Cells

Question 1

Describe the structure and function of a nucleus

Answer 1

• The nucleus contains a nucleolus enclose in a nuclear envelope with nuclear pores .The nuclear envelope also contains chromatin
• The function of the nucleus is to control the cells activities .It contains the DNA instructions to make a protein .The pores allow substances to move between the nucleus and the cytoplasm .The nucleolus makes ribosomes

Question 2

What is the function of lysosomes ?

Answer 2

lysosomes contain digestive enzymes that’s are kept separate from the cytoplasm and is used to break down worn out complements in cells

Question 3

whats is the function of the SER?

Answer 3

to synthesise and process lipids

Question 4

what are :

• plasmids
• flagellum
• pili ?

Answer 4

Plasmids -small loops of DNA that aren’t part of the main DNA molecule
Flagellum -long hair like structure that rotates to make the prokaryotic cell move
Pili-pili helps prokaryotes stick together and can be used to transfer genetic material