BIO 2.5 The Cell Cycle

Question 1

Interphase

Answer 1

• Day-to-day activities (cellular processes).
• Preparation for cell division (Mitosis):
   Grows (about double in size)
   DNA replicates (duplicates)

Question 2

What is mitosis ? What are the 4 stages of mitosis ?

Answer 2

Division of the nucleus and DNA

–Prophase
–Metaphase
–Anaphase
–Telophase

Question 3

Prophase

Answer 3

• Chromatin condenses into chromosomes.
• Nuclear membrane disappears.

Question 4

Metaphase

Answer 4

• Chromosomes line up along the equator (centre/middle).

Question 5

Anaphase

Answer 5

• Sister chromatids are pulled apart by the spindle fibers retracting, splitting the centromere.
• Now separated, the sister chromatids are called “daughter chromosomes”

Question 6

Telophase

Answer 6

• Nuclear membrane reforms around two identical/complete sets of DNA.

Question 7

Cytokinesis

Answer 7

• Cleavage furrow forms in animal cells.
• Cell plate forms in plant cells.
• Division of the cell (cytoplasm).