cell division

Question 1

division of prokaryotes

Answer 1

binary fission

Question 2

type of cell produced in meiosis

Answer 2

haploid

Question 3

chromosome number of mosquito

Answer 3

6

Question 4

chromosome number of adders tongue fern

Answer 4

1262

Question 5

chromosome number of humans (diploid)

Answer 5

46

Question 6

chromosome number of chimp

Answer 6

48

Question 7

chromosome number of potato

Answer 7

48

Question 8

chromosome number of dog

Answer 8

78

Question 9

chromosome number of onion

Answer 9

16

Question 10

what happends during g1

Answer 10

cells are recovering from earlier cell division
synthesize component for cell growth
dna synthesis

Question 11

what happens during s phase

Answer 11

dna replication, synthesis

Question 12

dna is undergoing __ model of replication

Answer 12

semi-conservative

Question 13

what happens during g2 phase

Answer 13

more growth
checking replication of dna
chromosomes condense - tightly coiled

Question 14

composition of chromosomes

Answer 14

DNA, RNA, proteins (histones)

Question 15

unit of dna wrapped around histone

Answer 15

nucleosome

Question 16

sister chromatids are attached by proteins called

Answer 16

cohesins

Question 17

what happens during prophase

Answer 17

chromosomes shorten
centrioles move to opposite side
nuclear envelope disappears
spindle apparatus begins to form

Question 18

what happens during metaphase

Answer 18

chromosomes line up at along center of cell
chromosomes attach to spindle fibers
spindle fibers are clearly visible

Question 19

in animal cells, spindle fibers originate from __

Answer 19

centrioles

Question 20

in plant cells, __ forms like a scaffold for cell plate assembly

Answer 20

phragmoplast

Question 21

when does spindle fiber begin to break

Answer 21

anaphase

Question 22

what happens in telophase

Answer 22

dna uncoils
spindle and astral fibers completely disappear
cytokinesis happens with most cells
cytoplasm and organelles move

Question 23

difference between cell movement of plant and animal cell during telophase

Answer 23

animal cell - inward or invaginates and forms cleavage furrow
plant cell - from the middle outward

Question 24

cells that do not undergo cytokinesis

Answer 24

coenobium or coenocytes

Question 25

what happens when a cell does not undergo cytokinesis

Answer 25

presence of multiple nuclei

Question 26

pairing of homologous chromosomes

Answer 26

synapsis

Question 27

exchange of segments of homologous chromosomes

Answer 27

crossing over

Question 28

when does synapsis and crossing over occur

Answer 28

prophase I

Question 29

point of crossing over

Answer 29

chiasmata

Question 30

does dna double before meiosis II

Answer 30

no

Question 31

most important checkpoint

Answer 31

g1

Question 32

if the cell does not pass through g1 phase, what will happen

Answer 32

it will proceed to the g0 phase

Question 33

what is checked in m checkpoint

Answer 33

chromosome attachment after prometaphase to proceed with anaphase

Question 34

when is m checkpoint happening

Answer 34

prometaphase

Question 35

types of regulatory proteins involved in cell cycle control

Answer 35

cyclin and cyclin-dependent kinases

Question 36

cyclin-cdk complex that triggers a cell’s passage past the g2 phase checkpoint into the m phase

Answer 36

maturation-promoting factor (MPF)

Question 37

when does mpf and cdk peak

Answer 37

mitosis

Question 38

signal for anaphase to proceed is transmitted through

Answer 38

anaphase-promoting complex or APC

Question 39

function of APC

Answer 39

activates proteins that remove the cohesin