Difference Between Ribosome And Centrosome

Difference Between Ribosome And Centrosome

Question 1. What are ribosomes? Give their functions.
Answer.

• The ribosomes are small granules made up of ribonucleic acid and ribosomal proteins.
• They are produced in the nucleolus and then migrate into the cytoplasm.
• They are attached in groups on the surface of the endoplasmic reticulum making it rough – the rough endoplasmic reticulum.
• They are also scattered singly (free ribosomes) or in groups in cytoplasm (polyribosomes).

Function Synthesis of new protein

Question 2. What is a centrosome?
Answer.

• The centrosome is a small, specialized spherical area of cytoplasm near the nucleus.
• It consists of two components: pericentriolar area and centrioles. The pericentriolar area is made up of a network of protein fibres.
• The centrioles are two rod-shaped hollow structures located in the centre of the pericentriolar area. The long axis of one centriole is at right angle to the other.
• Each centriole is a hollow cylindrical structure with its wall being made up of three groups of three microtubules (triplets) arranged in a circular fashion.

Functions

• The pericentriolar area forms the mitotic spindle during cell division.
• Centrioles take part in the formation of cilia and flagella.