Structure of prokaryotic cells and of viruses

Question 1

Prokaryotic cells have:

Answer 1

• cytoplasm that lacks membrane bound organelles
• smaller ribosomes
• no nucleus just single strand DNA
• cell wall that contains muriein, a glycoprotein

Question 2

They also have:

Answer 2

1 or more plasmids
capsule surrounding cell
1 or more flagella

Question 3

Viruses

Answer 3

acellular and non-living

Question 4

Structure of viruses

Answer 4

• contain nucleic acids but can only replicate inside host cell
• They are enclosed in a protein coat called the CAPSID
• Some viruses, like the HIV virus are surrounded by a lipid envelope. These have attachment proteins which are essential to allow the virus to identify and attach to a host cell