CELL DIVISION AND CHROMOSOMES

Question 1

Give 3 examples of cells that don’t divide once they are mature

Answer 1

Neurons, muscle cells and RBCs

Question 2

….. and ….. undergo continuous division throughout a lifetime

Answer 2

Epithelial cells and bone marrow cells.

Question 3

A series of event which precede cell division is called

Answer 3

Cell cycle

Question 4

The cell cycle consists of the….. phases

Answer 4

The G1 phase, S phase and G2 phase

Question 5

What occurs in the G1 phase

Answer 5

Synthesis of proteins and macromolecules

Question 6

The period of growth involving protein synthesis is called

Answer 6

The G1 phase

Question 7

DNA synthesis occurs in the ….

Answer 7

S phase

Question 8

What stage involves the replication of each chromosome

Answer 8

The S phase

Question 9

What happens in the G2 phase

Answer 9

Increase in protein synthesis and preparation for cell division

Question 10

The cell checks the chromosomes for errors and makes needed repairs during the……

Answer 10

G2 phase

Question 11

Mitotic cell division occur during which processes? Name six

Answer 11

Embryonic development
Cell replacement
Cell regeneration
Growth
Asexual reproduction
Cancer or tumour formation

Question 12

Mitosis leads to the formation of ….. Daughter cells

Answer 12

Two

Question 13

During prophase, the main feature is the……, …… and….. of centrioles

Answer 13

Formation, duplication and migration

Question 14

A protein body formed during prophase is called

Answer 14

Kinetochore

Question 15

Kinetochores are formed at the

Answer 15

Centromere

Question 16

A large array of microtubules develop from the…… And are called …..

Answer 16

Centrosome, mitotic spindle

Question 17

The ends of the kinetichores are always attached to the …..

Answer 17

Poles

Question 18

Another name for interphase is

Answer 18

Resting stage

Question 19

Another name for interphase is

Answer 19

Resting stage

Question 20

In the metaphase, the chromosomes come to rest……

Answer 20

Midway between the poles

Question 21

The exact location where the chromosomes come to rest is called

Answer 21

Equatorial plane or metaphase plate

Question 22

Anaphase stage is always the stage of

Answer 22

Separation of chromatids and centromeres

Question 23

Pro metaphase stage is characterized by

Answer 23

The aggregation of chromosomes in a central position

Question 24

The first appearance of an organised spindle in plant and animal cells occur in

Answer 24

Pro-metaphase

Question 25

Nucleolus appear and chromosome uncoils during

Answer 25

Telophase

Question 26

The cells are at their respective poles at

Answer 26

Telophase

Question 27

The….. disintegrates and a……. Is formed around each new set of chromosomes at……

Answer 27

Spindle, new nuclear membrane at telophase

Question 28

The division of of cells into two is known as

Answer 28

Cytokinesis

Question 29

Cytokinesis in plants is by the formation of a …… At the centre which is later wrapped by a plasma membrane

Answer 29

Cell split

Question 30

In animals, cytokinesis takes the form of…..

Answer 30

Furrowing of cell walls

Question 31

Meiosis leads to the formation of…… daughter cells

Answer 31

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