Final Exam Extras

Question 1

What are the steps of bacteria cell division?

Answer 1

1. Chromosome attaches to plasma membrane (remember no nuclear membrane exists)
2. Chromosome replicates
3. Cell grows and ring of FtsZ protein forms.
4. FtsZ ring constricts. Membrane and cell wall begin to pinch at ring
5. Fission complete

Question 2

When are chromosomes replicated?

Answer 2

During the S-phase of interphase

Question 3

What are the four phases of the cell cycle?

Answer 3

1—G1
2—S
3—G2
4—Mitosis

Question 4

What are sister chromatids?

Answer 4

Two identical strands which are joined along entire length and at centromere

Question 5

How does cytokinesis in animals differ from plants?

Answer 5

• -Animal cells divide using a cleavage furrow

- -Plant cells divide using a cell plate

Question 6

Do microtubules shorten at the centrosome or the kinetochore?

Answer 6

kinetochore

Question 7

How do microtubules move chromosomes?

Answer 7

Tubulin subunits are removed by the kinetochore and motor proteins “pull/walk” the chromosome towards the centrosome