3.2.2 All cells arise from other cells

Question 1

Mitosis is part of the cell in which?

Answer 1

Eukaryotic cells divide to produce 2 daughter cells each with identical copies of DNA produced by the parent cell during DNA replication

Question 2

What is the Cell cycle?

Answer 2

Cycles of division with intermediate growth periods

Question 3

Outline the stages of the Cell cycle

Answer 3

• Interphase
• Mitosis/Meiosis
• Cytokinesis

Question 4

Explain why the cell cycle dosen’t occur in some cells

Answer 4

After differentiation some types of cells in multicellular organisms no longer have the ability to divide

Question 5

What is the difference between the Cell cycle and Mitosis?

Answer 5

Cell cycle: cycles of divisions with growth periods in between
Mitosis: only a small percentage of the cell cycle and refers to only nuclear division

Question 6

Outline what happens during Interphase

Answer 6

G1: cell synthesises proteins for replication e.g. tubilin for spindle fibres and the cell size doubles
S: DNA replication , chromosomes consist of 2 sister chromatids joined at a centromere
G2: organelles divide

Question 7

State the purpose of Mitosis

Answer 7

To produce 2 genetically identical daughter cells for:
- Growth
- Cell replacement and tissue repair
- Asexual reproduction

Question 8

Name the stages of Mitosis

Answer 8

• Prophase
• Metaphase
• Anaphase
• Telophase

Question 9

Outline what happens during Prophase