LESSON 4

Question 1

Living things grow by producing _____, NOT because each cell increases in size

Answer 1

more cells,

Question 2

____ of damaged tissue

Answer 2

Repair

Question 3

If cell gets too ___, it cannot get enough ____ into the cell and wastes out of the cell

Answer 3

big ; nutrients

Question 4

Many organisms, especially ____ organisms, reproduce by means of cell division – called asexual reproduction

Answer 4

unicellular

Question 5

Many organisms, especially unicellular organisms, reproduce by means of cell division – called ____ reproduction

Answer 5

asexual

Question 6

DNA is located in the ____ and controls all cell activities including cell division

Answer 6

nucleus

Question 7

Long and thread-like DNA in a non-dividing cell is called _____

Answer 7

chromatin

Question 8

Doubled, coiled, short DNA in a dividing cell is called _____

Answer 8

chromosome

Question 9

2 identical “sister” chromatids attached at an area in the middle called a _____

Answer 9

centromere

Question 10

Why does DNA need to change from chromatin to chromosome?

Answer 10

More efficient division

Question 11

Every organism has its own specific number of ____

Answer 11

chromosomes

Question 12

Human = ___ chromosomes or ___ pairs

Answer 12

46 ; 23

Question 13

Dog = __ chromosomes or pairs

Answer 13

78; 39

Question 14

Goldfish = __ chromosomes or pairs

Answer 14

94 - 47

Question 15

Lettuce = ___ chromosomes or ___ pairs

Answer 15

18; 9

Question 16

All ______) cells in an organism have the same kind and number of chromosomes

Answer 16

somatic (body

Question 17

______ – series of events cells go through as they grow and divide

Answer 17

Cell Cycle

Question 18

Cell grows, prepares for division, then divides to form 2 daughter cells

Answer 18

cell cycle

Question 19

Interphase

Answer 19

G1 Phase
S(synthesis) Phase
G2 Phase

Question 20

M(Mitotic) Phase

Answer 20

Prophase
Metaphase
Anaphase
Telophase

Question 21

period of cell growth and development

Answer 21

interphase

Question 22

Where the cell spends most of its time the whole cell cycle

Answer 22

interphase

Question 23

During ___ the cell also grows, carries out normal cell activities, replicates all other organelles

Answer 23

Interphase

Question 24

first gap

Answer 24

G1 phase

Question 25

Cell increase in size and volume

Answer 25

G1 phase

Question 26

Carbohydrates, lipids, proteins, and enzymes are produced in preparation for S and M phase

Answer 26

G1 PHASE

Question 27

DNA replication stage

Answer 27

s phase

Question 28

Synthesis of DNA

Answer 28

s phase

Question 29

DNA that will be passed on the daughter cells in M phase is replicated

Answer 29

s phase

Question 30

Second gap

Answer 30

G2 Phase

Question 31

Replenishment of energy and synthesis of Tubuline Dimers are produced

Answer 31

G2 Phase

Question 32

Replenishment of energy and synthesis of Tubuline Dimers are produced

Answer 32

G2 Phase

Question 33

Preparation for cell division

Answer 33

G2 Phase

Question 34

division of the nucleus into 2 nuclei, each with the same number of chromosomes

Answer 34

mitosis

Question 35

____ occurs in all the somatic (body) cells

Answer 35

Mitosis

Question 36

Why does mitosis occur?

Answer 36

So each new daughter cell has nucleus with a complete set of chromosomes

Question 37

Chromosomes coil up

Answer 37

prophase

Question 38

Nuclear envelope disappears

Answer 38

prophase

Question 39

Spindle fibers form

Answer 39

prophase

Question 40

Chromosomes line up in middle of cell

Answer 40

metaphase

Question 41

Spindle fibers connect to chromosomes

Answer 41

metaphase

Question 42

Chromosome copies divide

Answer 42

anaphase

Question 43

Spindle fibers pull chromosomes to opposite poles

Answer 43

anaphase

Question 44

Chromosomes uncoil

Answer 44

telophase

Question 45

Nuclear envelopes form

Answer 45

telophase

Question 46

2 new nuclei are formed

Answer 46

telophase

Question 47

Spindle fibers disappear

Answer 47

telophase

Question 48

_____ — the division of the rest of the cell (cytoplasm and organelles) after the nucleus divides

Answer 48

Cytokinesis

Question 49

In animal cells the cytoplasm pinches in, _____ form.

Answer 49

cleavage furrow

Question 50

In plant cells a _____ forms

Answer 50

cell plate

Question 51

After mitosis and cytokinesis, the cell returns to ______ to continue to grow and perform regular cell activities

Answer 51

Interphase

Question 52

•____ controls all cell activities including cell division

Answer 52

DNA

Question 53

•Some cells lose their ability to control their rate of cell division – the DNA of these cells has become damaged or changed

Answer 53

mutation

Question 54

•These super-dividing cells form masses called ____

Answer 54

tumors

Question 55

____ tumors are not cancerous – these cells do not spread to other parts of the body

Answer 55

Benign

Question 56

•_____ tumors are cancerous – these cells break loose and can invade and destroy healthy tissue in other parts of the body (called metastasis)

Answer 56

Malignant

Question 57

these cells break loose and can invade and destroy healthy tissue in other parts of the body

Answer 57

matastasis