eukaryotic cell cycle 3

Question 1

What are the phases of cell cycle in order

Answer 1

Interphase
Prophase
prometaphase
metaphase
anaphase
telophase
IPPMAT

Question 2

What cell cycle comes after metaphase when the chromosomes are lined up in the middle

Answer 2

anaphase

Question 3

what happens in anaphase.

Answer 3

sister chromatids separate

a=apart

Question 4

where do the sister chromatids go

Answer 4

to the poles

Question 5

How do sister chromatids go to the poles

Answer 5

kinetochore microtubules shorten
microtubule flux
microtubule depolymerization (+ end)

Question 6

what do the motor proteins do in anaphase

Answer 6

move the spindle poles apart are the sister chromatids separate

Question 7

what regulates anaphase

Answer 7

APC/C targets securin for destruction
Activates separase (protease)
Separase cleaves cohesin, releasing sister chromatids

Question 8

what are the 2 process in anaphase.

Answer 8

separate sister chromatids

move spindle poles apart

Question 9

Interphase 3-4 phases

Answer 9

G1 (G0), S, G2

Question 10

what phase comes after anaphase

Answer 10

telophase

Question 11

what happens in telophase

Answer 11

disassemble mitotic spindle
reform nuclear envelope
chromosome packed into daughter nuclei
chromosome uncoil to get ready for interphase

Question 12

is cell division complete after telophase

Answer 12

NO, Mitosis (M phase) is

Question 13

where are daughter cells in telophase

Answer 13

at each pole

Question 14

what comes after telophase

Answer 14

cytokinesis (right after)

Question 15

what is cytokinesis

see slide 21

Answer 15

where the cytoplasm divides

Question 16

in animal cell what is the thing called that starts to separate two cells

Answer 16

cleavage furrow

Question 17

in plant cell what is the thing called that separates two cells

Answer 17

cell plate

Question 18

what is the cleavage furrow made of

Answer 18

Contractile ring of actin (microfilament) and myosin

Question 19

what makes the cell plate up

Answer 19

Vesicles from Golgi apparatus
Polysaccharide and glycoproteins
Cellulose added (from vesicles) to form cell wall

Question 20

what carried the cellulose to the cell plate

Answer 20

golgi apparatus

Question 21

look at slide 22, print it out

Answer 21

study the hell out of this slide 22

Question 22

Which of the following events occurs in mitotic metaphase?

Answer 22

D. Chromosome alignment at the spindle equator

Question 23

Indicate whether each of the following occurs mainly in G1 phase (G), S phase (S), or G2 phase (H) of the cell cycle. answer each one
( ) DNA helicase activation
( ) DNA helicase deposition on DNA at the replication origins
( ) ORC phosphorylation
( ) Licensing of replication origins

Answer 23

S,G,S,G

Question 24

Consider two kinesin motor proteins at the mitotic spindle midzone: kinesin-5 is a tetrameric motor that walks toward the plus end of both microtubules to which it is attached via its motor domains; kinesin-14, on the other hand, walks toward the minus end of one microtubule while it is attached to another microtubule via its tail domain. How do these motors affect the length of the spindle?

Answer 24

C. Kinesin-5 works to lengthen the spindle whereas kinesin-14 works to shorten it.

Question 25

How is centrosome duplication similar to DNA replication? A. They both use a semiconservative mechanism. B. They are initiated at around the same time in the cell cycle, near the G1/S transition. C. They are both controlled in such a way that they replicate once and only once per cell cycle. D. They are both separated from their sister copies in mitosis. E. All of the above.

Answer 25

E. All of the above.

Question 26

``` Indicate true (T) and false (F) statements below regarding mitosis and the changes that it brings about compared to interphase. answer each one ( ) Microtubules become greatly stabilized in mitosis compared to interphase. ( ) The number of γ-tubulin ring complexes in the centrosomes increases greatly during mitosis compared to interphase. ``` ( ) A bipolar spindle can be formed even in the absence of centrosomes.

Answer 26

F,T,T

Question 27

The … is a large structure formed at the centromeric region of each eukaryotic chromosome. It captures spindle microtubules in mitosis, and therefore serves to attach the chromosomes to the spindle poles.”

Answer 27

kinetochore

Question 28

Imagine a prometaphase chromosome pair that is attached to one spindle pole. Which of the following would happen if both arms of the chromosome are severed with a strong laser beam?

Answer 28

C. The kinetochore-containing fragment would be pulled toward the pole. The two arm fragments would move away from the pole.

Question 29

Which of the following motor proteins are more directly involved in anaphase?

Answer 29

E. Kinesin-5 on interpolar microtubules and dynein on astral microtubules

Question 30

Indicate true (T) and false (F) statements below regarding cytokinesis in animal cells. answer each one ( ) The force for cytokinesis is generated by kinesin motors on microtubule bundles that form the contractile ring. ( ) As the contractile ring constricts, its thickness increases to keep a constant volume. ( ) The midbody forms from bundles of actin and myosin II. ( ) Local activation of Ran GTPase triggers the assembly and contraction of the contractile ring.

Answer 30

F,F,F,F The contractile ring is based on actin and myosin II, constricts in a dynamic fashion, and gradually disassembles. RhoA GTPase helps assemble this structure.

Question 31

Indicate true (T) and false (F) statements below regarding cytokinesis in eukaryotic cells. answer each one ( ) The preprophase band, composed of microtubules and actin filaments, marks the site of cytokinesis in plant cells. ( ) In some cell types, the site of contractile-ring formation is determined before mitosis. ( ) The early cell plate in dividing plant cells appears after phragmoplast formation. ( ) The membrane required for the newly formed cell plate in plant cells is provided by endocytosis from the equatorial plasma membrane.

Answer 31

T,T,T,F In plant cells, the preprophase band assembles just before mitosis and marks the site of cytokinesis. The assembly of the cell plate between the two daughter cells is then guided by phragmoplast. The membrane required for the formation of cell plate comes from the Golgi apparatus.

Question 32

look at the questions chapter 17 | 5.7.19.22.29.53

Answer 32

Ill email to you

Question 33

Is interphase in mitosis or m phase

Answer 33

NO

Question 34

what are stage of the cell cycle | watch bio flix animation on canvas

Answer 34

IPPMAT

Question 35

What are the stages of Mitosis or M phase

Answer 35

PPMAT

Question 36

Is cytokinesis in m phase

Answer 36

no, right after

Question 37

review prophase

Answer 37

DNA condenses into chromosomes | Mitotic spindle forms

Question 38

review prometaphase

Answer 38

Nuclear envelope breaks down | Spindle fibers contact centromere (kinetochore)

Question 39

review metaphase

Answer 39

Chromosomes align at middle of cell (metaphase plate)

Question 40

review anaphase

Answer 40

Sister chromatids separate

Question 41

review telophase

Answer 41

Nuclear envelope forms Spindle apparatus disappears Chromosomes decondense

Question 42

review cytokinesis

Answer 42

cytoplasm divides | makes 2 daughter cells