PMAT

Question 1

Interphase

Answer 1

Cells make a copy of chromosomes involving replication of DNA

Question 2

Prophase

Answer 2

• The chromosomes coil and become shorter and fatter
• Protein fibres form a spindle in the cell
• Each chromosome consists of 2 chromatids

Question 3

Metaphase

Answer 3

• One or more spindle fibre attaches to centromere

- Chromosomes line up in centre of spindle

Question 4

Anaphase

Answer 4

• Centromere divides
• Spindle fibres shorten and pull one pair of sister chromatid to opposite poles of spindle.
• We can now refer to chromatids as chromosomes

Question 5

Telophase

Answer 5

• A nuclear envelope forms around each set of chromosomes
• Chromosomes become long and thin
• Cytoplasm divides to form 2 cells(cytokinesis)

Question 6

Cytokinesis

Answer 6

When the cytoplasm divides to form 2 new cells during mitosis