All cells arise from other cells

Question 1

Growth 1

Answer 1

Growth before DNA replication

Question 2

GO

Answer 2

temporary cellular quiescence or terminal differentiation

Question 3

S

Answer 3

replication of DNA and RNA

Question 4

G2

Answer 4

further growth and organelle replication

Question 5

checkpoint

Answer 5

comes after G2, possible apoptosis

Question 6

mitosis 1)

Answer 6

prophase:
- chromosones condense into chromatid rods
- chromatid arms lose cohesion
- nuclear envelope disintegrates
- centrioles seperate to opposite poles and nucleate spindle fibres

Question 7

mitosis 2)

Answer 7

metaphase:
- sister chromatids form a metaphase plate
- microtubules maintain a symmetrical bipolar spindle
-spindle checkpoint

Question 8

mitosis 3)

Answer 8

anaphase:
- centromere splits and cohesion is lost
- spindle fibres retract and chromosones are pulled to opposite poles
- cleavage plane determined

Question 9

mitosis 4)

Answer 9

telephase:
- chromosones decondense at opposite poles
- nuclear envelope starts to reform

Question 10

cytokinesis

Answer 10

• cell constricts into two identical daughter cells through the formation of an acto-myosin ring