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AP Biology The Cell Cycle Part 1. One cell becoming two.

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Presentation on theme: "AP Biology The Cell Cycle Part 1. One cell becoming two."— Presentation transcript:

1 AP Biology The Cell Cycle Part 1

2 One cell becoming two

3 Binary Fission in Prokaryotes Origin of replication Cell wall Plasma membrane Bacterial chromosome E. coli cell Two copies of origin 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. Origin Replication finishes. The plasma membrane grows inward, and new cell wall is deposited. Two daughter cells result.

4 Chromatin vs. Chromosomes appearance within the cell.

5 Coiling up of Chromatin using histones

6 Somatic cells vs. Germ cells The egg surrounded by sperm.

7 Sister Chromatids

8 Mitosis (1 Division) vs. Meiosis (2 Divisions)

9 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)

10 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.) This question addresses Essential Knowledge: 1.B.1


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