3.2.1 - The Cell Cycle

Question 1

What Is the Cell Cycle?

Answer 1

Process in which cells divide to produce 2 genetically identical daughter cells for growth, repair and asexual reproduction.

Question 2

What Are The 3 Phases Of The Cell Cycle?

Answer 2

~ Interphase.

~ Mitosis (Nuclear division).

~ Cytokinesis (Cell division).

Question 3

What Does The Length Of The Cell Cycle Depend On?
(3 Points)

Answer 3

~ Environmental conditions.

~ Cell type.

~ Type of organism.

Question 4

What Is The Movement From One Phase To Another Triggered By?

Answer 4

Chemical signals called cyclins.

Question 5

What Occurs During Interphase?
(2 Points)

Answer 5

~ Cell increases in mass and size and continues to carry out its normal cellular functions.

~ 3 phases.

Question 6

What Are The 3 Phases That Occur In Interphase?

Answer 6

~ G1 phase.

~ S phase.

~ G2 phase.

Question 7

What Happens During The G1 Phase?
(3 Points)

Answer 7

~ Organelles and DNA replicates.

~ High levels of transcription and translation.

~ Size of the cell increases.

Question 8

What Happens During The S Phase?
(2 Points)

Answer 8

~ Chromosomes are replicated and condense and begin to form chromatin.

~ DNA in the nucleus replicates, resulting in each chromosome consisting of two identical sister chromatids.

Question 9

What Happens During The G2 Phase?
(5 Points)

Answer 9

~ Cells prepare to divide, replicating organelles for a full set in each new cell.

~ Replaces energy stores used during the S phase.

~ Continues to carry out transcription and translation.

~ Any damaged chromosomes are repaired.

~ Cell continues to grow.

Question 10

Describe Cytokinesis?
(2 Points)

Answer 10

~ Follows mitosis.

~ Cytoplasm divides, producing 2 daughter cells.