Cell Cycle

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

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

In which phase of the cell cycle is DNA replicated?

• G1

• S

• Prophase

• G2

Cells of organism must replicate for ?

• growth

• repair of damaged cells

• replacement of dying cells.

• All of the above

Tags

NGSS.MS-LS1-5

Why would it be important to replicate DNA before a cell divides in mitosis or meiosis?

• In order for genetic information to be transferred into daughter cells.

• In order for the cell to be able to increase in size.

• In order for the DNA to be contained in the nucleus.

• In order for the cell to re-order the DNA sequencing in the new cells.

Tags

NGSS.HS-LS1-4

____ is a series of events a cell goes through as they grow and divide?

• Cell Division

• Cell Cycle

• Cytokinesis

• Mitosis

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

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

• nucleus

• histones

• chromosome

• cytokinesis

Tags

NGSS.MS-LS3-1

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