Cell cycle

Question 1

what is the eukaryotic cell cycle?

Answer 1

Cell replication (mitosis) involves a single cell dividing into two genetically identical daughter cells.
For cells to divide they must undergo the cell cycle

Question 2

what are the sections of interphase?

Answer 2

• G1 phase: Cell grows larger, organelles replicate
  
  • G0 phase (not all cells): resting state
  • S phase: Nucleus and DNA is replicated
    G2 phase: Cell grows larger and increases energy stores

Question 3

what are the sections of mitosis?

Answer 3

• Prophase: Chromosomes condense, centrosomes move to opposite poles of the cell, nuclear membrane breaks down, spindle fibres begin forming
  • Metaphase: Chromosomes line up along the equator of the cell, spindle fibres attach to centromere.
  • Anaphase: Spindle fibres contract, splitting chromosomes by their centromere to opposite ends of the cell

Telophase: Chromosomes decondense, nuclear membranes form, spindle fibres disassemble.

Question 4

How does cytokineses occur in plant cells?

Answer 4

Cell plate begins to form along the midline of the parent cell, dividing the two cells

Question 5

How does cytokineses occur in animal cells?

Answer 5

the plasma membrane pinches in to form a cleavage furrow which extends until the cell separates