The Cell Cycle - MITOSIS

Question 1

As a cell increases in size, what happens to: oxygen usage? volume? and then what must the cell do?

Answer 1

* it uses more blood and oxygen * its volume increases faster than the surface area * the cell must then divide

Question 2

What 3 things happen during Cell Cycle?

Answer 2

* the cell grows * the cell prepares for division * the cell divides into two daughter cells

Question 3

The 3 Mains steps of the cell cycle:

Answer 3

* Interphase * Mitosis * Cytokindesis

Question 4

Interphase: What is the cell doing? What happens during the 3 main phases?

Answer 4

* cell grows, carries out daily function, and prepares to divide * 3 main phases of interphase - ~ G1 - Growth Phase ~ S - DNA is copied ~ G2 - Growth Phase - Organelles are made

Question 5

Mitosis four phases:

Answer 5

The stage where the nucleus divides and is broken up int 4 phases: * Prophase * Metaphase * Anaphase * Telophase

Question 6

Cytokinesis The cytoplasm is……

Answer 6

Process in which the cell’s cytoplasm is divided equally between two cells

Question 7

Cleavage Furrow vs. Cell Plate In animal cells…. In plant cells…..

Answer 7

* in animal cells, the cell membrane pinches in to separate the cytoplasm * in plants, a cell plate develops dividing the cytoplasm

Question 8

When a chromosome has been copied, each is referred to as a ________, _______ connected by a ________

Answer 8

* When a chromosome has been copied, each is referred to as a sister chromatid connected by a centromere.

Question 9

The 5 Phases of Mitosis

Answer 9

1. Interphase - not really a part, but essential due to DNA replication 2. Prophase 3. Metaphase 4, Anaphase 5. Telophase

Question 10

Prophase the (longest or shortest) phase? _____________ visible TWO centrioles do what? the sister chromatids then………..

Answer 10

* the longest phase * chromosomes become visible *two centrioles move to opposite sides of the nucleus & spindle fibers form * this causes the sister chromatids to separate to the poles

Question 11

Metaphase The chromosomes move where?

Answer 11

* the chromosomes move to the middle of the nucleus (metaphase plate)

Question 12

Anapahse the centromeres….. which causes the sister ______ to _________________

Answer 12

* the centromeres that join the sister chromatids split * this causes the sister chromatids to separate to the poles

Question 13

Telophase the chromatids do what?

Answer 13

* the chromatids start to relax and the nuclear envelope reforms

Question 14

Uncontrolled Mitosis =

Answer 14

Cancer