Bio Questions

Front 1

cells carry genetic information in packages of DNA called....

Back 1

chromosomes

Front 2

most______ have only one strand of circular DNA

Back 2

prokaryotes

Front 3

in eukaryotic cells, the genetic structure consist of DNA and a tightly wound protein which together form a substance called...

Back 3

chromatin

Front 4

the beadlike structure formed by DNA wrapped around__________ molecules are called nucleosomes

Back 4

8 histone protein

Front 5

________make possible the precise separation of DNA during cell division

Back 5

chromosomes

Front 6

what is the name of the type of cell division in prokaryotic cell cycle

Back 6

binary fission

Front 7

what happens during interphase?

Back 7

G1 G2 S phase

Front 8

in eukaryotic cells what happens in the g1 phase?

Back 8

cells grow and synthesize

Front 9

what happens in G2 in eukaryotic cells?

Back 9

cells prepare for division

Front 10

in eukaryotic cells, what are the two main stages for cell divison?

Back 10

interphase mitosis

Front 11

during prophase, when the cell chromosomes become visible what are the duplicated strands of DNA called?

Back 11

chromatid

Front 12

where do the chromatids join together

Back 12

centromeres

Front 13

what structures are spindle fibers attached to that pull the paired chromosomes apart?

Back 13

kinetochores

Front 14

chromosomes separate and move to opposite ends of the cell

Back 14

anaphase

Front 15

chromosomes become visible, the centrioles take up positions on opposite sides of nucleus

Back 15

prophase

Front 16

nuclear envelope reforms around chromosome clusters, nucleolis becomes visible in daughter cell

Back 16

telophase

Front 17

chromosomes line up in the center of the cell

Back 17

metaphase

Front 18

in which phase do chromosomes become visible?

Back 18

prophase

Front 19

in which phase do the chromosomes move until they form 2 groups on opposite ends of spindles?

Back 19

anaphase

Front 20

what is cytokinesis

Back 20

division of cytoplasm

Front 21

cytokinesis in animals cells

Back 21

cleavage furrow centrioles seen asters not seen

Front 22

cytokinesis in plant cells

Back 22

cell plate centrioles not seen asters seen

Front 23

t/f

cells tend to continues dividing when they come into contact with other cells

Back 23

false stop

Front 24

t/f

cell division speeds up when the healing process nears completion

Back 24

false slow down

Front 25

t/f

proteins called growth factors regulate the timing of the cell cycle in eukaryotic cells

Back 25

false cyclin

Front 26

t/f

if chromosomes have not attached to the spindle fibers during metaphase, an internal regulatory protein will prevent the cell for entering anaphase

Back 26

true

Front 27

t/f

growth factors are external regulatory proteins that slow down the cell cycle

Back 27

false speed up

Front 28

t/f

once apoptosis is triggered, a cell proceeds to self-destruct

Back 28

true

Front 29

what is cancer?

Back 29

when cells has uncontrolled growth

Front 30

what is the cause of cancer?

Back 30

defective check point gene

Front 31

radiation and chemotherapy________

Back 31

stop the cell cycle at a specific check point

Front 32

cancer cells do not respond to signals that regulate cell _____

Back 32

growth

Front 33

cancer cells form a mass of cells called a

Back 33

tumor

Front 34

cancer cells may break loose and____throughout the body

Back 34

spread

Front 35

cancer cells for tumors in other tissues by____

Back 35

metastasis

Front 36

DD and dd are genotypes for tall and short, they are....

Back 36

alleles of the same gene

Front 37

what did mendel see when he cross fertilized P plants that had different alleles?

Back 37

all F1 plants has the trait of one or the other plant

Front 38

crossing red and white snapdragons yields seed that grow into pink snapdragons, what do these results support?

Back 38

blending hypothesis of inheritance

Front 39

crossing 2 pink snaps. yields red, white, and pink seeds, these results support....

Back 39

unblended discrete units of inheritance hypothesis

Front 40

what is the physical basis for the independent assortment observation that mendel made

Back 40

homologous chromosomes are randomly separated during meiosis 1

Front 41

the law of independent assortment states that in genetic formation, gene pairs are_________

Back 41

transmitted independently to each other

Front 42

when mendel crossed plants and followed 2 characters(dihybrid cross) he saw a 9:3:3:1 ratio of characters in the offspring, what did he conclude?

Back 42

complete dominance

Front 43

a picture of the set of chromosomes from a cell is___

Back 43

karyotype

Front 44

people with down syndrome have

Back 44

a diploid set of chromosomes plus one extra #21