the KOH-treated portion tests negative for starch, while the exposed part tests positive. |
| Reason (R): | KOH absorbs CO₂, preventing photosynthesis in the enclosed portion, thereby proving that CO₂ is essential for starch formation. |
| 1. | Both (A) and (R) are True and (R) correctly explains (A). |
| 2. | (A) is True but (R) is False. |
| 3. | (A) is False but (R) is True. |
| 4. | Both (A) and (R) are False. |
Subtopic: Historical View: Experiments |
91%
Level 1: 80%+
Please attempt this question first.
Hints
Please attempt this question first.
What was the contribution of Julius von Sachs to plant physiology?
| 1. | He discovered that plants absorb nitrogen from the air to synthesize glucose. |
| 2. | He identified mitochondria as the site of photosynthesis in plant cells. |
| 3. | He demonstrated that all plant cells, irrespective of color, can perform photosynthesis. |
| 4. | He provided evidence that plants produce glucose and store it as starch. |
Subtopic: Historical View: Experiments |
91%
Level 1: 80%+
Please attempt this question first.
Hints
Please attempt this question first.
T.W. Engelmann:
| 1. | described a first action spectrum of photosynthesis |
| 2. | provided evidence for production of glucose when plants grow |
| 3. | showed that it is only the green parts of the plant that can release oxygen |
| 4. | first showed that oxygen evolved by the green plant comes from water, not from carbon dioxide |
Subtopic: Historical View: Experiments |
91%
Level 1: 80%+
Please attempt this question first.
Hints
Please attempt this question first.
What was the significance of Jan Ingenhousz’s experiment with aquatic plants?
| 1. | It demonstrated that green parts of plants release oxygen only in the dark. |
| 2. | It proved that plants release CO2 during photosynthesis. |
| 3. | It showed that sunlight is essential for oxygen release in photosynthesis. |
| 4. | It revealed that non-green parts of plants perform photosynthesis more efficiently. |
Subtopic: Historical View: Experiments |
90%
Level 1: 80%+
Please attempt this question first.
Hints
Please attempt this question first.
Which reagent can be used to determine the essentiality of CO2 for the process of photosynthesis.
1. KOH
2. K2Cr2O7
3. Starch
4. Iodine tincture
1. KOH
2. K2Cr2O7
3. Starch
4. Iodine tincture
Subtopic: Historical View: Experiments |
90%
Level 1: 80%+
Please attempt this question first.
Hints
Please attempt this question first.
Select Chapter Topics:
© 2026 GoodEd Technologies Pvt. Ltd.