Nucleus

Question 1

Nucleus as whole

Answer 1

Contains organisms hereditary info and controls cell activities
Usually 10-20 um in diameter

Question 2

Nuclear envelope

Answer 2

Double membrane that surrounds nucleus
Often has ribosomes on the surface
Controls entry and exit of materials in an out of the nucleus

Question 3

Nuclear pores

Answer 3

Allows the passage of large molecules out of the nucleus
Typically around 3000 pores in each nucleus, each 40-100 nm in diameter

Question 4

Nucleoplasm

Answer 4

Granular jelly like material that makes up the bulk of nucleus

Question 5

Chromosomes

Answer 5

Protein bound linear dna

Question 6

Nucleolus

Answer 6

Manufactures RNA and assembles ribosomes
May be more than 1 in nucleus

Question 7

Function of nucleus

Answer 7

Acts as control centre of cell through production of mRNA and tRNA and protein synthesis
Retains the genetic info in form of DNA and chromosomes
Manufactures RNA and ribosomes