3.6 Prokaryotic cells

Question 1

Bacteria: What is the role of the cell wall?

Answer 1

Physical barrier that excludes certain substances and protects against mechanical damage and osmotic lysis

Question 2

Bacteria: What is the role of the capsule?

Answer 2

Protects bacterium from other cells and helps groups of bacteria to stick together for further protection

Question 3

Bacteria: What is the role of the cell-surface membrane?

Answer 3

Acts as a differentially permeable layer, which controls the entry and exit of chemicals

Question 4

Bacteria: What is the role of the circular DNA?

Answer 4

Possesses the genetic information for the replication of bacterial cells