MITOSIS

Question 1

body cells normally have two copies of each chromosome, this makes them

Answer 1

diploid cells

Question 2

chromosomes are

Answer 2

coiled up lengths of DNA molecules

Question 3

when a cell divides by mitosis…

Answer 3

it makes two cells identical to the original cell . the nucleus of each new cell contains the same number of chromosomes as the original cell.

Question 4

body cells in multicellular organisms …

Answer 4

divide

Question 5

body cells in multicellular organisms divide to produce new cells during a process called the..

Answer 5

cell cycle

Question 6

multicellular organisms use mitosis to….

Answer 6

grow or to replace cells that have been damaged.

Question 7

some organisms also use mitosis to…

Answer 7

reproduce

Question 8

some organisms use mitosis to reproduce. this is called….

Answer 8

asexual reproduction

Question 9

what is an example of asexual reproduction

Answer 9

strawberry plants form runners by mitosis, which become new plants.

Question 10

in a cell that is not dividing, the DNA is all spread out in

Answer 10

long strings

Question 11

before it divides, the cell has to…

Answer 11

grow and increase the volume of subcellular structures such as mitochondria and ribosomes. it then duplicates its DNA - so there is one copy for each new cell.

Question 12

the DNA is copied and forms..

Answer 12

X-shaped chromosomes. each ‘arm’ of the chromosomes is an exact duplicate of of the other.

Question 13

once its contents and DNA have been copied, the cell is ready for..

Answer 13

mitosis

Question 14

mitosis is divided into how many stages?

Answer 14

4 stages

Question 15

the four stages that mitosis are divided into are:

Answer 15

prophase, anaphase, telophase, metaphase

Question 16

prophase

Answer 16

the chromosomes condense , getting shorter and fatter. the membrane around the nucleus breaks down and the chromosomes lie free in the cytoplasm.

Question 17

metaphase

Answer 17

the chromosomes line up at the centre of the cell.

Question 18

anaphase

Answer 18

cell fibres pull the chromosomes apart.

Question 19

telophase

Answer 19

membranes form around each of the sets of chromosomes. these become the nuclei of the two new cells.

Question 20

before telophase ends..

Answer 20

the cytoplasm and cell membrane divide to form two separate cells.

Question 21

the cytoplasm and cell membrane divide to form two separate cells. this process is called…

Answer 21

cytokinesis

Question 22

at the end of mitosis, the cell has produced ..

Answer 22

two new daughter cells

Question 23

each daughter cell contains ..

Answer 23

exactly the same sets of chromosomes in its nucleus as the other daughter cell. they are genetically identical diploid cells.

Question 24

each daughter cell contains exactly the same sets of chromosomes in its nucleus as the other daughter cell. they are genetically identical diploid cells. they are also genetically identical to ….

Answer 24

the parent cell

Question 25

describe what happens during the interphase stage of the cell cycle.

Answer 25

the cell grows (increases in size) , more subcellular structures are made such as mitochondria and ribosomes, and DNA replicates