Mitosis test one

Question 1

what happens at end of prometaphase

Answer 1

microtubule attaches to unattached sister kinetochore orienting each chromatid to opposite sides

Question 2

interval between chromosome duplication and beginning of mitosis DNA repair and protein prepared for nuclear division

Answer 2

G2

Question 3

what does CDK do

Answer 3

activates DNA transcription factors in G1 confirms replication and repair are complete in G2

Question 4

what is the time frame of G1

Answer 4

9 hours

Question 5

separation of sister chromatids pulls one towards opposite pole, kinetochore microtubules shorten when chromatid goes near pole

Answer 5

anaphase

Question 6

what are checkpoints

Answer 6

signals that tell the cell not to move forward in the cell division

Question 7

where does chromosomes attach to microtubules

Answer 7

kinetochore, located in centromere of chromosome

Question 8

what is the time frame of mitosis

Answer 8

one hour

Question 9

cell may grow during this phase, also synthesizes proteins that are essential to the subsequent steps of mitosis itself

Answer 9

G2

Question 10

what Factor initiates a cell division

Answer 10

CDK cyclin dependent kinase

Question 11

nulcei are packaged into two separate daughter cells

Answer 11

cytokinesis

Question 12

due to break down of nucleoli, what production ceases

Answer 12

ribosome

Question 13

what are the three parts of interphase

Answer 13

G1, synthesis, G2

Question 14

mitotic spindle begins to form

Answer 14

prometaphase

Question 15

when does cytokinesis end

Answer 15

after telophase

Question 16

what period is when chromosomes are neither duplicating nor dividing

Answer 16

G1

Question 17

where do microtubules come from

Answer 17

centrosome in the cytoplasm

Question 18

what factors initiate a cell division cycle

Answer 18

time cell size molecular trigger (factor)

Question 19

what is the time frame of synthesis

Answer 19

5 hours

Question 20

cell achieves most of its growth by using the info from its genes to make and assemble the materials it needs to function normally

Answer 20

G1

Question 21

in what stages of interphase do the centrosomes replicate

Answer 21

S and G2

Question 22

what cycle varies in length more than any other phase of the cell cycle

Answer 22

G1

Question 23

during synthesis are the sister chromatids joined together

Answer 23

yes

Question 24

break down of nuclear envelope, allowing microtubules from centrosome to invade nucleus

Answer 24

prometaphase

Question 25

each chromosome doubles to produce identical sister chromatids that will become visible when the chromosomes condense at beginning of mitosis

Answer 25

synthesis

Question 26

what is the time frame of G2

Answer 26

3 hours

Question 27

what is a syncytium

Answer 27

an animal cell with two or more nuclei

Question 28

centrosomes move apart towards opposite end and become clearly distinguishable as separate entities in the microscope

Answer 28

prophase

Question 29

spindle fibers disperse nuclear envelope reforms, one or more nuclei reappear uncondense chromatids

Answer 29

telophase

Question 30

what are the three microtubules that make up the mitotic spindle

Answer 30

kinetochore microtubules polar microtubules astral microtubules

Question 31

what do you find in the centrosome

Answer 31

centrioles

Question 32

chromosomes begin to condense

Answer 32

prophase

Question 33

time when the cell duplicates its genetic material by synthesizing DNA

Answer 33

synthesis

Question 34

when does cytokinesis start

Answer 34

anaphase

Question 35

in prometaphase, are both sister chromatids attached to a kinetochore

Answer 35

no just one

Question 36

forces pulling sister chromatids toward opposite poles are in equilibrium

Answer 36

metaphase

Question 37

the connection of sister chromatids to opposite spindle poles sets in motion them chromatids to move to center of cell

Answer 37

metaphase

Question 38

what happens in G0

Answer 38

temporarily paused or terminally differentiated

Question 39

the darkly stained nucleoli begin to break down and disappear

Answer 39

prophase

Question 40

are sister chromatids attached at centromere during prophase

Answer 40

yes

Question 41

how does plant cell division occur

Answer 41

by vesicles depositing cell wall material to form a new cell plate

Question 42

what phase do you begin to see microtubules outside nucleus

Answer 42

interphase