Question

Choose the correct answer from each of the four options given below:

The individual flattened stacks of membranous structures inside the chloroplasts are known as:

• A. Grana
• B. Stroma
• C. Thylakoids
• D. Cristae

Answer 1

The correct option is C

Thylakoids

Chloroplast:

1. Chloroplasts are special cell organelles that contain chlorophyll (A green pigment).
2. This pigment (chlorophyll) helps in photosynthesis.
3. Chlorophyll is present inside the thylakoids of the chloroplast.
4. Thylakoid is a sac-like structure present inside the chloroplast.
5. Thylakoids are arranged in a stack to form grana.
6. The matrix chloroplast is known as the stroma.
7. A light phase of photosynthesis occurs inside the thylakoids and the dark phase occurs in the stroma of the chloroplast.

Figure: Structure of chloroplast

Cristae:

1. The finger-like structure can be found in mitochondria (one kind of cell organelle).
2. Inner membrane fold to form cristae.

Figure: Mitochondria

Hence, the correct option is C thylakoids.