Mitosis

Question 1

cycle of duplication and division.

Answer 1

Cell cycle

Question 2

is a finely controlled process that results in the distribution of identical heredity material –DNA–to the daughter cells.

Answer 2

cell cycle

Question 3

reasons why cell undergo cell division

Answer 3

-reproduction of the entire organism (unicellular organisms)
-growth and development, and
-tissue repair (multicellular organisms)

Question 4

A cell reproduces by undergoing a coordinated sequence of events in which it duplicates its contents and then divides in two.

Answer 4

Mitosis

Question 5

Sequential steps in cell division

Answer 5

-nuclear division(mitosis)
-cytoplasmic division(cytokinesis)

Question 6

nuclear division

Answer 6

Mitosis

Question 7

cytoplasmic division

Answer 7

Cytokinesis

Question 8

the sister chromatids are pulled apart, resulting in segregation of two sets of chromosomes, one set at each end of the cell.

Answer 8

mitosis

Question 9

the cytoplasm is divided, and two separate daughter cells are formed, each containing a single nucleus with one set of chromosomes.

Answer 9

cytokinesis

Question 10

In plant cells, cytokinesis occurs by __________ across the parent cell’s midline.

Answer 10

cell plate formation

Question 11

parent cell’s midline

Answer 11

old metaphase plate

Question 12

Most of the life of a cell is spent in a non-dividing phase called _______.

Answer 12

Interphase

Question 13

Phases in the Interphase

Answer 13

-first gap phase(G1)
-Synthesis (S) phase
-second gap phase (G2)

Question 14

Which the newly divided cells grow

Answer 14

first gap phase (G1)

Question 15

which the number of chromosomes is doubled and appear as chromatin.

Answer 15

Synthesis (S) phase

Question 16

where the cell makes the enzymes and other cellular materials needed for mitosis.

Answer 16

second gap phase (G2)

Question 17

Four stages of mitosis

Answer 17

-Prophase
-Metaphase
-Anaphase
-Telophase

Question 18

formula for computing the average number of cell

Answer 18

𝑨𝒗𝒆𝒓𝒂𝒈𝒆 𝒏𝒖𝒎𝒃𝒆𝒓 𝒐𝒇 𝒄𝒆𝒍𝒍𝒔 =
𝑹𝟏 + 𝑹𝟐 over 2

Question 19

formula for computing the percentage of time the cell spend in mitosis.

Answer 19

𝑷𝒆𝒓𝒄𝒆𝒏𝒕𝒂𝒈𝒆 𝒐𝒇 𝑺𝒕𝒂𝒈𝒆 𝒐𝒇 𝑴𝒊𝒕𝒐𝒔𝒊𝒔
= (𝑻𝒐𝒕𝒂𝒍 𝑨𝒗𝒆𝒓𝒂𝒈𝒆 𝒂𝒗𝒆𝒓𝒂𝒈𝒆 𝒏𝒖𝒎𝒃𝒆𝒓 /𝒏𝒖𝒎𝒃𝒆𝒓 𝒐𝒇 𝒄𝒆𝒍𝒍𝒔 𝒐𝒇 𝒄𝒆𝒍𝒍𝒔) × 𝟏𝟎𝟎

Question 20

meristematic growth or zone

Answer 20

above the root cap

Question 21

-the chromosomes that are held together by two sister
chromatids are condensed at the centromere during this stage.
-at this stage the nuclear envelope breaks down, hence the contents of the nucleus burst
out of its case and go to the cytoplasm.

Answer 21

prophase

Question 22

the spindle fibers align the
chromosomes along the middle of the cell nucleus.

Answer 22

Metaphase

Question 23

center line of the metaphase stage

Answer 23

metaphase plate

Question 24

the sister chromatids have
already separated from each other then form as a new chromosome and then move to the opposite poles
of the cell.

Answer 24

anaphase

Question 25

Chromosomes have reached opposite poles of the cell. Spindle fibers disappear. Nuclear membrane forms around the chromosome clusters. Chromosomes disappear from view as DNA re-extends, and nucleoli appear.

Answer 25

Telophase

Question 26

cell divides into two daughter cells

Answer 26

Cytokinesis

Question 27

visible structures in the Interphase stage

Answer 27

the nucleolus and the nuclear envelope.

Question 28

the nuclear envelope is not visible and the chromatids become visible which looks like a black lump of mass in the middle in a circular shape.

Answer 28

Prophase stage

Question 29

fibers attach to the kinetochore looking like a lump of wires attached to the middle.

Answer 29

Metaphase stage

Question 30

the visible structures are still the sister chromatids. However, by this stage, they are at the opposite poles of the cell.

Answer 30

Anaphase stage

Question 31

the visible structure seen is the forming of a new cell membrane. They are seen as two cells with two nuclei however they still are connected.

Answer 31

Telophase and Cytokinesis