Question

The granum and stroma lamellae are the parts of
A) Mitochondria
B) Chloroplast
C) Ribosomes
D) Golgi bodies

Answer 1

Hint: The grana and stroma lamellae are part of a cell organelle.

Complete Answer:
- Chloroplasts are a large organelle of plant cells. It contains a pigment that helps in photosynthesis by which plants make their food.
- The chloroplasts are double-membrane bounded organelles, which have two compartments or portions. One is granum and the other is the stroma.
- Granum Is considered as basic functional units of chloroplasts. Granum are stacks of membrane-bounded, flattened discoid sacs called thylakoids containing the molecules of chlorophyll.
- Light reactions of photosynthesis are performed in granum while dark reactions are performed in the stroma. Stroma is the homogenous matrix in which granum are remains floating. The stroma contains a variety of photosynthetic enzymes, starch grains, DNA, and ribosomes.

So, ‘chloroplast’ is the correct answer.

Additional information: Chloroplasts are organelles found in plant cells and eukaryotic algae. Chloroplasts absorb sunlight and use it in conjunction with water and carbon dioxide gas to produce food for the plant.

Note: The outer membrane covers the organelle and contains it like a skin. The inner membrane folds over many times and creates layered structures called cristae. The fluid contained in the mitochondria is called the matrix.