Bacteria

Question 1

Types of bacteria

Answer 1

Spherical (coccus)
Spiral (spirillum)
Rod (Bacillus)

Question 2

Structure of bacteria

Answer 2

All have cell wall, cell membrane, nucleoid, ribosome, cytoplasms plasm

Some have Capsule and a tail called a flagella, and a plasmid

Question 3

Binary fission

Answer 3

Dna replication and plasmid replication, moving the replicated structure to either the end of the cell, cell wall and cell membrane pinching inward, and finally cell division

Question 4

Endospore

Answer 4

thick and tough walled cell formed in unsuitable conditions

Formed under harsh conditions so the cell could survive

Question 5

Endospore formation

Answer 5

Nutrients run out
Asymmetrical binary fission occurs 
smaller cell engulfed by larger cell
engulfed cell forms a tough wall
tough, walled cell is released to become an endospore

Question 6

Nutrition

Answer 6

Autotrophic - Bacteria produce own food
Chemosynthesis
Photosynthesis

Heterotrophic - Bacteria obtain food from other living organisms
Saprophytic
Parasitic

Question 7

factors affecting growth of bacteria

Answer 7

Ph
Temperature
Oxygen concentration

Question 8

Growth curve of microorganisms

Answer 8

Lag phase - Bacteria adjusting to conditions

Log phase - Bacteria multiply

Stationary phase - Nutrients begin to run out, rate of bacteria growth = rate of bacteria death

Decline phase - Rate of death higher due to lack of nutrients

Survival phase - only some bacteria survive as endospores