Question

Cytoskeleton is formed of
A. Callose deposits
B. Cellulose microfibrils
C. Calcium carbonate granules
D. Proteinaceous filaments

Answer 1

Hint: The plants have different tubules and cells having different works. Some provide rigidity or nutrients to the growing plants. These filaments of tubules are important for the movement of substances in the cell sap. This forms a complex network of fibres.

Complete answer:
The cells of eukaryotes are made of protein fibres that form the cytoskeleton. Organelles are attached to the cytoskeleton so this helps in the movement of the organelles around the cytoplasm.
These proteins have microfilaments and microtubules. Microfilaments are the actin filaments made of actin protein. Microtubule is a linear polymer of tubulin protein.

> Option A: Callose deposits: It is the defence mechanism of the plant. They are accumulated when there is a wound on the plant. They deposit on the sieve plates.

> Option B: Cellulose microfibrils: This glucose polymer controls the cell expansion. They are present in the primary walls of plant cells. They control the rigidity of the cell.

> Option C: Calcium carbonate granules: It is the component of the limestone. It is used to neutralize the acidity of the soil. It supplies calcium for plant growth.

> Option D: Proteinaceous filaments: These protein filaments form the shape of the cell called the cytoskeleton. Helping in the movement of cells in the cytoplasm.

Hence, the correct answer is option (D).

Note: Cytoskeleton is the dynamic interlinking network of proteinaceous filaments. They are round hollow small tubes made of tubulin. They provide shape to the cell. It can change its shape when required. It also enables flagella to move in the motile organisms.