Prokaryotic Cells and Viruses - 3.6

Question 1

Do prokaryotic cells contain a nucleus?

Answer 1

No they contain circular DNA that floats freely in the cytoplasm

Question 2

What other structures are found in prokaryotic cells?

Answer 2

• flagellum• plasma membrane • cell wall• plasmids • ribosomes• Genetic material (DNA)• mesosome • capsule

Question 3

What is a plasmid?

Answer 3

Rings of DNA floating freely in the cytoplasm

Question 4

How does the cell wall differ from a eukaryotic cell?

Answer 4

It is not made of cellulose or chitin

Question 5

How does flagella in prokaryotic cells differ from eukaryotic?

Answer 5

It is made of the protein flagellum and us arranged in a helix

Question 6

How do the ribosomes differ?

Answer 6

They are a lot smaller (70s)

Question 7

Give an example of a prokaryotic cell:

Answer 7

Bacteria cell such as cholera

Question 8

Can normal microscopes be used to see the internal structure of prokaryotic cells?

Answer 8

NoAn electron microscope is necessary

Question 9

What is a mesosome?

Answer 9

The site of respiration

Question 10

What is a capsule?

Answer 10

A protective device (slime layer)

Question 11

How big are prokaryotic cells?

Answer 11

Extremely small cells ( less than 2 micrometers in diameter)