2. Cell Cycle
Life cycle of a cell is called the cell cycle
Begins when the cell is formed and ends when the
cell divides and forms new cells
Before a cell divides, it must make a copy of its
DNA
The DNA of a cell is organized into chromosomes
3. Making More Prokaryotic Cells
Prokaryotic cells are not very complex
Cell division is fairly simple because of this
Binary fission is the simple cell division of
prokaryotes in which one cell splits into two
Each of the resulting cells contains one copy of the
DNA
4. Eukaryotic Cells and their DNA
Eukaryotes are usually larger and more complex
Because of this they have a lot more DNA
Chromosomes of a eukaryote contain DNA and
proteins
The number of chromosomes in eukaryotes differs
from organism to organism and has nothing to do
with how complex the organism is
5. Eukaryotic Cells and their DNA
Fruit flies have 8 chromosomes
Potatoes have 48 chromosomes
Humans have 46
The 46 are actually made up of 23 pairs of similar
chromosomes known as homologous
chromosomes
6.
7. Math Break
It takes Cell A 6 hours to complete its cell cycle and
produce 2 cells.
The cell cycle of Cell B takes 8 hours.
How many more cells would be formed from Cell A
than from Cell B in 24 hours?
16
Cell A: 24 hrs/6 hrs per cycle = 4 cycles - 8
8 more cells
2x2x2x2= 16
formed by Cell A
Cell B: 24 hrs/8 hrs per cycle= 3 cycles compared to Cell B
2x2x2= 8
