Cell Cycle

Where is DNA/chromosomes stored in the cell?

• nucleus

• golgi apparatus

• ribosomes

• chloroplasts

Tags

NGSS.MS-LS3-1

Why do your cells divide?

• to make more cells so you can grow

• to replace cells that are old or damaged with new ones

• both answers are correct

Tags

NGSS.MS-LS1-1

Before cells can divide, what must be copied?

• mitochondria
• cytoplasm
• DNA
• Cell Wall

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NGSS.HS-LS1-4

During this phase of the cell cycle, DNA is replicated or copied.

• G1 phase

• S phase

• G2 phase

• Mitosis

• Cytokinesis

Why does a cell need to copy its DNA?

• to store extra copies of DNA in your liver

• to ensure that each new cell gets a copy of DNA

Tags

NGSS.MS-LS3-1

NGSS.MS-LS3-2

A supercoiled/tightly packaged DNA molecule is called a ___.

• nucleus

• histones

• chromosome

• cytokinesis

Why would the cell supercoil/package DNA tightly into a chromosome?

• so it won't get tangled when the DNA is moved around during mitosis

• so that bacteria can't find it

Two identical chromosomes/copies of DNA are called sister chromatids, and they are held together by a molecule called a centromere, until they are ready to be separated during mitosis.

Identify the sister chromatids in the image shown.

• A

• B

Look at the cell cycle phases. What happens during mitosis?

• carry out normal functions

• replicate/duplicate the DNA

• prepare for cell division

• divides the nucleus

• divide the cytoplasm

In which phase of the cell cycle is DNA replicated?

• G1

• S

• Prophase

• G2