Mitosis

Question 1

Before cell division, cell must copy its content and genome to double.True or False?

Answer 1

True

Question 2

Chromatin are condensed into chromosomes during cell division.True or False?

Answer 2

False

Question 3

Degree of condensation is the same for different stages of cell division.True or False?

Answer 3

False
degree of condensation is vary

Question 4

Every eukaryotic species have _____ number of chromosomes.

Answer 4

different
eg.human-46 chrosomes

Question 5

Human cells can be divided into ____ & ____ according to number of chromosomes.

Answer 5

Somatic cells
Reproductive(germ) cells

Question 6

Somatic cells are_____ cells and divided by _____.

Answer 6

Diploid(2n)
Mitosis

Question 7

Germ cells are_____ cells and divided by _____.

Answer 7

Haploid(n)
Meiosis

Question 8

Germ cells are found only in_____.

Answer 8

Gonads
Testes in male & Ovary in female

Question 9

Human somatic cell contain_____ chromosomes.

Answer 9

46 chromosomes

Question 10

Human germ cell contain_____ chromosomes.

Answer 10

23 chromosomes

Question 11

Diploid

Answer 11

23 chromosomes from maternal
23 chromosomes from paternal

Question 12

What are germ cells?

Answer 12

Specilized reproductive cell that give rise to gamates

Sperm cell in male & Ovum in females

Question 13

Which cell can pass the genetic information to next generation?

Answer 13

Germ cells

Question 14

During cell division,chromosome are duplicated into _____.

Answer 14

Identical sister chromatids

Question 15

Cell cycle can be divided into_____ & ______.

Answer 15

Interphase
Mitotic phase

Question 16

Cell spend 90% of its time in _____.

Answer 16

Interphase (90% of the time)

Question 17

Duration of interphase

Answer 17

24 hours

Question 18

Interphase can be divided into 3 phases._____,______ & _____.

Answer 18

G1 phase (First gap)
S phase (Synthesis)
G2 phase (Second gap)

Question 19

Mitosis can be divided into 5 stages.What are they?

Answer 19

Prophase
Prometaphase
Metaphase
Anaphase
Telophase

Question 20

G1 phase

Answer 20

Cell growth
Duplication of cell organelles

Question 21

S phase

Answer 21

DNA replication

Question 22

G2

Answer 22

Replication of centrosomes in animal cells

Question 23

Chromosomes are more condensed in G2 phase.True or False

Answer 23

False
In G2 chromosomes are duplicated but less condended

Question 24

Prophase

Answer 24

1)Nucleolus disappear
2)Chromatin are condensed into chromosomes (Sister chromatid)
3) Movement of centrosomes to the opposite of the cell
4) Growth of mitotic spindle and aster

Question 25

Sister chromatids are attached to each other by ______ proteins

Answer 25

Cohesion proteins

Question 26

Center of chrmosome arms is called ______.

Answer 26

Centromere

Question 27

Prometaphase

Answer 27

1)Fragmentation of nuclear envelope 2)Chromosomes are more condensed 3)Developement of kinetochore proteins in centromere 4)Attachement of mitotic spindle to kinetochores

Question 28

There are ______ kinetochores in duplicated chromosomes.

Answer 28

2

Question 29

Kinatochore microtubules

Answer 29

Microtubules that attached to the kinetochores of the sister chromatids

Question 30

Function of nonkinetochore microtubules

Answer 30

Elongation of the cell

Question 31

Metaphase

Answer 31

1) Arrangement of chromosome at the metaphase plate 2)Centrosome are at completely at the opposite pole 3)Microtubules of asters are grown & connected to plasma membrane

Question 32

Anaphase

Answer 32

1) Seperation of sister chromatids by separase proteins 2) Disintegration of mitotic spindle

Question 33

Chromosomes are arranged _____ in the metaphase plate

Answer 33

Horizontally

Question 34

Shortest phase in cell cycle

Answer 34

Anaphase

Question 35

Telophase

Answer 35

1) Development of nuclear envelope & Nucleolus 2) Chromosomes are decondesed into chromatin 3) Depolymarization of mitotic spindle

Question 36

Cytokinesis

Answer 36

Division of cytoplasm Cleavage furrow in animal cells

Question 37

Mitosis of single celled organisms result in

Answer 37

Asexual reproduction

Question 38

Human cell can undergo one cell division in _____.

Answer 38

24 hour M Phase-less than an hour S phase-10-12hr G2 phase-4 to 6hr G1 phase-5 to 6 hr

Question 39

Types of cell according to cell division

Answer 39

Labile cell(proliferative cells) Stable cell Permanent cells(amitotic cells)

Question 40

Labile cells are

Answer 40

Epithelium of skin,GI & uninary tract Hematopoietic stem cells in bone marrow

Question 41

Stable cell

Answer 41

Hapatocytes of liver Epithelium of kidney tubules *divide when require

Question 42

Permanent cell or amitotic cell are

Answer 42

Neurons Skeletal muscle Cardiac muscle

Question 43

Function of mitosis

Answer 43

Asexual reproduction in single celled organisms Growth & development Repair

Question 44

G1 phase

Answer 44

Also growth phase -Cell growth & organelles increase -Synthesis of protein & enzymes -Normal metabolic activities

Question 45

S phase

Answer 45

-DNA replication -Replication of centrosome

Question 46

G2 phase

Answer 46

-Repair and check for duplicated DNA -Prepare for mitosis

Question 47

Cleavage furrow is

Answer 47

a contractile ring of actin & myosin

Question 48

Cell division in prokaryotes

Answer 48

Binary fission (Duplicate 2 identical daughter cells)

Question 49

Both prokaryotes & unicellular eukaryotes undergoes binary fission.True or False?

Answer 49

True Unicellular eukaryotes can also undergo mitosis.

Question 50

Bacteria can exchange theire plasmid DNA with other bacteria.True or False?

Answer 50

True called horizontal gene transfer Antibiotic resistance develop due to the horizontal gene transfer of bacteria