Question

7. Describe the functions of the following.
(i) Cell wall
(ii) Cell membrane
(iii) Nucleus
(iv) Endoplasmic reticulum
(v) Ribosomes
(vi) Lysosomes​

Answer 1

Answer:

cell wall:-

The cell wall surrounds the plasma membrane of plant cells and provides tensile strength and protection against mechanical and osmotic stress.

cell membrane:-

The plasma membrane, or the cell membrane, provides protection for a cell. It also provides a fixed environment inside the cell

nucleus:-

The nucleus controls and regulates the activities of the cell and carries the genes, structures that contain the hereditary information.

Endoplasmic reticulum:-

The endoplasmic reticulum (ER) is a large, dynamic structure that serves many roles in the cell including calcium storage, protein synthesis and lipid metabolism.

ribosome:-

Ribosomes have two main functions — decoding the message and the formation of peptide bonds. These two activities reside in two large ribonucleoprotein particles of unequal size, the ribosomal subunits. Each subunit is made of one or more ribosomal RNAs and many ribosomal proteins.

lysosome:-

A lysosome is a membrane-bound cell organelle that contains digestive enzymes. Lysosomes are involved with various cell processes. They break down excess or worn-out cell parts. They may be used to destroy invading viruses and bacteria