200 300 400 500 100 200 300 400 500 100 200 300 400 500 100 200 300 400 500 100 200 300 400 500 100 DNA Know your chromosome Cell Cycle Name that phase.

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Presentation transcript:

DNA Know your chromosome Cell Cycle Name that phase Cell Cycle again

DNA is found ?

In the nucleus

What are the smaller units of DNA?

Nucleotides

What are the 3 parts of a nucleotide

Deoxyribose sugar, phosphate group and nitrogen base (ATG or C)

DNA replication proceeds in ___ direction/s?

TWO

Describe DNA replication

DNA replication occurs when the enzymes unzip the DNA molecule and DNA Polymerase helps to place nucleotides to form complimentary copy of the existing DNA. 2 identical copies are produced.

Each replicated chromosome consists of 2 ?

Sister Chromatids

______ connect sister chromatids.

Centromere

Chromosomes contain proteins called ___

Histones

Cells chromesomes copy during__?

S phase.

First phase in which the chromosomes become visible.

Prophase

Longest phase of the Cell Cycle?

Interphase

What are the 3 phases of Interphase?

G1,S, G2

What divides during mitosis?

nucleus

What is cytokinesis?

Separation of the cytoplasm.

Describe what happens at each phase of the cell cycle

G1-growth, S-DNA replication,G2 prep for mitosis, Prophase-Chromatin condenses, spindle fibers form, Centrioles separate, Nuclear memebrane breaks down, Metaphase-chromosomes align in the middle of the cell. Anaphase-chromosomes move away from the center. Telophase-new membranes form.

A series of events that cells go through as they grow and divide

Cell cycle

Anaphase

Prophase

Interphase

Telophase

Metaphase

What is the role of cyclins?

Regulate cell growth

What should happen when cells come in contact with other cells

They should stop growing

A disorder in which some cells have lost the ability to control their growth

Cancer

Cancer cell form masses of cells called

tumor

A parent cell having 4 chromosomes will produce two daughter cells that contain two daughter cells each containing__ chromosome

4

What is one structure used in mitosis that is found in animal cells and not plant cells.

centrioles