Mitosis

Question 1

G1, S, G2

Answer 1

G1: cell growth replication of organelles
S: DNA synthesis.
G2: prep for division construction of micro tubules

Question 2

Supercoiling

Answer 2

DNA wraps around Justine’s to form nucleosome. Coiling of nucleosome creates soleroids. Soleroids attach to protein scaffold and for looped domains.

Question 3

Prophase

Answer 3

Supercoiling. Explain chromatids. Centrioles move to poles, spindle forms. Animals have two centrioles. Nuclear membrane breaks down.

Question 4

Metaphase

Answer 4

Spindle fibers attach to centromere. Micro tubule contraction causes chromosomes to line up on equatorial plain.

Question 5

Anaphase

Answer 5

Continued contraction of spindle cause sister chromatids to separate and move to opposite ends of cell. Each chromatid is one chromosome.

Question 6

Telophase

Answer 6

Spindle dissolves, new nuclear membranes, chromosomes decondense. Cytokinesis occurs concurrently.

Question 7

G1 G2 Metaphase

Answer 7

G1 check to S. G2 check to M. Both controlled by enzymes (cyclin Cdk) Metaphase check to anaphase.

Question 8

Interphase

Answer 8

Time between cell divisions