Lec 38

Question 1

Interphase

Answer 1

Organelles double in number or volume

DNA replication

Centrosome replication

Cell elongates (plant cells)

Question 2

Prophase

Answer 2

Centrosomes move to poles

Chromosomes condense

Question 3

Prometaphase

Answer 3

Nuclear envelop is gone

MT connects to targets

Question 4

Metaphase

Answer 4

Chromosomes move to the middle

Question 5

Anaphase

Answer 5

Chromatids separate

Chromosomes move to poles

Cell elongates (animal cells)

Question 6

Telophase

Answer 6

Chromosomes de-condense

Nuclear envelop reforms

Question 7

Cytokinesis

Answer 7

Contractile ring (animal cells)

Vesicles containing cellulose (plant cells)

Question 8

Chromosome proteins

Histones

Answer 8

Balls of eight little proteins

wrapped in DNA

Compacts DNA

Question 9

Cohesion rings

Answer 9

Larger heterotrimer rings made of three polypeptides

Put onto DNA before DNA replication in G1

After DNA replication, they trap chromatids together

Question 10

Condensins

Answer 10

Similar to cohesions

Compacts and condenses DNA during prophase

Question 11

Kinetochore proteins

Answer 11

Allows MTs to connect to centromere DNA

Question 12

Cellulose

Answer 12

Polysaccharide

Cellulose rings allow water in to make the plant cell to expand into a rectangle

Question 13

Water is always trying to get

Answer 13

into plant cells

Question 14

Intermediate filaments during interphase

Answer 14

Allow formation of nucleus

Surrounded by nuclear membrane

Question 15

IFs during prometaphase

Answer 15

Are broken down and deactivated

undone during telophase

Question 16

Nuclear membrane during prometaphase

Answer 16

goes to corner of the cell

undone during telophase

Question 17

Microtubules during prometaphase

Answer 17

are named by what they are attached to

Question 18

3 types of MTs

Answer 18

Aster Mts- inner surface of plasma membrane

Kinetochore MTs

Interpolar MTs- MTs from opposite pole

Question 19

Kinetochore MTs

Answer 19

MTs search for and capture chromosomes and move them to the middle of the cell during metaphase

Question 20

Kinetochore MTs during anaphase

Answer 20

Disassemble

Question 21

Aster MTs

Answer 21

Anchor centrosomes

Question 22

Interpolar MTs

Answer 22

Elongate the cells for animal cells

Question 23

Anaphase A involves

Answer 23

Chromosomes being pulled toward centrosomes

using kinetochore MTs

Question 24

Anaphase B

Answer 24

Centrosomes move apart

Done by interpolar MTs and Aster MTs

Question 25

MTs during cytokinesis in plant cells

Answer 25

interpolar MTs are involved

Question 26

Actin filaments

Answer 26

form ring for cytokinesis in animal cells

they are guided by interpolar MTs