Chapter 5 The Mitotic Cycle

Question 1

Describe what happens in the cell cycle during interphase, G1

Answer 1

Replicating organelles
Cells growing in size
Protein synthesis

Question 2

What happens during to cells during interphase, the s phase

Answer 2

DNA doubles in size (dna synthesis)

End of s phase- all chromosomes will be replicated

Question 3

What do cells who go in G0 phase (decide not to divide) do?

Answer 3

May differentiate, die or stop dividing

Question 4

What is the overall process of mitosis?

Answer 4

Separation of chromosomes to opposite parts of cells, so cells can divide
Cell division

Question 5

What happens during prophase?

Answer 5

SDDF

• DNA supercoils, into shorter, condensed structure.
• nuclear envelope disintegrates
• centriole divide, move to opposite ends of pole.
• spindle fibers form from centrioles, make up spindle apparatus.

Question 6

What organelle do plants not have?

Answer 6

Centriole

But have spindle fibers formed from cytoplasm

Question 7

What happens during metaphase?

Answer 7

• chromosomes attach to spindle fibers at centromere
• pulled along spindle fibers to equator of cell(center)

A.P

Question 8

What happens during anaphase?

Answer 8

S.S

• chromatids on each chromosome separate, and pulled to opposite poles of cell.
• chromosomes split, while still attached to spindle fibers, moves to separate poles. (Motor proteins help)

Question 9

Motor protons are used, what process occurs and which organelle helps?

Answer 9

Requires ATP, mitochondria gather round spindle.f

Question 10

What happens during telophase?

Answer 10

• nucleus reappears
• N.E disintegrates
• chromosomes lengthen & uncurl

RDL

Question 11

Cytokinesis in animals?

Answer 11

Membrane folds inwards