Download Cell Cycle part 1 - Fort Thomas Independent Schools

AP Biology
The Cell Cycle
Part 1
One cell becoming two
Binary Fission in
Prokaryotes
Cell wall
Origin of
replication
E. coli cell
Chromosome
replication begins.
Soon thereafter,
one copy of the origin
moves rapidly toward
the other end of the cell.
Replication continues.
One copy of the origin
is now at each end of
the cell.
Replication finishes.
The plasma membrane
grows inward, and
new cell wall is
deposited.
Two daughter
cells result.
Plasma
membrane
Bacterial
chromosome
Two copies
of origin
Origin
Origin
Chromatin vs. Chromosomes
appearance within the cell.
Coiling up of Chromatin
using histones
Somatic cells vs. Germ cells
The egg surrounded by sperm.
Sister Chromatids
Mitosis (1 Division) vs.
Meiosis (2 Divisions)
• Question: The ability to reproduce and pass
on the vital DNA information and other
essential cytoplasmic machinery to the next
generation is a basic function of all life.
Without this reproductive ability, life would
cease to exist on earth. In no more than three
sentences, describe the THREE essential
components of reproduction that exists in all
cells, prokaryotic and eukaryotic. (5 Points)
•
• Scoring Rubric: 1pt. Discussion of the
reproduction/synthesis of DNA.
•
1pt. Discussion of the
reproduction of cytoplasmic components.
•
1pt. Discussion of the
division of the cytoplasm and cell membrane.
•
1pt. Correct use of scientific terms.
•
1pt. Answer has no more than
three sentences. (Following Directions.)