4.2 Overview of Photosynthesis•Set up Cornell Notes on pg. 57

•Topic: 5.1 The Cell Cycle

•Essential Question:

1.Using Table 5.2 to help you: Do you think a skin cell would have a long or short G1 stage? Explain why.

2.1 Atoms, Ions, and Molecules

1. Using Table 5.2 to help you: Do you think a skin cell would have a long or short G1 stage? Explain why.

5.1 The Cell Cycle

KEY CONCEPT Cells have distinct phases of growth, reproduction, and normal functions.

4.2 Overview of Photosynthesis

1. On pg. 56 of your INB please draw a picture bubble map of the Cell Cycle. (Each part labeled and explained)

G1

SG2

5.1 The Cell Cycle

Why do you think that you always have to cut your hair, your fingernails, and the lawn?

The growth is made by new cells being made.

5.1 The Cell Cycle

KEY CONCEPT Cells have distinct phases of growth, reproduction, and normal functions.

5.1 The Cell Cycle

Cycles

5.1 The Cell Cycle

Your body cells go through a cycle too. This cycle allows new cells to be created to heal or replace dead or damaged cells.

5.1 The Cell Cycle

• The cell cycle is a regular pattern of growth, DNA replication, and cell division that occurs in eukaryotic cells.

• The cell cycle is the process of duplicating somatic or body cells

5.1 The Cell Cycle

•Cells carry out their normal functions

•Cells increase in size

•Organelles increase in number

* Cells spend most of their time here

STAGE 1- Gap 1 (G1)

5.1 The Cell Cycle

•Cell makes a copy of its nuclear DNA

•By the end of S stage the cell contains 2 complete sets of DNA

STAGE 2- Synthesis (S)

5.1 The Cell Cycle

•Cells continue to carry out their normal functions

•Additional growth occurs

STAGE 3- Gap (G2)

5.1 The Cell Cycle

•Mitosis

•The division of a body cell’s nucleus and its contents

•2 new nuclei form

•Cytokinesis

•The process that divides the cell cytoplasm

*

STAGE 4 (includes 2 processes)

5.1 The Cell Cycle

The result of the cell cycle is 2 daughter cells that are identical to the original cell

5.1 The Cell Cycle

Cells divide at different rates.

• The rate of cell division varies with the need for those types of cells.

• Some cells are unlikely to divide (G0).