Q. No.Photosynthesis is a-
a. Biochemical process
b. Physical process
c. Chemical process
d. Physico-chemical process
a. Biochemical process
b. Physical process
c. Chemical process
d. Physico-chemical process
Which of the following statements does 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. |
The half-leaf experiment, where a part of the leaf is enclosed in a test tube containing some KOH soaked cotton was performed, which showed that _________ was required for photosynthesis?
a. Light
b. Chlorophyll
c. CO2
d. O2
Match the scientists in Column I with their contributions in Column II:
| Column I (Scientist) | Column II (Contribution) |
|---|---|
| i. Jan Ingenhousz | a. Discovery of oxygen (O₂) |
| ii. Joseph Priestley | b. Plants restore to the air whatever breathing animals and burning candles remove |
| iii. T.W. Engelmann | 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. Used a prism to split light into its spectral components and then illuminated Cladophora placed in a suspension of aerobic bacteria |
Choose the option with the correct matching:
a. i → c; ii → b; iii → a, e, f; iv → d
b. i → a, b; ii → c; iii → d; iv → e, f
c. i → a; ii → b; iii → c, e; iv → f
d. i → c; ii → a, b; iii → e, f; iv → d
Cornelius van Niel, who, based on his studies demonstrated that photosynthesis is essentially a light-dependent reaction performed his experiments on-
1. Cladophora
2. purple and green bacteria
3. green algae
4. Non sulphur bacteria
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. |
Where does photosynthesis takes place?
| 1. | in green leaves |
| 2. | in green parts of plant |
| 3. | in leaves |
| 4. | in complete plant |
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. |
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 |
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