Question

The pigment molecules of chloroplast are located-
A. Within its thylakoid membranes
B. Within the space between outer and inner membranes
C. Within its inner membrane
D. On the outer membrane

Answer 1

Hint: The chloroplast is the cell organelle which contains the green pigment known as chlorophyll. This green pigment is necessary for the process of photosynthesis. The process of formation of food in plants by utilising carbon dioxide, water and sunlight is known as photosynthesis.

Complete Answer:
The process of formation of food in green plants is known as photosynthesis. The green pigment necessary for this process is present in chloroplast. There are three types of plastids. These plastids are double membrane structures which play an important role in production of food.

The three types of plastids are- Chloroplast, chromoplast and leucoplasts.
Chloroplasts are the green pigment containing cell organelles which help in the process of photosynthesis. This cell organelle is exclusively present in some green plants and algae. Some of the unique characters of chloroplasts include presence of DNA, and independent reproduction.

Structure of chloroplast: The various parts of chloroplast include-
- Inner and outer membrane
- Intermembrane space
- Thylakoid membrane
- Stroma
- Lamellae

The chloroplast is oval or biconcave in shape and is present in the mesophyll of the plant cells. The size of chloroplast varies between 4-6 micrometers in diameters. There are two membranes which represent outer and inner membranes of the chloroplast. The space between two membranes represents the intermembrane space. The space inside the inner membrane is known as stroma. It contains sac-like structures known as thylakoids. The membranes of thylakoids contain the green pigment chlorophyll. Stacks of thylakoids are called grana or granum.

So, the correct answer is option (A).

Additional information: The various functions of chloroplast include-
- Performing the process of photosynthesis.
- Absorption and conversion of light energy to chemical.
- Production of oxygen.
- Produces energy in the form of ATP.

Note: Chlorophyll is the green pigment which is present in the cell organelle chloroplast. Chloroplast is the green coloured plastid which helps in the process of photosynthesis. The parts of chloroplast include- stroma, thylakoids, lamellae and the double membranes. The thylakoid membrane contains the chlorophyll pigment.