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Flashcards in lecture 1-20-16 Deck (40)
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1

-copy cellular contents
-duplicate organelles, DNA, and cytoplasm
-each new cell has the same amount as original cell
-called interphase
-G1,S,G2

preparatory phase

2

cell grows, makes extra cytoplasm

G1 Phase

3

DNA replication occurs, chromosomes
identical sister chromatids

S Phase

4

cell prepares for division

G2 phase

5

three parts of interphase __ ____ and ____

G1, S and G2

6

division phase includes

mitosis and cytokinesis

7

cytokinesis is

the division of other organelles

8

-chromosomes are evenly divided
-sister chromatids are separated
-centromere

mitosis

9

-enlarged cell splits into two cells
- each has full complement of DNA
- one parent cell into two daughter cells

cytokinesis

10

how do cells divide?

cytokinesis

11

occurs in a series of phases;
M Phase

Mitosis

12

phases in order

interphase
mitosis and cytokinesis
anaphase
telophase

13

-each chromosome is replicated in S phase, resulting in two sister chromatids connected at the centromere
-chromosomes are loosely gathered in the nucleus

interphase

14

-replicated chromosomes begin to coil up
-nuclear membrane begins to disassemble
-microtubule fibers begin to form the mitotic spindle

prophase

15

-microtubule spindle fibers from opposite ends of the cell attach to the sister chromatids of each chromosomes
-replicated chromosomes become aligned along the middle of the cell

metaphase

16

-microtubules shorten pulling the sister chromatids to opposite ends of the cell

anaphase

17

-identical sets of chromosomes reach each pole
-microtubule spindle fibers disassemble
-nuclear membrane forms around each set of chromosomes forming the daughter cell nuclei

telophase

18

the structure that separates sister chromatids during mitosis

the mitotic spindle

19

hollow protein fibers
key components of cytoskeletons
attach the centromere on chromosome via kinetochore proteins

microtubules

20

following mitosis and cytokinesis, daughter cells are __________

genetically identical to each other
genetically identical to the parent cell

21

in the cell cycle, DNA is replicated during ______

the S phase

22

during ____in animal cells the cell membrane pinches in to separate the daughter cells

cytokinesis

23

which of the following processes require normal cell division?

all of the above
1. embryonic development
2. wound healing
3.

24

during which stage of the cell cycle do sister chromatids separate from each other ?

anaphase

25

cytokinesis in plant cells involves the synthesis of a ___________ between the daughter cells

cell wall

26

during which stage of the cell cycle are sister chromatids initially produced

interphase

27

most chemotherapy drugs target cell cycle they _____

interfere with DNA replication, chromosome separation
look to plants as source of drugs

28

the pacific yew is one species of a family of related evergreen trees

taxus brevifolia

29

taxus brevifolia

extract from bark kills cancer cells
taxol

30

-interferes with the normal organization of microtubule
- prevents microtubules from shortening
- chromatids not separated

taxol