Roles of structures found in bacteria cell

Question 1

cell wall

Answer 1

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

Question 2

Capsule

Answer 2

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

Question 3

Cell-surface membrane

Answer 3

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

Question 4

Circular DNA

Answer 4

Possess the genetic information for the replication of bacterial cells

Question 5

Plasmids

Answer 5

Possesses genes that may aid the survival of bacteria in adverse conditions, e.g. produces enzymes enzymes that break down antibiotics