Cell Cycle

why do cells divide?

1. Growth 2. repair damage 3. replace dying cells

teleomers

4 total

During what phase of the cell cycle does cell division occur?

M phase

During what phase of the cell cycle does mitosis and cytokinesis occur?

M phase

S

DNA replication

G2

prepares for mitosis

Put the following stages of mitosis in order: anaphase, prophase, metaphase, and telophase

prophase, metaphase, anaphase, telophase

Anaphase

sister chromatids are pulled apart

metaphase

sister chromatids lineup in the middle of the cell

During what phase of the cell cycle does the cell prepare for mitosis?

G2

prophase

breaks down nucleus, spindles fibers form, chromatin to chromosomes

What is a series of events that cells go through as they grow and divide?

cell cycle

G1

cell grows

Put the following actions in order: DNA, replication, cell grows, cell division, cell prepares for mitosis

cell grows, DNA replication, cell prepares for mitosis, cell division

cytokinesis

cell splits into, chromosomes to chromatin

Centromere

holds sister chromatids together

M

cell division

sister chromatids

genetically identical

Explain why cells don't just continue to grow larger as organisms grow larger. Why do cells divide?

Cells need to stay small, so when they get big enough they divide. Small size allows the cell to get nutrients it needs in the center of the cell quickly. Cells that are too large can't get nutrients to the center quick enough and die.

During what phase of the cell cycle does the cell grow?

G1 & G2

Put the following stages of the cell cycle in order: G2, S, G1, M

G1, S, G2, M

Put the following in order: G2, G1, S, mitosis, cytokinesis

G1, S, G2, mitosis, cytokinesis

During what stage does the G1, S, and G2 phases happen?

interphase

What is the longest stage of the cell cycle called?

interphase

why aren't we one giant cell?

1. DNA overload 2. surface area to volume ratio

cell theory

1. all living things are made from one or more cells 2. cells are the basic unit of life 3. all cells come from pre-existing cells

teleophase

2 nuclei form

How many stages are there in mitosis?

4

chromosomes

Long strands of DNA; in human body, 23 pairs

During what phase of the cell cycle is DNA replicated?

S phase

Chromatin

loosely packed DNA; interphase