Mitosis, Meosis And Binary Fission

Question 1

What are new cells used for?

Answer 1

Growth
Development
Repair

Question 2

Outline the three stages of the cell cycle?

Answer 2

Growth
DNA replication and mitosis
Division

Question 3

What happens in stage 1 of the cell cycle?

Answer 3

The number of sub-cellular structures increases

Question 4

What happens in stage two of the cell cycle?

Answer 4

The chromosomes duplicate and they line up in the centre of the cell, where they are pulled to each pole.

Question 5

What happens in stage three of the cell cycle?

Answer 5

Division involves the cell membrane and cytoplasm to pull apart to create two identical cells

Question 6

Outline the difference between mitosis and meiosis.

Answer 6

Mitosis creates two identical cells
Meiosis produces four different gamete cells

Question 7

What is binary fission?

Answer 7

The process in which prokaryotic organisms divide and reproduce

Question 8

What are the three stages In binary fission?

Answer 8

Grow
DNA replication
Division

Question 9

What is the difference between binary fission and mitosis?

Answer 9

In Binary fission when the plasmids replicate they do not separate to the poles so each daughter cell has a random amount

Question 10

What factors effect the rest of bacterial growth?

Answer 10

Temperature
Moisture
Oxygen
Nutrient availability

Question 11

What are the two mediums in which you can grow bacteria in a lab?

Answer 11

Nutrient broth
Agar jelly

Question 12

Outline 5 aseptic techniques when growing bacteria?

Answer 12

Clean surfaces - clean area before and after with alcohol
Was hands - soap and warm water
Sterilising instruments - heating to temp where they are all destroyed
Sterile field - area created by updraft of flame
Maximum 25 degrees - prevents pathogens growing which prefer 37