mitosis 2- lqc 5

Question 1

cytokinesis

Answer 1

(division of cytoplasm)
In animal cells, a ring of protein filaments on the inside of the cell surface membrane contract and constrict to divide the cell. Plants cells synthesise a new cell plate down the middle of the cell.

Question 2

what is mitosis

Answer 2

• Nuclear division (division of the nucleus), where two genetically identical daughter diploid nuclei are produced from one parent diploid nucleus.
• A stage in the cell cycle

Question 3

what is the role of mitosis

Answer 3

• To produce 2 new cells which are genetically identical to the parent cell - each with the
  diploid number of chromosomes
• To increase cell numbers for growth
• To replace damaged or dead cells to repair damaged tissue
• Asexual reproduction (in some organisms – read the question)

Question 4

How can you use PMAT to remember what happens in the different stages of mitosis?

Answer 4

P – prophase – prepare
M – metaphase – middle
A – anaphase – apart
T – telophase – two (nuclei, not cells!) or terminate (end)