The Cell Cycle

Question 1

what two states do cells in the body alternate between

Answer 1

division & non-division
- division means cell is active

Question 2

what is a cell cycle

Answer 2

sequence of events from one division to another

Question 3

what are the 3 phases of somatic cells cell cycle

Answer 3

interphase, mitosis, cytokinesis

Question 4

interphase

Answer 4

longest phase; period of non-division
-at the beginning they are half the size of the parent cell due to just finishing mitosis
-G1 : bulking with doubling in size and RNA and proteins synthesize
-S : duplication of DNA
-G2 : growth

Question 5

when is a cell ready to divide

Answer 5

mitosis

Question 6

checkpoints of interphase

Answer 6

at G1 to ensure readiness for DNA synthesis
at G2 to determine if cell is ready to enter mitosis and divide

Question 7

What happens if cell is severely damaged

Answer 7

cell suicided (apoptosis)

Question 8

necrosis

Answer 8

significant trauma of cell damages surrounding cells

Question 9

mitosis

Answer 9

division of the nucleus to replace dead or wounded cells
-prophase : x shape takes form due to coiling
-metaphase : centromere attachment occurs, move to center
-anaphase : centromeres break and they begin to move towards the poles
-telophase : arrive at poles and fibers disappear

Question 10

cytokinesis

Answer 10

division of the cytoplasm

Question 11

Explain the resting G0 phase

Answer 11

can be temporary
- cells like hair cells & neurons that have reached an end stage will stay in G0

Question 12

Why do we get cancerous cells?

Answer 12

B/c the cells are multiplying at a rate they shouldn’t becoming paraistes

Question 13

what do you get at the end of mitosis

Answer 13

2 identical daughter cells