Significance of Mitosis

Q.

What will be the total number of mitotic divisions in the formation of 64 daughter cells?

1. 6
2. 32
3. 63
4. 16

Q.

Why is mitosis called equational division?

Q.

A single cell gives rise to 32 cells by dividing mitotically. How many times has it undergone mitosis division?

1. 16

2. 8

3. 4

4. 5

Q.

What are the two main functions of mitosis?

Q.

1. what do you mean "in vitro" ? specifically on sentences"Cell division occurs in certain tissues to replace lost cells.Unicellular organisms grow by cell division .One can easily observe this in IN VITRO cultures by simply counting the number of cells under microscope".

And on sentence "Metabolism is a defining feature of all living organisms without exception , isolated metabolic reactions IN VITRO are not living things but surely living reactions."

Q. Match the columns I and II, and choose the correct combination from the options given.

Column I	Column II
a. Muscular dystrophy	1. Age-related disorder
b. Myasthenia gravis	2. Auto immune disorder
c. Osteoporosis	3. Genetic disorder
d. Tetany	4. Wild contraction
e. Gout	5. Inflammation of joints

Q.

What happens during Anaphase?

Q.

Why is mitosis called equational division?

Q. Mitosis does not

1. help in cell repair
2. help in growth
3. produce 4 daughter cells
4. help in formation of gametes in bryophytes

Q.

How many mitotic divisions are needed for a single cell to make 128 cells?

1. 7

2. 14

3. 28

4. 6

Q. Given below are some processes which involve mitosis or meiosis. Categorise them and select the correct option.
1. Variations
2. Maintenance of chromosome number in diploid organisms
3. Formation of gametes
4. Evidence of basic relationship among all organisms
5. Growth and repair
6. Cancer

1. Mitosis	Meiosis
   1 and 2	3, 4, 5 and 6

2. Mitosis	Meiosis
   4, 5 and 6	1, 2 and 3

3. Mitosis	Meiosis
   4 and 5	1, 2, 3 and 6

4. Mitosis	Meiosis
   1, 2 and 6	3, 4 and 5

Q.

Name any two sites in plants where mitotic divisions occur.

Q. Assertion :The final stage of meiotic prophase I is diplotene. Reason: Diplotene is marked by terminalisation of chiasmata.

1. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
2. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
3. Assertion is correct but Reason is incorrect
4. Both Assertion and Reason are incorrect

Q.

Mitosis is called equational division because

1. both parent cell and daughter cell have the same number of chromosomes.

2. parent cell gives rise to 2 daughter cells.

3. it occurs in all somatic cells.

4. the chromosomes line themselves on the equatorial plane.
   

Q. Mitosis occurs in

1. Haploid individuals
2. Diploid individuals
3. Both (A) and (B)
4. In bacteria only

Q. Assertion: Mitosis maintains the genetic similarity of somatic cells.
Reason: Chromosomes do not undergo crossing over.

1. Both assertion and reason are true and the reason is the correct explanation for the assertion.
2. Both the reason and assertion are true but the reason is not the correct explanation for the assertion
3. Assertion is true but reason is false
4. Both the reason and assertion are false

Q. Give a schematic representation of oogenesis in humans. Mention the number of chromosomes at each stage. Correlate the life phases of the individual with the stages of the process.

Q. Diploid living organism develops from zygote by repeated cell divisions called as

1. Meiosis
2. Amitosis
3. Mitosis
4. Segmentation

Q.

Why is mitosis called equational division?

Q. A cell with chromosome number 16 is undergoing meiotic cell division. What will be the number of chromosomes in daughter cells formed? Give reason.​
​

Q.

Mitosis is called equational division because

1. it occurs in all somatic cells.

2. the chromosomes line themselves on the equatorial plane.
   

3. both parent cell and daughter cell have the same number of chromosomes.

4. parent cell gives rise to 2 daughter cells.

Q. A cell with 54 chromosomes, will have 108 chromosomes during which of the following stage?
I. Anaphase
II. Metaphase
III. Prophase
IV. Telophase

1. I and IV
2. II and III
3. II and IV
4. I, II and III
5. I, II and IV

Q. Which of the following characteristics of mitosis is NOT correct?

1. 
   Mitosis occurs in somatic cells
2. 2N----->2N
3. 2N----->N
4. 
   Mitosis is important for growth and repair of multicellular organisms