Cell Review - Nucleus

Question 1

Nucleus

Answer 1

General Location/Appearance:
- membrane-bound central body with pores in its membrane

Function:
- Command center of the cell containing DNA instructions

Question 2

Nucleolus

Answer 2

• dark coloured body inside the nucleus

Function:
- produces ribosomes which in turn synthesize proteins from RNA

Question 3

Chromatin

Answer 3

• A complex of DNA and proteins in the nucleus

Function:
- RNA instructions are produced from the DNA in the chromatin

Question 4

Nuclear Membrane

Answer 4

• double membrane surrounding the nucleus
• has pores

Function:
- releases messenger RNA produced from the DNA and used by the ribosomes to produce proteins

Note:
- RNA is able to be released through these pores

Question 5

What is the chemical composition of a nucleosome?

Answer 5

DNA and proteins (Histones)

Question 6

What is the function of the nucleosome components named above?

Answer 6

• DNA contains the genetic code to build RNA, and ultimately proteins
• histones keep the DNA wound in an organized fashion