All cells arise from other cells

Question 1

Mitosis

Answer 1

produces two daughter cells that have the same number of chromosomes as the parent cell and each other

Question 2

meiosis

Answer 2

produces 4 daughter cells each with half the number of chromosomes of the parent cell

Question 3

Interphase

Answer 3

cell is actively synthesising proteins. chromosomes invisible. Prior to mitosis, DNA replicates

Question 4

Prophase

Answer 4

Chromosomes become visible. Nuclear envelope disintegrates. Nucleolus disappears

Question 5

Metaphase

Answer 5

Spindle forms. Chromosomes line up on the centre of the cell

Question 6

Anaphase

Answer 6

Spindle fibres attached to chromatids contract. Chromatids are pulled towards poles

Question 7

Telophase

Answer 7

Chromosomes reach poles and become indistinct. Nuclear envelope forms. Nucleolus reforms and spindle disintegrates

Question 8

Cell division in prokaryotic cells

Answer 8

• circular DNA molecule replicates and both copies attach to the cell membrane
• the plasmids also replicate

Question 9

Virus Replication

Answer 9

Being non-living, viruses do not undergo cell division. Following
injection of their nucleic acid, the infected host cell replicates the
virus particles.

Question 10

Treatment for Cancer

Answer 10

Prevent DNA from replicating

inhibit etaphase stage