Structure of Chloroplasts

Q. Mitochondria and chloroplast are
(i) semi-autonomous organelles
(ii) formed by division of pre-existing organelles and they contain DNA but lack protein-synthesizing machinery

Which of the following statements are correct?

1. Statement (i) is true but (ii) is false
2. Statement (ii) is true but (i) is false
3. Both statements are true
4. Both statements are false

Q. Label the parts of the chloroplast.

1. Grana
2. Thylakoids
3. Stroma
4. Outer membrane

Q.

The carbohydrates on the extracellular membrane forms

1. Sugar chains

2. Glycocalyx

3. Peptidoglycan

4. Glucose chain

Q. Which of the following is correct:
(a) Cells of all living organisms have a nucleus.
(b) Both animal and plant cells have a well defined cell wall.
(c) In prokaryotes, there are no membrane bound organelles.
(d) Cells are formed de novo from abiotic materials.

Q.

Choose the site for protein production (translation) in the cell

1. Endoplasmic reticulum

2. Mitochondria

3. Ribosomes

4. Chloroplast

Q.

A sectional view of the chloroplast is given below. Choose the correct statement for A and B?

1. A - Envelope of chloroplast possess fully permeable membrane;
   B - DNA
2. A - Thylakoids arearranged in stacks like the piles of coins called grana;
   B - Possess the enzyme required for protein and carbohydrate synthesis
3. A - The DNA of the chloroplast are single standard circular DNA
   B - Matrix
4. A - structure is arranged is stacks like the piles of coins called stroma.
   B - DNA

Q. Which one of the following four structures is correctly matched with the accompanying description?

1. Plasma membrane – Outer layer of cellulose or chitin is absent
2. Mitochondria – Bacteria like elements with inner membrane forming sacs containing chlorophyll, found in plant cell and algae.
3. Chloroplasts – Bacteria like elements with inner membrane highly folded
4. Golgi apparatus – Stacks of flattened vesicles

Q.

Why does Rubisco act only as a carboxylase in C4 plants?

Q. Match the following: