QUESTION BANK 24.

The figure given below shows a certain stage of

1. What is the importance of meiosis? cell division with four chromosomes.
2. Which type of cell division occurs in somatic cells?
3. Where does meiosis occur in our body?
4. What do you mean by the cell cycle?
5. Expand DNA.
6. Why is meiosis referred to as a reduction division?
7. What is interphase?
8. Who discovered the chromosomes?
(a) Name the parts of the chromosome labeled A, B
9. Match the term meiosis with the most
and C. what is the function of Part C?
appropriate words given below:
(b) Name the type of division. Give a reason.
Iris, Insulin, Skin cell, Sperm
(c) Name the stage of division.
10. Gametes have a haploid number of
(d) What is the diploid number for the organism
chromosome. Give reason.
from which the cell is taken?
11. identify the stages of mitosis given below.
(e) Name the stage before and after as shown in
the diagram.
25. Look at the given diagram. They indicate the
three stages of cell division in a living cell.
12. Which type of reproduction brings about a Observe the diagrams and answer the following
change in the offspring? Why? questions:
13. State how does meiosis maintain the
chromosome number in a species.
14. How is variation produced in a species?
15. What are the changes that occur during S-
phase?
16. Mention few significant changes that occur in a
cell during interphase.
17. Differentiate between the following
(a) DNA and RNA (b) Chromosome and chromatid (a) Identify the cell division.
(c) Interphase and prophase (b) Define the type of cell division.
(d) S-phase and G2-phase (c) What is the significance of above cell division?
(e) Centrosome and centromere (d) Where does the above cell division take place?
18. Distinguish between the following on the basis (e) Is it a plant cell or an animal cell? Why?
of what is given in the brackets: 26. Look at the figure given below. On the basis of
(a) Karyokinesis and Cytokinesis (explain the terms) the diagram, answer the following questions.
(b) Mitosis and Meiosis (number of daughter cells (a) Identify the stage of the cell cycle as depicted
formed) by the cell.
19. How does cytokinesis occur in (a) animal cell (b) (b) Identify the two characteristics of this phase.
plant cell? (c) Describe the main events that take place when
20. Differentiate between mitosis in animal cell and the cell goes into the next stage.
plant cell.
21. Differentiate between mitosis and meiosis.
22. What happens during prophase of mitosis?
23. Name the biological term for the statements
given below:
(a) Division which brings about vegetative growth.
(b) The stage in mitosis when the nucleolus starts
disappearing. 27. The figure given below represents a stage during
(c) The shortest phase of mitosis. mitotic cell division in an animal cell.
 (e) Which is the cell division that results in half the
number of chromosomes in daughter cells?
31. Name the following:
The exchange of chromatid parts between the
maternal and the paternal chromatids of a pair
of homologous chromosomes during meiosis.
(a) Identify the stage. Give a reason so support 32. The given diagram shows a stage during mitotic
your answer. division in an animal cell:
(b) Name the parts labeled 1, 2 and 3.
(c) What is the chromosome number of the cell?
(d) Draw a neat labeled diagram of the cell as it
would appear in the next stage. Name the stage.
28. Choose the correct answer from each of the four
options given below”
(a) Identify the stage. Give a reason to support your
(i) Synthesis phase in the cell cycle is called so,
answer.
because of the synthesis of more
(b) Draw a neat, labeled diagram of the cell as it
(a) RNA (b) RNA and proteins
would appear in the next stage. Name the stage.
(c) DNA (d) Glucose
(c) In what two ways is mitotic division in an animal
(ii) Chromosomes get aligned at the centre of the
cell different from the mitotic division in a plant
cell during
cell?
(a) metaphase (b) Anaphase
(d) Name the type of cell division that occurs
(c) prophase (d) telophase
during:
(iii) The cell component visible only during cell
(i) Growth of a shoot (ii) Formation of pollen
division is
grains.
(a) mitochondria (b) chloroplast
33. The diagram given below represents a certain
(c) chromosome (d) chromatin
stage of mitosis:
29. Given below is a group of terms. The first pair
indicates the relationship between the two
terms. Rewrite and complete the second pair on
a similar basis.
Example : Oxygen : Inspiration : : Carbon dioxide :
Expiration Cytoplasm : Cytokinesis : : Nucleus :
(a) Identify the stage of cell division.
________
(b) Name the parts labeled A and B.
30. Study the diagram given below which
(c) What is the unique feature observed in this
represents as stage during the mitotic cell
stage?
division and answer the question that follow:
(d) How many daughter cells are formed from this
type of cell division?
34. Choose the correct answer from the options
given below:
After mitotic cell division, a female human cell
will have
(a) Identify the stage giving suitable reasons. (i) 44 + xx chromosome (ii) 44 + xy chromosome
(b) Name the parts numbered 1 and 2. (iii) 22 + x chromosome (iv) 22 + y chromosome
(c) What is the technical term for the division of (b) Give an example of nitrogenous base in DNA.
nucleus? 35. Given below is a diagram representing a stage
(d) Mention the stage that comes before the stage during mitotic cell division. Study it carefully and
shown in the diagram. Draw a neat labeled answer the questions that follow:
diagram of the stage mentioned.
 44. The diagram given below represents a stage
during cell division. Study the same and then
answer the questions that follow:

(a) Is it a plant cell or an animal cell? Give a reason

to support your answer.
(b) Identify the stage shown.
(c) Name the stage that follows the one shown
here. How is that stage identified? (a) Name the parts labeled 1, 2 and 3.
(d) How will you differentiate between mitosis and (b) Identify the above stage and give a reason to
meiosis on the basis of the chromosome support your answer.
number in the daughter cells? (c) Mention the site in the body where this type of
(e) Draw a duplicated chromosome and label its cell division occurs.
parts. (d) Name the stage prior to this stage and draw a
36. Given below is a set of five terms. Rewrite the diagram to represent the same.
terms in a logical sequence as directed at the 45. State whether the following statements are
end of the statement. true or false. If false. Rewrite the correct form of
An example has been done for you: cortical cell, the statement by changing the first or the last
root hair, xylem, soil water, endodermis word only.
(absorption of water by the plants) (a) Mitosis is the type of cell division occurring in
Karyokinesis, S-phase, Cytokinesis, G1-Phase, G2- the cells of injured parts of the body.
phase (cell cycle) (b) Chromosomes other than the pair of sex
37. answer the following questions: chromosomes are called alleles.
Write any four nitrogenous bases in a DNA 46. Given below is a diagram representing a stage
molecule. during mitotic cell division in an animal cell:
38. Briefly explain the following term:
Cytokinesis in plant cells.
39. Draw a well labeled diagram to show the
anaphase stage of mitosis in a plant cell having
four chromosomes.
40. Given below is a group of terms. Arrange and (a) Identify the above stage. Give a reason to
rewrite the terms in a correct order so as to be support your answer.
in a logical sequence. (b) Name the parts labeled 1, 2, 3 and 4.
Metaphase, telophase, prophase, anaphase, (c) What is the function of part -3?
cytokinesis (d) Name the stage that comes just after the stage
41. State of exact location of chromosomes. shown in the diagram. Draw a well labeled
42. Draw a well labeled diagram to show the diagram of this stage.
metaphase stage of mitosis in an animal cell 47. Name the type of cell division which occurs in
having four chromosome. the cells of the reproductive organs.
43. State whether the following statements are
true or false. If false, rewrite the correct form of
the statement by changing the first or the last
word only.
(a) Lysosome is a part of the cell in which
chromosomes are present.
(b) Centrosome is the organelle of the cell that
initiates cell division. 48. Given below is a diagram of a double helical
structure of DNA:
 54. State whether for following statement is true or
false. If false rewrite the correct form of the
statement by only changing the last word of the
statement.
Duplicated chromosomes remain attached at a
(a) Name the four nitrogenous bases that form a point termed centrosome.
DNA molecule.
(b) Give the full form of DNA. 55. (a) Draw a diagram of the nucleus of a cell
(c) Name the unit of heredity. having chromosome number 6, as it would
(d) Mention two points of difference between appear in the metaphase stage of mitosis and
Mitosis and Meiosis. label the following parts in the diagram:
49. State whether the following statement is true (i) Aster (ii) Achromatic spindle (iii) Chromatid
or false. If false, rewrite the correct statement (iv) Centromere
by changing the first or the last word only. (b) Mention the difference between mitosis and
The resting stage in mitosis is called interphase. meiosis with reference to:
50. The diagram below represents a stage in cell (i) number of daughter cells formed at the end of
division. Study the same and answer the the division.
questions that follow: (ii) the chromosome number of the daughter cells
formed.

(a) Identify the stage of cell division.

(b) Name the parts labeled A, B and D.
(c) What is the unique feature observed in this
stage?
(d) Where does this type of cell division usually
occur?
(e) How many daughter cells are formed from this
type of cell division?
(f) Is the dividing cell shown, a plant or an animal
cell? Give a reason to support your answer.
51. Identify and name the following process / term
from the statement given below.
Chromosomes appear thread – like.
52. Name the process / term for the statements
given below:
(a) A membrane that disappears during later
prophase.
(b) A specific part of a chromosome that
determines hereditary characteristics.
53. Given below is a set of five terms. Without
changing the first term, rearrange the remaining
four, so as to be in a logical sequence as per the
direction given in bracket.
Interphase, Anaphase, Prophase, Telophase,
Metaphase (sequential stages in Karyokinesis)