cell division

Question 1

what are chromosomes made up of

Answer 1

DNA molecules combined with proteins. Contains genes which provide the instructions for protein synthesis

Question 2

what is a gene

Answer 2

section of DNA which codes for protein

Question 3

how many chromosomes are found in the nucleus of human body cells

Answer 3

46

Question 4

how many chromosomes are found in the nucleus of gametes

Answer 4

23

Question 5

how are chromosomes arranged in the nucleus of a body cell?

Answer 5

arranged in pairs- 46 chromosomes, 23 PAIRS

Question 6

3 main stages of the cell cycle

Answer 6

1)Replications of DNA and synthesis of organelles
2)Mitosis
3)Division of cell

Question 7

why is mitosis important

Answer 7

produces identical cells which all have the same genetic information
produces additional cells for growth and repair

Question 8

first stage of the cell cycle

Answer 8

cells grow and increase in mass, replicate DNA and synthesize more organelles

Question 9

second stage of cell cycle

Answer 9

each chromosome in a pair is pulled to opposite poles of the cell then the nucleus divides

Question 10

third stage of the cell cycle

Answer 10

cytoplasm and cell membrane divide- two identical daughter cells are produced

Question 11

what is a stem cell

Answer 11

unspecialized cell which is capable in differentiating into other cell types of self-renewal