Mitosis & Binary fission

Question 1

What is the cell cycle?

Answer 1

The series of steps that take place to replace dying or lost cells.

Question 2

What is mitosis used for?

Answer 2

Growth, development (of new tissues), replacement (of cells that we lose each day).

Question 3

What are the steps of the cell cycle?

Answer 3

The cell enlarges and produces more sub-cellular structures (e.g mitochondria and ribosomes)
DNA replicates and chromosomes duplicate to form two arms/copies
More cell growth
The DNA divides into two (mitosis)
The cell divides into two (cytokinesis)
Forming two daughter cells

Question 4

How many pairs of chromosomes do most humans have?

Answer 4

23

Question 5

What is binary fission?

Answer 5

Bacteria cell grows and replicates it DNA
The DNA move to opposite sides of the cell
A new cell wall forms down the middle
Bacteria splits

Question 6

What is the mean division time?

Answer 6

The mean time it takes for a cell to divide

Question 7

How to calculate bacterial growth:

Answer 7

Division time

=Amount of division rounds