DNA

Question 1

What is heredity?

Answer 1

Inheritance

Question 2

What is a trait?

Answer 2

Characteristic caused by genetics

Question 3

What is DNA?

Answer 3

Self- replicating carrier of genetic info

Question 4

What is a chromosome ?

Answer 4

DNA packaged with protein

Question 5

The cell needs ___ copies of DNA before it can divide

Answer 5

2

Question 6

Sister chromatids are…

Answer 6

DNA + exact copy, same DNA but condensed

Question 7

What do centrioles do during mitosis

Answer 7

Send out fibers

Question 8

What do spindle fibers do during mitosis

Answer 8

pull sister chromatids to opposite sides when the cell is about to divide

Question 9

What does the centromere do during mitosis

Answer 9

Where the sister chromatids are attached after the DNA is replicated

Question 10

The _____ anchor the spindle fibers

Answer 10

centrioles

Question 11

The nuclear membrane dissolves during

Answer 11

prophase

Question 12

The _____ holds the sister chromatids together

Answer 12

centromere

Question 13

What happens during cytokinesis

Answer 13

Cytoplasm divides to make 2 daughter cells

Question 14

Mitosis results in

Answer 14

2 cells that are identical to each other

Question 15

Three phases of cell cycle:

Answer 15

Interphase, Mitosis, cytokinesis

Question 16

Three stages of interphase

Answer 16

G1, S, G2

Question 17

G1

Answer 17

growth 1, cell increases in size, normal amount of DNA present

Question 18

S

Answer 18

synthesis, DNA is copied, cell has 2x normal amount of DNA

Question 19

G2

Answer 19

Growth 2, DNA loosely packed (2x DNA), cell makes materials it needs to divide

Question 20

Mitosis

Answer 20

Division of cell nucleus (4 steps)

Question 21

Cytokinesis

Answer 21

division of cytoplasm

Question 22

large molecules made of double strands of nucleotides

Answer 22

DNA

Question 23

Section of DNA strand with info for making specific protein

Answer 23

gene

Question 24

DNA wrapped around histone proteins (stabilizes DNA)

Answer 24

Chromatin

Question 25

Tightly coiled chromatin; visible as X form during mitosis

Answer 25

chromosomes

Question 26

In the cell cycle, the period between cell divisions is

Answer 26

interphase

Question 27

what phase of mitosis usually occurs at the same time as cytokinesis?

Answer 27

telophase

Question 28

as cells increase in size they have difficulty with meeting all their needs for nutrients because

Answer 28

the volume of the cell increases much more than the surface area for diffusion

Question 29

the process of cell division results in

Answer 29

2 daughter cells

Question 30

what process ensures that each daughter cell gets one complete set of genetic information and that each daughter cell has increased surface area?

Answer 30

mitosis

Question 31

what is one false statement about mitosis?

Answer 31

mitosis produces variation In a species

Question 32

the stage of the cell cycle when the cytoplasm divides to produce 2 new daughter cells

Answer 32

cytokinesis

Question 33

during which phase of the cell cycle does the cell make a copy of its DNA

Answer 33

interphase

Question 34

cells copy their DNA during

Answer 34

S

Question 35

If the cell cycle is compared to the human life cycle, then G1 would be like

Answer 35

childhood

Question 36

the sister chromatids are attached to each other at an area called the

Answer 36

centromere

Question 37

in plants, the structure that forms between the divided nuclei is the

Answer 37

cell plate

Question 38

at the beginning of cell division, a chromosome consists of 2

Answer 38

centromeres

Question 39

at the end of mitosis, each daughter cell has

Answer 39

the same number and kinds of chromosomes as in the parent cell

Question 40

centrioles separate during

Answer 40

prophase