Redo 4

Front 1

T/F multicellular organisms also use cell division to repair and renew cells that die

Back 1

true

Front 2

A cell's genetic information, packaged as DNA is called its

Back 2

genome

Front 3

in porkaryotes the genome is a . .

Back 3

single long DNA moleucule

Front 4

in eukaryotes the genome consists of

Back 4

several DNA moleucles

Front 5

Human somatic cells have how many chromosomes?

Back 5

46

Front 6

Human gametes have how many chromosomes?

Back 6

23

Front 7

During animal cell cytokinesis what forms where the cell pinchest into two by a ring of actin micorfilaments

Back 7

cleavage furrow

Front 8

Kinetochores of joined sister chromatids face in what direction?

Back 8

opposite

Front 9

During the latter stages of prophase some spindle microtubules attach to what?

Back 9

kinetochores

Front 10

T/F spindle fibers shorten during anaphase fromthe end attached to the centrosome not the chromosome

Back 10

false it shortens from the end attached to the chromosome not the centrosome

Front 11

Prokayrotes repoduce by binary fission or mitosis?

Back 11

binary fission

Front 12

in. . . . . . , relipcated chromsomes are attached to the nulcear envelope

Back 12

dinoflagellates

Front 13

cyclic changes cause the cell cycle to. .

Back 13

act as a clock with cell division occuring at regular intervals

Front 14

During the latter stages of prophase some spindle microtubules attach to what?

Back 14

kinetochores

Front 15

T/F spindle fibers shorten during anaphase fromthe end attached to the centrosome not the chromosome

Back 15

false it shortens from the end attached to the chromosome not the centrosome

Front 16

Prokayrotes repoduce by binary fission or mitosis?

Back 16

binary fission

Front 17

in. . . . . . , relipcated chromsomes are attached to the nulcear envelope

Back 17

dinoflagellates

Front 18

cyclic changes cause the cell cycle to. .

Back 18

act as a clock with cell division occuring at regular intervals

Front 19

During the latter stages of prophase some spindle microtubules attach to what?

Back 19

kinetochores

Front 20

T/F spindle fibers shorten during anaphase fromthe end attached to the centrosome not the chromosome

Back 20

false it shortens from the end attached to the chromosome not the centrosome

Front 21

Prokayrotes repoduce by binary fission or mitosis?

Back 21

binary fission

Front 22

in. . . . . . , relipcated chromsomes are attached to the nulcear envelope

Back 22

dinoflagellates

Front 23

cyclic changes cause the cell cycle to. .

Back 23

act as a clock with cell division occuring at regular intervals

Front 24

There are three cirical chekc points for the cell cycle:

Back 24

M, G1 and G2

Front 25

A cell that receives a proper signal at the _______ checkpoint will usually complete the cycle and divid

Back 25

G1

Front 26

If a cell does not receive the proper signal at the G1 checkpoint it will leave the cell cycle and enter what is called

Back 26

G0 or a non dividng cycle

Front 27

what is one key type of molecule that is important in cell cycle regulation that activate or inactivate other enzymes

Back 27

cyclin-dependent kinases

Front 28

Cyclin-dependent kinases are in constant or fluctuateable amounts through the cycle

Back 28

constant

Front 29

Kinetochores not yet attached to spindle microtubules appear to create a protein that prevents a complex of proteins from doing what?

Back 29

breaking down cyclins and inactivating the proteins holding the sister chromatids together

Front 30

what divides rapidly and invade other tissues, disrupting the normal functioing of various organs, often have abnormalities and cord out cells that do act normally

Back 30

cancer cells

Front 31

T/F we may have many cancer cells in our lifetime

Back 31

true but our immune system often detects thema nd removes them

Front 32

when cancer cells evade detection by the immune system they can form a

Back 32

benign tumor

Front 33

when cancer cells spread to other tissues and organs they form secondary tumors and are called

Back 33

malignant

Front 34

What are the 4 phases of mitosis?

Back 34

prophase, metaphase, anaphase and telophase

Front 35

What is the first phase of mitosis?

Back 35

prophase

Front 36

What is the second phase of mitosis?

Back 36

metaphase

Front 37

What is the thrid phase of mitosis

Back 37

anaphase

Front 38

waht is the fourth phase of mitosis?

Back 38

telophase

Front 39

Which of the phases of mitosis loses the nucleolus and nuclear membrane allowing the chromosomes to migrate around cell

Back 39

prophase

Front 40

Which of the phases of mitosis is where the mitotic spindle begins to form and composed of centorsomes and microtubules

Back 40

Prophase

Front 41

The assmebly of spindle microtubules start in the. .. . .

Back 41

centrosome

Front 42

centrosome has a pair of . . . . in the center that direct the production of microtubules called . . . and . . . .

Back 42

centrioles, asters and spindle fibers

Front 43

Which of the phases of mitosis where chromosomes move up and line up in the equator

Back 43

metaphase

Front 44

Which of the phases of mitosis where microtubules form poles. Microtubules from each pole attach to different kinetechores

Back 44

metaphase

Front 45

Which of the phases of mitosis is wehre microtubules push chromatids until arranged at the metaphase plate

Back 45

metaphse

Front 46

Which of the phases of mitosis is wehre centromere start to divide into two parts each part attached to a sister chromatid

Back 46

anaphase

Front 47

Which of the phases of mitosis is where two groups of chromatids reach opposite poles

Back 47

telophase

Front 48

Which of the phases of mitosis is where cells begin to elongate as free spindle fibers from each centrosome push off each other

Back 48

telophase

Front 49

Which of the phases of mitosis is where cytokinesis usually beings

Back 49

telophase

Front 50

what is the divison of cytoplasm

Back 50

cytokinesis