Mitosis

Question 1

Mitosis

Answer 1

Cell reproduces itself to form two identical daughter cells with the same number of chromosomes as the parent cell - It important for growth and repair of cells and Asexual reproduction.

Question 2

Interphase

Answer 2

Interphase is before Mitosis. The cell grows and increases its sub-cellular structures and duplicates its DNA.

Question 3

Prophase

Answer 3

Chromosomes condense and become visible
Nucleolus disappears and nuclear envelope breaks down
Centrioles move to opposite poles of the cell and sindle fibres begin to form

Question 4

Metaphase

Answer 4

Chromosomes arrange themselves at the equator of the cell.
Attached to spindle fibres at their centromeres

Question 5

Anaphase

Answer 5

Spindle fibres contract
Centromere divides
Sister chromatids separate into two distinct chromosomes and are pulled by spindle fibres to opposite poles of the cell

Question 6

Telophase

Answer 6

Spindle fibres break down
Chromosomes become longer and thinner until they become chromatin and invisible
Nuclear envelope and nucleolus re-form.

Question 7

Binary Fission

Answer 7

DNA molecule and plasmids replicate and attach to the cell surface membrane
Cell membrane grows between 2 DNA molecules dividing the cytoplasm into 2
A new cell wall forms between the 2 DNA molecules diving the original cell into 2 new identical daughter cells.

Question 8

Cause of Tumours

Answer 8

uncontrolled cell division

Question 9

Malignant vs Benign

Answer 9

Malignant Tumour grows more rapidly, less compact, More likely to be life threatening and cause cancer

Question 10

Treatments of Cancer

Answer 10

Often involved disrupting cell cycle and cell division e.g Chemotherapy

Question 11

Hair Loss in Chemotherapy

Answer 11

Hair producing cells divide rapidly and are often affected by the chemotherapy as well