Structure of prokaryotic cells and viruses

Question 1

What biological molecule is the cell wall made from?

Answer 1

Murein

Question 2

How do you prokaryotic cells differ from eukaryotic cells?

Answer 2

• Prokaryotic cells cytoplasm contains no membrane, bound, organelles, e.g. mitochondria
• prokaryotic cell has no nucleus (free floating DNA)
• prokaryotic DNA is circular (linear in eukaryotic)
• prokaryotic cell wall contains murein (cellulose in eukaryotic)
• prokaryotic cells have smaller 70S ribosomes. (80S in eukaryotic)

Question 3

What are the properties of viruses?

Answer 3

• Acellular → unable to divide
• Non-living → unable to reproduce without a host cell

Question 4

What’s the protein coat around the core of a virus called?

Answer 4

Capsid