cell division

Question 1

G1

Answer 1

-when the cell grows
-organelles and proteins are made

Question 2

S

Answer 2

-DNA is replicated

Question 3

G2

Answer 3

-cell keeps growing and proteins needed for cell division are made

Question 4

G0

Answer 4

-when a cell is not going through the cell cycle
-specialised cells

Question 5

chromosomes

Answer 5

section of DNA

Question 6

chromatid/sister chromatids

Answer 6

one of the two strands of a chromosome that can be joined together if they are sister chromatids

Question 7

centromeres

Answer 7

holds sister chromatids together

Question 8

centrioles

Answer 8

organelle responsible for mitosis

Question 9

prophase

Answer 9

-chromatids condense by supercoiling (shorter and thicker)
-nuclear membrane disintegrates
-centrioles separate
-spindle starts to form from centrioles

Question 10

metaphase

Answer 10

-spindle has been formed
-chromatids attach to spindle by centromere
-chromatid pairs line up in single file along the equator of the cell

Question 11

anaphase

Answer 11

-centromeres split into 2
-spindle fibres shortened to pull chromosomes to poles
-chromosomes pulled towards the poles, centromere first

Question 12

telophase

Answer 12

-spindle disintegrates
-nuclear membrane reforms (cell has 2 nuclei)
-chromosomes start to thin out
-cytokensis

Question 13

binary fission

Answer 13

-replication of circular DNA and plasmids
-division of the cytoplasm to produce two daughter cells, each with a single copy of the circular DNA and a variable number of copies of plasmids.