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Cell Cycle and Cell Division Class 11 MCQs Questions with Answers
Solving the Cell Cycle and Cell Division Multiple Choice Questions of Class 11 Biology Chapter 10 MCQ can be of extreme help as you will be aware of all the concepts. These MCQ Questions on Cell Cycle and Cell Division Class 11 with answers pave for a quick revision of the Chapter thereby helping you to enhance subject knowledge. Have a glance at the MCQ of Chapter 10 Biology Class 11 and cross-check your answers during preparation.
I. Select the correct answer from the following Questions:
Question 1.
Life starts from a single cell in plants and animals called
(a) Cell
(b) Zygote
(c) Tissue
(d) Growth
Answer
Answer: (b) zygote
Question 2.
A typical eukaryotic cell cycle is illustrated by human cells in culture, which divide approximately every:
(a) 12 hours
(b) 10 hours
(c) 24 hours
(d) 6 hours
Answer
Answer: (c) 24 hours
Question 3.
Yeast cell can progress through all the four stages of the cell cycle in only about:
(a) 60 minutes
(b) 90 minutes
(c) 30 minutes
(d) 45 minutes.
Answer
Answer: (b) 90 minutes.
Question 4.
The interphase is divided into.
(a) G1 phase (Gap1)
(b) S phase (Synthesis)
(c) G2 phase (Gap2)
(d) ail of these stages.
Answer
Answer: (d) All of these stages.
Question 5.
The S phase marks the period during which replication of DNA takes place. It is during this time that the content of DNA doubles, from
(a) 2C to 4C
(b) 4C to 2C
(c) (1n or 2n)
(d) (2n or 1n)
Answer
Answer: (a) 2C to 4C.
Question 6.
The centrioles, in animal cells, initiate their replication in the cytoplasm during.
(a) G1 phase
(b) G2 phase
(c) S phase
(d) None of these phases.
Answer
Answer: (b) G2 phase.
Question 7.
In plants apical cells and the cambium tissue continue to divide all their life, they are called.
(a) Meristemic tissue
(b) cambium tissue
(c) equational division
(d) syneytium
Answer
Answer: (a) Meristemic tissue.
Question 8.
Mitosis is divided into
(a) Prophase
(b) Metaphase
(c) Anaphase
(d) Telophase
(e) All of these phases.
Answer
Answer: (e) All of these phases.
Question 9.
The small disc shaped structure at the surface of centromeres is called.
(a) Kinetochores
(b) sister chromatids
(c) microtubule
(d) Golgi complex
Answer
Answer: (a) Kinetochores.
Question 10.
Mitosis accomplishes the segregation of duplicated chromosomes into daughter nuclei (karyokinesis), but the cell itself is divided into two daughter cells by a separate process called.
(a) Cytokinesis
(b) Karyokinesis
(c) Nucleolous
(d) Chromosome clusters.
Answer
Answer: (a) Cytokinesis
Question 11.
In some organisms karyokinesis is not followed by cytokinesis as a result of which multinucleate condition arises which is called:
(a) Syncytium
(b) Meiosis I
(c) Cell-plate
(d) Meiosis II
Answer
Answer: (a) Syncytium.
Question 12.
The cells having more than two complete sets of chromosomes are called
(a) Diploid
(b) Haploid
(c) Polyhybrid
(d) Polyploid.
Answer
Answer: (d) Polyploid.
Question 13.
In Meiosis, the chromatids separate during
(a) Metaphase I
(b) Anaphase I
(c) Anaphase II
(d) Metaphase II
Answer
Answer: (c) Anaphase II.
Question 14.
In the meiotic cell division four daughter ceils are produced by two successive division in which
(a) First division is reductional and second is equationai.
(b) First division is equationai, second is reductional.
(c) Both division are equationai.
(d) Both division are reductional.
Answer
Answer: (a) First division is reductional and second is equationai.
Question 15.
Meosis is
(a) Reductional division
(b) Equationai division
(c) Multiplicational division
(d) Disjunctional division.
Answer
Answer: (a) Reductional division.
Question 16.
The term meiosis was coined by
(a) Blackman
(b) Flemming
(c) Robertson
(d) Former and Moore.
Answer
Answer: (d) Former and Moore.
Question 17.
Chromosomes counting is best done during
(a) Metaphase
(b) Telophase
(c) Late prophase
(d) Late anaphase.
Answer
Answer: (a) Metaphase.
Question 18.
Meisosis II bring about
(a) Sepration of chromatids
(b) Separation of homologous chromosomes.
(c) Synthesis of DNA and centromere
(d) Separation of sex chromosomes.
Answer
Answer: (a) Sepration of chromatids
Question 19.
In which stage the chromosomes appear as thin long thread?
(a) Leptotene
(b) Zygotene
(c) Prophase
(d) Pachytene.
Answer
Answer: (a) Leptotene.
Question 20.
Anastral mitosis is found in
(a) All living organisms
(b) Lower animals.
(c) Higher plants
(d) Higher animals.
Answer
Answer: (c) Higher plants.
II. Fill in the blanks:
Question 1.
Meiosis ends with telophase II, in which the …………… are once again enclosed by a nuclear envelope, cytokinesis follows, resulting in the formation of tetrad of cells i.e., four haploid ……………
Answer
Answer: chromosomes, daughter cells
Question 2.
Anaphase begins with the simultaneous splitting of the ………….. which hold the sister chromatids together, allowing them to move toward …………….
Answer
Answer: centromeres, opposite poles of the cell
Question 3.
Metaphase II the chromosomes align on the equator with micro¬tubules from opposite poles of the spindle get attached to the …………. of sister chromatids.
Answer
Answer: kinetochores
Question 4.
Prophase II meiosis II initiates immediately after ………….. usually before the …………. have fully elongated.
Answer
Answer: cytokinesis, chromosomes
Question 5.
The stage between the two meiotic divisions is called ………….. and is generally short lived.
Answer
Answer: interkinesis
Question 6.
Diplotene X-shaped structures are called ……………
Answer
Answer: chsiamata
Question 7.
The complex formed by a pair of synapsed homologous chromosomes is called a …………. or a tetrad.
Answer
Answer: bivalent
Question 8.
Zygotene is the second stage of prophase I during which certain chromosomes start pairing together and this process of association is called ……………
Answer
Answer: synapsis
Question 9.
Meiosis involves two sequential cycles of nuclear and cell division, called ………… and ………….. but only a single cycle of DNA replication.
Answer
Answer: meiosis I, Meiosis II
Question 10.
M phase is the most dramatic period of the cell cycle, involing a major recoganization of virtually all cell components. Since the chromosome number (ploidy) of parent and progeny cell is the same it is also called as ………….
Answer
Answer: equational division
III. Mark the statement true (T) or false (F)
Question 1.
All organisms, even the largest, start their life from a single cell.
Answer
Answer: True.
Question 2.
Growth and reproduction are characteristic of cells, indeed of all living organisms.
Answer
Answer: True.
Question 3.
Cell division is a very important process in all organisms.
Answer
Answer: True.
Question 4.
The requence of events by which a cell duplicates its genome, synthesies the other constituent of the cell and eventually divides into two daughter cells is termed cell cycle.
Answer
Answer: True.
Question 5.
Yeast for example, can progress through the cell cycle in only about 24 hours.
Answer
Answer: False.
Question 6.
The cell cycle is divided into two basic phases:
(1) M phase (mitosis phase)
(2) Interphase.
Answer
Answer: True.
Question 7.
The 24 hour overage duration of cell cycle of a human cell, cell division proper lasts only about an hour. Hence, 95% of the progression of cell cycle is spent in interphase the period between two successive mitosis or cell division.
Answer
Answer: True.
Question 8.
Interphase though called resting phase, is the time during which the cell is preparing for division by undergoing both cell growth and DNA replication in an orderly manner.
Answer
Answer: True.
Question 9.
Prophase which is the second stage of mitosis follows the S and G2 phases of interphase.
Answer
Answer: False.
Question 10.
In an animal cell this is achieved by the appearance of a furrow in the plasma membrane. The furrow gradually deepens and ultimately joins in the centre dividing the cell cytoplasm into two.
Answer
Answer: True.
IV. Match the item of column I with the items of column II
| Column I | Column II |
| (a) Mitosis is divided | 1. Quiescent stage (Gg) of the cell cycle. |
| (b) Resting phase | 2. at metaphase is referred to as the metaphase plate. |
| (c) G1 phase to enter meristematically | 3. Prophase, Metaphase, Anaphase Telophase. |
| (d) Prophase which is the first stage | 4. (1) centromeres split and chromatids separate (2) Chromatids move to opposite poles. |
| (e) The plane of alignment of the chromosomes | 5. at the end of meiosis II. |
| (f) Anaphase stage is characterised by the key events. | 6. Interphase |
| (g) Four haploid cells are formed | 7. called meiosis I and meiosis II |
| (h) Meiosis involves two sequential cycles of nuclear and cell division, | 8. of mitosis follows the S and S2 phases of interphase. |
| (i) Zygotene | 9. second stage of prophase I. |
| (j) Crossing over is also an enzyme mediated process and the enzyme involved | 10. is called recombinase. |
| (k) Diakinesis | 11. This is the final stage of meiotic prophasel, marked by terminalisation of chaismata. |
| (l) Metaphase I | 12. Meiosis ends with telophase II, in which the two groups of chromosomes once again get enclosed. |
| (m) Telophase I | 13. It begins with the simultaneous splitting of the centromeres of each chromosome. |
| (n) Ananaphase II | 14. The bivalent chromosomes align the equitorial plate. |
| (o) Telophase II | 15. The nuclear membrane reap-pears, cytokinesis follows and this is called as diad of cells. |
Answer
Answer:
| Column I | Column II |
| (a) Mitosis is divided | 3. Prophase, Metaphase, Anaphase Telophase. |
| (b) Resting phase | 6. Interphase |
| (c) G1 phase to enter meristematically | 1. Quiescent stage (Gg) of the cell cycle. |
| (d) Prophase which is the first stage | 8. of mitosis follows the S and S2 phases of interphase. |
| (e) The plane of alignment of the chromosomes | 2. at metaphase is referred to as the metaphase plate. |
| (f) Anaphase stage is characterised by the key events. | 4. (1) centromeres split and chromatids separate (2) Chromatids move to opposite poles. |
| (g) Four haploid cells are formed | 5. at the end of meiosis II. |
| (h) Meiosis involves two sequential cycles of nuclear and cell division, | 7. called meiosis I and meiosis II |
| (i) Zygotene | 9. second stage of prophase I. |
| (j) Crossing over is also an enzyme mediated process and the enzyme involved | 10. is called recombinase. |
| (k) Diakinesis | 11. This is the final stage of meiotic prophasel, marked by terminalisation of chaismata. |
| (l) Metaphase I | 14. The bivalent chromosomes align the equitorial plate. |
| (m) Telophase I | 15. The nuclear membrane reap-pears, cytokinesis follows and this is called as diad of cells. |
| (n) Ananaphase II | 12. Meiosis ends with telophase II, in which the two groups of chromosomes once again get enclosed. |
| (o) Telophase II | 13. It begins with the simultaneous splitting of the centromeres of each chromosome. |
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