Question

(a) List various components of the nucleus.
(b) What are chromosomes ? Give their chemical compositon.
(c) List the type of chromosome if it has the following position of centromere.
(i) in the middle. (ii) at the tip of chromosome.

Answer 1

(a) Nuclear envelope, nuclear sap, chromatin material, nucleolus and nuclear matrix.
(b) Chromosomes are thread-like structures usually present in the nucleus and become visible only during cell divison. Each chromosome is made up of DNA and Proteins.
(c) (i) Metacentric chromosome (ii) Telocentric chromosome.