demo

Question 1

what is the purpose of a cell cycle checkpoints

Answer 1

if the conditions are met then it determines if the cell can continue to the next phase

Question 2

purpose of metaphase checkpoint

Answer 2

to ensure that that all the chromosomes are aligned at the spindle equator before anaphase is initiated.

Question 3

what would happen if the cell cycle was not regulated

Answer 3

cells can divide without order and accumulate genetic errors that can lead to a cancerous tumor

Question 4

what happens in G1

Answer 4

cell undergoes growth increasing amount of cytosol. it also synthesis proteins that are needed for DNA replication

Question 5

what happens in S

Answer 5

the parent cell synthesises or replicated DNA by the end it has two identical copies of its original DNA

Question 6

what happens in G2

Answer 6

further growth in preparation for cell division, DNA duplicated

Question 7

what happens in M

Answer 7

mitosis and cytokinesis
- spindle fibres have formed and chromosomes have lined up in the right position
- division of cell

Question 8

two features describing stem cells

Answer 8

A) self renewal
ability to divide while maintaining unspecialised state
B)potency
ability to differentiate and transform into specialised cells

Question 9

totipotency

Answer 9

most powerful potency found in zygote

Question 10

pluripotency

Answer 10

any cell expect embryonic cell found in placenta

Question 11

multipotent

Answer 11

rise to limited number of cells found in bone marrow

Question 12

embryonic stem cells

Answer 12

are from the inner cell mass of blastocysts are embryos