CELL BIOLOGY

Question 1

what happens during meiosis

Answer 1

division that gives rise to gametes(sperm and egg cells).

4 haploid cells each containing only one chromosome

Question 2

what happens in mitosis?

Answer 2

genetic identity of equal daughter cells.

Question 3

what is the cell cyle?

Answer 3

its a sequence of growth, DNA replication, and cell division that all cells go through

Question 4

name the different parts of the cell cycle?

Answer 4

interphase 
-G1 phase
-S phase (DNA replication)
-G2 phase
M phase (mitosis)
(cytokenesis)

Question 5

what are kinases?

Answer 5

theyre enzmyes that transfer phosphate from ATP onto specific substrate protiens which can cause a confirmational change and often affects their activity.

Question 6

what are the phases of mitosis?

Answer 6

prophase , prometaphase , metaphase, anaphase, telophase

Question 7

what happens in prophase?

Answer 7

Chromatin condenses (can begin in G2) , centrioles divide and migrate, kinetochores , kinetochore fibres and spindles form/

Question 8

what happens in prometaphase?

Answer 8

nuclear envolope breaks down , spindle has access to chromosomes.

Question 9

what happens during metaphase?

Answer 9

initially , chromosomes are randomlu place in otion but come to lie halfway between spindle poles in METAPHASE PLATE

Question 10

what happens during anaphase?

Answer 10

paired chromatids separate at their kinetochores and start to move along MTs to opposite poles

Question 11

what happens during telophase?

Answer 11

daughter chromosomes arrive at poles, new nuclear envelope forms

Question 12

what are the 3 classes of microtubules which make up the mitotic spindle?

Answer 12

spindle pole
replicated chromsome
kinetochore

Question 13

what do kinetichores do?

Answer 13

they attach chromosomes to the mitotic spindle