- I. Chromosomes cluster at opposite spindle poles and their identity is lost as discrete elements.
II. Nuclear envelope assembles around the chromosome clusters.
III. Nucleolus, Golgi complex and ER reform.
Above features indicates which phase of mitosis.- Anaphase
- Telophase
- Cytokinesis
- S-phase
- Mitosis is divided into
- five stages
- three stages
- four stages
- six stages
- In which stage of cell cycle initiation of condensation of chromosome takes place?
- Anaphase
- Metaphase
- Telophase
- Prophase
- The complete disintegration of nuclear envelope in
- start of prophase of mitosis
- start of metaphase of mitosis
- end of anaphase of mitosis
- start of telophase of mitosis
- In a cell cycle, which structures serves as the site of attachment of spindle fibres?
- Chromosome
- Histone
- Chromonemeta
- Kinetochore
- The plane of alignment of chromosome at the metaphase stage of cell cycle is referred to as the
- prophase plate
- metaphase plate
- anaphase plate
- telophase plate
- Given diagram indicates which of the following:-
- Interphase
- Prophase
- Metaphase
- Anaphase
- Chromosome reaches their respective poles which of the following stages of mitosis?
- Cytokinesis
- Interphase
- S-phase
- Telophase
- Statement I:- In animal cells, the cytokinesis achieved by the appearance of a furrow in plasma membrane.
Statement II:- In plant cells, the formation of t' new cell wall begins with the formation of sim precursor called cell plate.
Choose the correct option- Both statements are incorrect
- Both statements are correct
- Statement I is correct, but II is incorrect
- Statement II is correct, but I is incorrect
- Mitosis or the equational division is usually restricted to ...A... cells. However, in some low plants and in some social insects ...B... cells also divide by mitosis.
Choose the correct option for A and B from the given options.- A - haploid , B - diploid
- A - haploid , B - haploid
- A - diploid , B - diploid
- A - diploid , B - haploid
- Mitosis usually results in the
- production of diploid daughter cells
- growth of multicellular organisms
- cell repair
- All of the above
- Assertion (A) Mitosis is often called indirect division.
Reason (R) Mitosis divides a parent cell into two daughter cells.- Both A and R are true and R is the correct explanation of A
- Both A and R are true, but R is not the correct explanation of A
- A is true, but R is false
- Both A and R are false
- Karyokinesis refers to the division of
- the cytoplasm
- the nucleus
- cytoplasm and nucleus
- all constituents of the cell
- The division of the cytoplasm is termed as
- karyokinesis
- mitosis
- cytokinesis
- meiosis
- Select the correct option
- Division of the cytoplasm occurs before the division of the nucleus
- Division of the nucleus occurs before the division of the cytoplasm
- Both the division of the nucleus and cytoplasm occurs at the same time
- None of these
- Which of the following statements are correct for multicellular cell division?
I. Cell division brings about embryonic development and growth.
II. It plays a role in repair and maintenance of the body.
III. It is important for reproduction.
The correct option is:-- Only I
- I and III
- Only II
- I, II and III
- What is the average duration for mitosis?
- 3 min 30 min
- 3 hr to 5 hr
- 30 min to 3 hr
- 2hr to3hr
- Which of the following stage of mitosis follows the S and G2-phases of interphase?
- Prophase
- Metaphase
- Anaphase
- Telophase
- The nucleus becomes spheroidal in ------------- of the mitosis.
Fill in the blank with an appropriate option.- early prophase
- middle prophase
- late prophase
- metaphase
- Mitosis is characterised by
- reduction division
- equal division
- Both (reduction division) and (equal division)
- Absence of spindle formation
- In which of the following stage of the cell cycle, the attachment of spindle fibres to kinetochores of chromosomes occurs?
- Prophase
- Metaphase
- Anaphase
- Telophase
- 'XX' is a phase of mitosis, in which the chromatin condenses into discrete chromosomes. During 'XX' phase, nuclear envelope breaks down and spindles forms at opposite ends of the cell.
Identify 'XX'.- Interphase
- Anaphase
- Telophase
- Prophase
- Which stages of mitosis is known for occurrence of cytokinesis?
- Metaphase
- Telophase
- Anaphase
- None of these
- Which of the following statements (events) is/are true for mitotic telophase?
- Nucleolus, GB and ER form
- NM assembles around each chromosomes clusters
- Arrival of chromosomes cluster at opposite poles and loss of their identity as discrete elements
- All of the above
- Identify A-C in the given statements, and choose the correct option.
I. Spindle microtubules that extend from the two poles of a dividing cell are called .. .A... .
II. A centromere connects two identical copies of a single chromosome. These two copies are called ...B... .
III. In 'X' phase, the paired chromosomes separate and begin moving to opposite ends of the cell. This 'X'is called ...C... .- A-kinetochore fibres; B-chromatids; C-metaphase
- A-polar fibres; B-homologous chromosomes; C-Prophase
- A-polar fibres; B-sister chromatids; C-anaphase
- A-kinetochore fibres; B-asters; C-anaphase
- Choose the correct sequence of two main events in mitosis.
- Karyokinesis followed by cytokinesis
- Cytokinesis followed by karyokinesis
- Karyokinesis followed by separation of the daughter cells
- Cytokinesis followed by separation of the daughter cells
- See the diagrams carefully and identify the different stages of mitosis (A-C) by choosing appropriate options given below.
- A-Metaphase; B-Telophase: C-lnterphase
- A-Telophase; B-Metaphase; C-Prophase
- A-Anaphase; B-Telophase; C-lnterphase
- A-Telophase; B-Anaphase; C-Prophase
- Mitosis was discovered by ...A... in the plant cells and by ...B... in animal cells.
Fill the blanks (A and B) to complete the given statement.- A-Strasburger; B-Flemming
- A-Remak; B-Strasburger
- A-Remak; B-Flemming
- A-Flemming; B-Strasburger
- In the process of mitotic division during interphase, chromosome material remains in the form of very loosely coiled threads called
- chromosome
- chromatin
- chromatid
- microtubules
- Choose the correct answer for the statements given below.
I. Protein involved in the shortening and thickening of chromosome fibres.
II. The name of early prophase when elongated chromosomes occur in overlapped condition like a ball of wool without their ends being visible.
III. Each group of astral rays along with its centriole pair.
IV.Name the narrow point which is responsible for attaching two sister chromatids to each other.- l-Condensins, II—Aster, Ill-Spirme stage, IV-Kinetochore
- l-Condensins, II—Aster, Ill-Spirme stage, IV-Centromere
- l-Condensins, ll-Spirme stage, Ill-Aster, IV-Centromere
- l-Tubulins, ll-Spirme stage, lll-Amphiaster, IV-Kinetochore
- Choose the correct combination of options to select the correct statement for prophase.
I. Chromosomal material condenses to form compact mitotic chromosomes.
II. The assembly of mitotic spindle is initiated by the microtubules.
III.Cells do not show organelles when viewed under the prophase.
IV.The nucleolus or nucleoli degenerate completely.- I Only
- II and III
- I and II
- All of these
- After the separation of centromeres during mitosis,the chromatids move towards opposite poles of the spindle. Name the term used for these chromatids.
- Daughter chromosomes
- Kinetochores
- Half spindles
- Centrosomes
- See the diagram carefully and sequentially arrange the steps of amitosis given below.
I. The constriction appears in the cytoplasm.
II. The nucleus of cell elongates and develops a constriction round its middle.
III.The constriction in nucleus gradually deeper and finally cuts the nucleus into two daughter nuclei.
IV.The cytoplasmic constriction divides the parer cell into two daughter cells, each with a nucleus
Option containing correct sequence of events is:-- l → lll → ll → IV
- l → II → llI → IV
- lI → l → lIl → IV
- Il → lll → l → IV
- An egg cell has 5 picogram of DNA in its nucleus How much amount of DNA will be present in the animal, at the end of G2-phase of mitosis?
- 2-5 picogram
- 5 picogram
- 5 picagram
- 20 picogram
- What type of cell division takes place in the functional megaspore initially in angiosperms?
- Haemotypic without cytokinesis
- Reductional without cytokinesis
- Somatic followed by cytokinesis
- Meiotic followed by cytokinesis
- The spindles are formed of:-
- chromosome
- actin
- microtubules
- myosin
- What is not seen during mitosis in somatic cells?
- Spindle fibres
- Chromosome movement
- Disappearance of nucleolus
- Synapsis
- Mitosis is a process by which eukaryotic cells
- grow
- get specialised in structure
- multiply
- expose the genes
- The morphology of chromosomes can be studied most easily in:-
- prophase
- metaphase
- anaphase
- telophase
- The term, mitosis was coined by
- Flemming
- Strasburger
- Remak
- Moore
- Which type of cell division helps in regeneration of cells?
- Mitosis
- Amitosis
- Meiosis
- Karyokinesis
- Assertion (A) Mitosis is significant in the life of an organism, especially in the growth of multicellular organism.
Reason (R) Mitosis restores the nucleo-cytoplasmic ratio.- Both A and R are true and R is the correct explanation of A
- Both A and R are true, but R is not the correct explanation of A.
- A is true, but R is false
- Both A and R are false
- Match the following columns.
Column A(organism) Column B(meiocyte) A Chromosomes in matching pairs 1 metaphase plate B In mitosis, each chromosome is copied
and2 homologous
C Precursor for cell wall ormation that
represents the middle
lamella between the
walls of two adjacent
cells is called3 cell plate D The plane of alignment of the chromosomes at metaphase is referred to
as the4 cell divides to give two daughter cells
- A - 2, B - 4, C - 3, D - 1
- A - 1, B - 4, C - 2, D - 3
- A - 4, B - 3, C - 1, D - 2
- A - 3, B - 2, C - 4, D - 1
- A root cell undergoes division and produces 512 cell. Find the number of cell division
- 6
- 7
- 8
- 9
- A leaf cell undergoes division and produces 256 cell. Find the rate of cell division ?
- 255
- 258
- 8
- 7
- There are 100 seed formed by fertilization of microspore and megaspore. Find the number of cell division to produce 100 seed.
- 25
- 4
- 125
- 200
- Asexual reproduction of some protistans and monerans is by:-
- mitosis
- amitosis
- meosis
- none of these
- Each chromosome has a distinct morphology with regard to:-
- relative arm length and position of centromere
- relatice length of chromosome but centro-mere position has no meaning
- the number of active genes present there
- centromere position but length of chromosomes has no meaning
- During mitotic metaphase the position of centromere is
- towards the equator
- anywhere in the spindle
- variable from plant to plant
- poleward
- Which of the following statements is true?
- the daughter cell receives two maternal and one paternal chromosomes
- the daughter cell receives both maternal and paternal chromosomes of the homologous pair
- the daughter cells receives only maternal or paternal chromosomes of the non homologous pair
- all of these