cell cycle

Question 1

what do all multicellular
beings require in terms of cells?

Answer 1

a constant supply of new cells for growth and repair

Question 2

what is the definition of the cell cycle?

Answer 2

the life cycle of a cell from the time it is made to the time it divides

Question 3

what are the stages of cell cycle?

Answer 3

growth,
dna replication
division

Question 4

what is the formal word for cell division?

Answer 4

cytokinesis

Question 5

what occurs in the first stage of the cell cycle?

Answer 5

growth: cell grows and increases the number of subcellular structures

Question 6

what occurs in the second stage of the cell cycle?

Answer 6

dna is replicated so that when the cell divides, each new cell will have a full set of dna

Question 7

what state is dna in before mitosis?

Answer 7

it is spread out in long strings

Question 8

what is the first stage of mitosis?

Answer 8

long strings of dna pair up to form chromosomes, with one half of the pair being dna from the mother and the other half dna from the father

Question 9

what is the second stage of mitosis?

Answer 9

both the mother and father half of the chrosomes duplicate

Question 10

what is the third stage of mitosis?

Answer 10

chromosomes line up in the middle

Question 11

what is the fourth stage of mitosis?

Answer 11

chromosomes are pulled away by cell fibres so that they are on opposite poles of the cell

Question 12

what is the fifth stage of mitosis?

Answer 12

cytokinesis: cells divide with the same dna on either side