Question

Give functions.
A. Plasma membrane
B. Cytoplasm
C. Lysosome
D. Vacuole
E. Nucleus

Answer 1

a. Functions of the plasma membrane:

• It gives shape and support to the cell.
• It acts as a mechanical barrier to protect the internal contents of the cell.
• It separates the contents of the cell from its surrounding medium.
• It performs physical activities such as diffusion and osmosis.

b. Functions of cytoplasm:

• It is the medium for all cellular chemical reactions.
• It is a medium in which the organelles remain suspended.
• It helps in the movement of the different cellular elements.

c. Functions of lysosomes:

• Lysosomes destroy foreign materials that enter the cell.
• Dead and worn-out organelles are removed by lysosomes.
• Cells are autolysed by lysosomes, and their contents are released within the cell.

d. Functions of vacuoles:

• The main function of vacuoles is to store food in a cell.
• They also help in storing and expelling wastes and toxic by products of metabolic reactions.
• They help in maintaining the turgidity and rigidity of a cell.

e. Functions of nucleus:

• It is the control centre of a cell as it controls all the activities of the cell.
• It also contains gene-containing chromosomes which are the units of inheritance in an organism.