The Chloroplast

Q. In leaves, the chloroplasts align themselves along the walls of the mesophyll cells

1. to prevent sunlight from falling on the chloroplast
2. none of the above
3. to provide optimum sunlight for photosynthesis
4. to facilitate the dark reaction

Q.

Do chloroplasts have DNA?

Q. Choose the correct statement(s) from the following about chlorophyll :
I. Four pyrrole rings are attached to Mg by their C atoms
II. Cyclopentanone ring is attached to the tetra-isoprenoid alcohol chain.
III. Chlorophyll appears green due to absorption of red and blue light.
IV. Excitation of chlorophyll by light is a photochemical reaction

1. I, II, III
2. I, II, IV
3. III, IV
4. II, III, IV

Q. Grana refers to

1. Stacks of thylakoids in plastids of higher plants
2. A constant in quantum equation
3. Glycolysis of glucose
4. By – product of photosynthesis

Q. Thylakoid is

1. the aqueous fluid enclosed by the inner membrane of the chloroplast
2. the site for the dark reaction of photosynthesis
3. a flattened disc-like sac in chloroplast
4. the site of protein synthesis in chloroplasts

Q. Which of the following is not a constituent of chloroplast?

1. Stroma lamellae
2. Cristae
3. Stroma
4. Ribosomes

Q. Assertion: The stromal thylakoids are rich in both PS I and PS II.
Reason: The granal membranes are rich in ATP synthetase.

1. Both the assertion and reason are false.
2. Both reason and assertion are true and the reason is the correct explanation for the assertion.
3. Both the reason and assertion are true but the reason is not the correct explanation of the assertion.
4. Assertion is true but the reason is false.

Q.

Assertion (A): Chloroplasts are present in all plant cells.

Reason (R): Chloroplasts are present in cells present in the parts that are exposed to sunlight.

1. Both A and R are correct and R explains A
2. Both A and R are correct and R does not explain A
3. A is incorrect but R is correct
4. Both A and R are incorrect

Q. Which of the following organelles is bound by a double membrane system?

1. Golgi apparatus
2. Central vacuole
3. Chloroplast
4. Ribosome

Q. Green pigment (chlorophyll) is present in

1. chromoplast
2. chloroplast
3. ribosome
4. lysosome

Q.

Assertion (A): Chloroplasts are present in all plant cells.

Reason (R): Chloroplasts are present in cells present in the parts that are exposed to sunlight.

1. Both A and R are correct and R explains A
2. Both A and R are correct and R does not explain A
3. A is incorrect but R is correct
4. Both A and R are incorrect

Q. Which of the following is not a constituent of chloroplast?

1. Stroma lamellae
2. Ribosomes
3. Stroma
4. Cristae

Q. Choose the correct statement(s) from the following about chlorophyll :
I. Four pyrrole rings are attached to Mg by their C atoms
II. Cyclopentanone ring is attached to the tetra-isoprenoid alcohol chain.
III. Chlorophyll appears green due to absorption of red and blue light.
IV. Excitation of chlorophyll by light is a photochemical reaction

1. I, II, III
2. III, IV
3. I, II, IV
4. II, III, IV

Q. Photosynthetic pigments are located in the chloroplast in

1. Intra thylakoid space
2. Thylakoid membranes
3. Inter membrane space
4. Inner membrane of envelope.