Prokaryotes and Viruses

Question 1

List 8 things that make prokaryotes different from eukaryotes

Answer 1

• Smaller ribosomes
• Flagellum
• One or more plasmids
• No nucleus, instead single circular DNA molecule
• No membrane bound DNA
• Smaller than eukaryotes
•Cell wall = murein, glycoproteins
• Cytoplasm that lacks membrane-bound organelles
• Capsule

Question 2

Structure of viruses (5)

Answer 2

• Ace cellular
• Attachment proteins
• RNA/DNA
• Capsid
• Nucleic acids surrounded by proteins

Question 3

Function of viruses (5)

Answer 3

•Invade host cells
•By binding to complimentary receptor cells
•Different attachment proteins mean different receptor cells
• Inject their own DNA/RNA
• Hijacked cell uses it’s own machinery to replicate viral particles

Question 4

How does prokaryotes reproduce

Answer 4

Binary fission

Question 5

List characteristics of Prokaryotic DNA

Answer 5

• Circular
• Not associated with proteins/histones
• Only one molecule/piece of DNA