Section A - Organisms and Life Processes

Question 0

Bacteria

Answer 0

Can be many different shapes
Complex protein wall and small loop of DNA in cytoplasm.
Extra bits of DNA called plasmids
Lactobacillus is an example

Question 1

Protocists

Answer 1

Normally single-celled
Some cause disease - Plasmodium causes malaria

Example - Algae

Question 2

Prokaryotes

Answer 2

Unicellular
No nucleus
Most are bacteria but also include the archaea

Question 3

Viruses

Answer 3

Parasitic
Core of genetic RNA or DNA surrounded by a protein coat
All natural viruses cause disease
HIV/AIDS is an example