Question

Outline the function of the following components of the nucleus.                /6 marks

a) nuclear basket

b) nucleoplasm

c) nuclear pore

d) nucleolus

e) nuclear lamina

f) nucleoporins

Answer 1

A) Nuclear basket- The nucleoplasmic filaments are organized in a basket-like structure that projects from the NPC towards the nuclear interior called “Nuclear Basket".It helps in transport and chromatin regulation.

B) Nucleoplasm- It is a type of suspension medium present inside the nucleus and enclosed by the nuclear membrane. It contains nucleolus and chromosome.

C) Nuclear pore- They are protein-based channels present on the nuclear envelope which allows the passage of molecules from the nucleus to the cytoplasm and vice versa.

D) Nucleolus- It helps in the formation of ribosomal subunit for protein and ribosomal RNA (rRna)

E) Nuclear Lamina- It is a dense network in the nucleus of the cell and made up of membrane-associated protein and intermediate filament. It provides mechanical support and regulates important cellular events.

F)Nucleoporins- They play important role in transport of mRNA from the nucleus to cytoplasm after transcription of DNA.