Introduction to Cell Cycle

The Cell Cycle

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Pages 42-43
Assignment: Cell Cycle and Mitosis
Date: 9/22-9/26

Pick up handout for notes

Paste onto page 42 in your notebook

Fill out information and label diagrams on your handout using the information from the slides provided

We will put something on page 43 on Tuesday :)

Learning Target

Describe the specific events occurring in each stage of the cell cycle

What are chromosomes?

DNA contains genetic information and is located within the nucleus of a eukaryotic cell. DNA coils tightly around histone proteins to form chromatin. Chromatin is a complex of DNA and protein that functions to package long DNA molecules into more compact and denser structures. This genetic information is bundled into packages called chromosomes. A

chromatid is one of the two identical halves of a chromosome that have been replicated in preparation for cell division. The two sister chromatids are joined at a constricted region of the chromosome called the centromere.

1-Eukaryotic Cell Nucleus
2-Chromatin
3-DNA
4-Sister Chromatids
5-Chromosomes
6-Centromere

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Label the Diagram

Multiple Choice

Where is DNA found in a eukaryotic cell?

• Golgi body

• Nucleus
• Ribosomes
• Endoplasmic reticulum

Multiple Choice

What holds the two sister chromatids together?

• Centromere
• Nucleus
• Cell membrane
• DNA

​What is the cell cycle?

The cell cycle is a series of events that takes place as a cell grows and divides to make two new identical cells, called daughter cells. The stages of the cell cycle are divided into interphase and the mitotic phase. A cell spends most its time in interphase and interphase is broken down into three stages: G1, S, and G2. During the mitotic phase (M), the cell separates duplicated DNA into two sets, and divides its cytoplasm into two cell in a process called cytokinesis (C).

Multiple Choice

What part of the cell cycle is the longest stage?

• G1

• M phase

• Interphase
• S

Label the diagram on your handout using the diagram provided (we will color it later!)

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The Cell Cycle

Multiple Choice

What is the order of stages within interphase?

• G1 phase, S phase, G2 phase
• S phase, G1 phase, G2 phase
• G2 phase, S phase, G1 phase
• G1 phase, G2 phase, S phase

Introduction to the Cell Cycle

Multiple Choice

What happens in the cell during the S stage of interphase?

• The cell undergoes mitosis
• The cell divides into two daughter cells
• The cell's DNA is replicated
• The cell rests and prepares for division