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. |
Which of the following is not required in photosynthesis?
1. chlorophyll
2. Light
3. CO2
4. O2
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
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 |
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 | |
iv. Julius von Sachs | d. Discovery of production of glucose in plants |
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?
a. in green leaves
b. in green parts of plant
c. in leaves
d. 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 |
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. |