Lab 7- The cell cycle and Cellular Division

Question 1

What are the phases of the cell cycle?

Answer 1

Interphase, Prophase, Metaphase, Anaphase, Telophase, and cytokinesis

Question 2

What is the longest phase in the cell cycle?

Answer 2

Interphase (8-10 hours)

Question 3

Growth Phase (G1)- metabolically active and increase in size

Answer 3

Interphase

Question 4

Synthesis Phase (S)- chromosomes are duplicated through the process of DNA replication in the nucleus forming sister chromatids that are held together by a centromere (6-8 hours)

Answer 4

Interphase

Question 5

2nd Growth Phase- necessary Structures and molecules for mitosis are synthesized (4-6 Hours)

Answer 5

Interphase

Question 6

Nuclear Membrane disintegrates

Spindle Microtubules that guide chromosomes during mitosis are assembled at the centrosomes (Opposite ends of the cell)

Answer 6

Prophase

Question 7

Protein Spindle Microtubules become attacked to each sister chromatid at the centromere

Aligned at the center of the cell along an equatorial plate

Answer 7

Metaphase

Question 8

Sister Chromatids begin to separate and are now called chromosomes

Chromosomes are pulled toward opposite plates of the cell by the spindle microtubules

Most Dynamic and easily observed Mitosis phase

Answer 8

Anaphase

Question 9

Begins when the chromosomes reach the opposite poles of the cell

Chromosomes crowd together at the poles

reorganization of a nucleus begins within each of the 2 groups of chromosomes

Nuclear Envelope is reconstructed around the now daughter nuclei and Spindle microtubules disappear

Answer 9

Telophase

Question 10

What occurs the same time as Telophase?

Answer 10

Cytokinesis

Question 11

What is Chromatin?

Answer 11

DNA wound around histone proteins, thickens and condenses in a process called DNA packing