NCERT CLASS 11 | TOPIC : CELL CYCLE AND CELL DIVISION | QB-2 | NEET BIOLOGY ONLINE TEST

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NCERT CLASS 11 | TOPIC : CELL CYCLE AND CELL DIVISION | QB-2 | NEET BIOLOGY ONLINE TEST

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It contains 75 important questions. Choose the most correct answer. Then check your answer. Try again if there are errors. Regards : www.onlinetest.kalvisolai.com

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1 ➤ 101. In plant cells, cytokinesis occurs by

(a) Furrowing (b) Invagination (c) Anticlinal division (d) Cell plate formation

2 ➤ 102. The phase of cell cycle during which ‘DNA polymerase’ is functionally active is

(a) S (b) G2 (c) G1 (d) M

3 ➤ 103. The number of mitotic divisions required to produce 128 cells from a single cell is

(a) 7 (b) 14 (c) 8 (d) 36

4 ➤ 104. Which statement is correct for meiosis?

(a) Meiosis I is reduction division (b) Meiosis II is reduction division (c) Meiosis I and II are both reduction divisions (d) Meiosis I and II both are not reduction divisions

5 ➤ 105. Which of the following is the longest phase of meiosis?

(a) Prophase I (b) Anaphase I (c) Prophase II (d) Metaphase II

6 ➤ 106. The following diagram shows modification of the meiosis II for storage. Identify A, B, C, D from the below figure.

(a) A–Prophase II, B–Metaphase II, C–Anaphase II, D–Telophase II (b) A–Anaphase II, B–Prophase II, C–Telophase II, D–Metaphase II (c) A–Metaphase II, B–Telophase II, C–Prophase II, D–Anaphase II (d) A–Telophase II, B–Anaphase II, C–Metaphase II, D–Prophase II

7 ➤ 107. G1 phase is

(a) End of mitosis and the start of S-phase (b) End of S-phase and the start of mitosis (c) Start of S-phase and the start of mitosis (d) End of S-phase and the end of mitosis

8 ➤ 108. At which stage of mitosis the chromatids separate and pass to different poles?

(a) Prophase (b) Metaphase (c) Anaphase (d) Telophase

9 ➤ 109. During meiosis, the crossover occurs between

(a) Sister chromatids of homologous chromosomes (b) Non-sister chromatids of homologous chromosomes (c) Sister chromatids of non-homologous chromosomes (d) Non-homologous chromatids of homologous chromosomes

10 ➤ 110. Which of the following is not true for anaphase?

(a) Golgi body and ER are reformed (b) Spindle poles move further apart (c) Chromosomes move to opposite poles (d) Centromeres split and chromatids separate

11 ➤ 111. The longest phase of meiosis I is

(a) Metaphase I (b) Prophase I (c) Anaphase I (d) Telophase I

12 ➤ 112. Cyclin protein is required for cell cycle. Which other molecule is essential for the completion of cell cycle?

(a) CCK (b) CKC (c) CDK (d) CKD

13 ➤ 113. Which is the correct statements from the following:

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I. Synapsis of homologous chromosomes takes place during prophase I of meiosis.

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II. Division of centromeres takes place during anaphase I of meiosis.

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III. Spindle fibres disappear completely in telophase of mitosis.

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IV. Nucleoli reappear at telophase I of meiosis.

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(a) I only (b) III only (c) I and II only (d) I, III and IV only

14 ➤ 114. Assertion: The complex formed by a pair of synapsed homologous chromosome is called a bivalent or a tetrad.

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Reason: The first two stages of prophase I are relatively short lived when compared to the next stage that is pachytene.

(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion. (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion. (c) If the assertion is true but the reason is false. (d) If both the assertion and reason are false.

15 ➤ 115. Assertion: In oocytes of some vertebrates, the diplotene can last for months or years.

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Reason: The final stage of meiotic prophase I is diakinesis.

(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion. (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion. (c) If the assertion is true but the reason is false. (d) If both the assertion and reason are false.

16 ➤ 116. Assertion: Variartions are are very important for the process of evolution.

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Reason: Most of the organelle duplication occur in G1 phase of cell cycle.

(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion. (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion. (c) If the assertion is true but the reason is false. (d) If both the assertion and reason are false.

17 ➤ 117. Assertion: Liquid endosperm in coconut is multinucleated.

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Reason: Karyokinesis is not followed by cytokinesis.

(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion. (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion. (c) If the assertion is true but the reason is false. (d) If both the assertion and reason are false.

18 ➤ 118. Assertion: Karyokinesis occurs in S-phase

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Reason: Cell division stops in M-phase

(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion. (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion. (c) If the assertion is true but the reason is false. (d) If both the assertion and reason are false.

19 ➤ 119. Assertion: Interphase is the resting stage.

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Reason: The interphase cell is metabolically inactive.

(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion. (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion. (c) If the assertion is true but the reason is false. (d) If both the assertion and reason are false.

20 ➤ 120. Assertion: DNA synthesis occurs in G1 and G2 periods of cell cycle.

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Reason: During G1 and G2 phase the DNA contents become double.

(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion. (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion. (c) If the assertion is true but the reason is false. (d) If both the assertion and reason are false.

21 ➤ 121. Assertion: Mitosis maintains the genetic similarity of somatic cells.

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Reason: Chromosomes do not undergo crossing over.

(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion. (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion. (c) If the assertion is true but the reason is false. (d) If both the assertion and reason are false.

22 ➤ 122. Assertion: Chiasmata is formed during diplotene.

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Reason: Chiasmata are formed due to the deposition of nucleoproteins.

(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion. (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion. (c) If the assertion is true but the reason is false. (d) If both the assertion and reason are false.

23 ➤ 123. Assertion: During zygotene, chromosomes show bivalent stage.

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Reason: Bivalent is half the number of chromosomes.

(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion. (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion. (c) If the assertion is true but the reason is false. (d) If both the assertion and reason are false.

24 ➤ 124. Assertion: Meiosis takes place in pollen mother cells.

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Reason: Each pollen mother cell produces 4 haploid pollen grains.

(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion. (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion. (c) If the assertion is true but the reason is false. (d) If both the assertion and reason are false.

25 ➤ 125. Assertion: Meiotic division results in the production of haploid cells.

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Reason: Synapsis occurs during zygotene of meiosis. Assertion and Reason Questions

(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion. (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion. (c) If the assertion is true but the reason is false. (d) If both the assertion and reason are false.

26 ➤ 126. Assertion: Plant shows open growth.

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Reason: Plant contains meristmetic tissues.

(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion. (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion. (c) If the assertion is true but the reason is false. (d) If both the assertion and reason are false.

27 ➤ 127. Assertion: Prophase is characterised by formation of mitotic chromosome.

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Reason: Chromosomal material condenses in prophase stage.

(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion. (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion. (c) If the assertion is true but the reason is false. (d) If both the assertion and reason are false.

28 ➤ 128. Assertion: Morphology of chromosome is studied in metaphase stage.

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Reason: Condensation of chromosome is completed in this stage and can be easily visualised under microscope.

(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion. (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion. (c) If the assertion is true but the reason is false. (d) If both the assertion and reason are false.

29 ➤ 129. Assertion: Chromatid separation occurs in anaphase stage.

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Reason: Centromere splitting occurs in anaphase stage.

(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion. (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion. (c) If the assertion is true but the reason is false. (d) If both the assertion and reason are false.

30 ➤ 130. Assertion: In some social insect haploid cells divide by mitosis

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Reason: Growth of multicellular organism is due to mitosis

(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion. (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion. (c) If the assertion is true but the reason is false. (d) If both the assertion and reason are false.

31 ➤ 131. Assertion: Stage between two meiotic divisions (I & II) is referred as interkinesis.

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Reason: Interkinesis is short lived phase.

(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion. (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion. (c) If the assertion is true but the reason is false. (d) If both the assertion and reason are false.

32 ➤ 132. Assertion: Meiotic division help in evolution process.

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Reason: Meiosis increases genetic variability in the population.

(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion. (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion. (c) If the assertion is true but the reason is false. (d) If both the assertion and reason are false.

33 ➤ 133. Assertion: The complex formed by a pair of synapsed homologous chromosome is called as tetrad.

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Reason: Each of the homologous chromosomes in meiotic prophase I consists a two closely apposed sister chromatids.

(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion. (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion. (c) If the assertion is true but the reason is false. (d) If both the assertion and reason are false.

34 ➤ 134. Assertion: In oocytes, diplotene can last for months or years

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Reason: It is at this stage that chromosome decondense and engage in RNA synthesis

(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion. (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion. (c) If the assertion is true but the reason is false. (d) If both the assertion and reason are false.

35 ➤ 135. Assertion: Mitosis is called equational division.

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Reason: Mitosis is the division of parent cell into two identical daughter cells having the same amount of DNA as in parent cell.

(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion. (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion. (c) If the assertion is true but the reason is false. (d) If both the assertion and reason are false.

36 ➤ 136. Assertion: The interphase is considered as the most active stage of cell cycle.

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Reason: This phase is a period of intense synthesis and growth

(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion. (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion. (c) If the assertion is true but the reason is false. (d) If both the assertion and reason are false.

37 ➤ 137. Assertion: Disappearance of nuclear membrane is generally essential for karyokinesis.

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Reason: Forward movement of chromosomes is dependent on spindle apparatus, which organise is cytoplasm.

(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion. (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion. (c) If the assertion is true but the reason is false. (d) If both the assertion and reason are false.

38 ➤ 138. Assertion: Kinetochore is essential for cell division.

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Reason: Kinetochore serves as the sites of attachment of spindle fibres to the chromosome.

(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion. (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion. (c) If the assertion is true but the reason is false. (d) If both the assertion and reason are false.

39 ➤ 139. Assertion: Meiosis is also known as reduction division.

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Reason: Meiosis reduces the number of chromosome in daughter cells.

(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion. (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion. (c) If the assertion is true but the reason is false. (d) If both the assertion and reason are false.

40 ➤ 140. Assertion: Meiosis produces four genetically dissimilar cells.

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Reason: Crossing over or gene exchange takes place in meiosis.

(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion. (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion. (c) If the assertion is true but the reason is false. (d) If both the assertion and reason are false.

41 ➤ 141. Assertion: In mitotic metaphase, morphology of chromosomes can most easily study.

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Reason: Condensation of chromosomes is completed in this stage.

(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion. (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion. (c) If the assertion is true but the reason is false. (d) If both the assertion and reason are false.

42 ➤ 142. Assertion: Cell growth results into division.

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Reason: Cell growth leads to change in nucleocytoplasmic ratio.

(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion. (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion. (c) If the assertion is true but the reason is false. (d) If both the assertion and reason are false.

43 ➤ 143. Assertion: During pachytene crossing over takes place which is dependent on recombinase.

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Reason: Recombinase is the group of enzymes involved in crossing over and crossing over is an enzyme dependent process.

(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion. (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion. (c) If the assertion is true but the reason is false. (d) If both the assertion and reason are false.

44 ➤ 144. Assertion: Colchicine is a mitotic poison.

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Reason: Colchicine interferes in the arrangement of spindle fibres. previous year questions

(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion. (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion. (c) If the assertion is true but the reason is false. (d) If both the assertion and reason are false.

45 ➤ 1. An elaborate network of filamentous proteinaceous structures present in the cytoplasm which helps in the maintenance of cell shape is called [AIPMT MAINS 2010]

(a) Thylakoid (b) Endoplasmic reticulum (c) Plasmalemma (d) Cytoskeleton

46 ➤ 2. During mitosis the ER and nucleolus begins to disappear at [AIPMT PRE 2010]

(a) Late prophase (b) Early metaphase (c) Late metaphase (d) Early prophase

47 ➤ 3. Which stages of cell division do the following figures A and B represent respectively? A B [AIPMT PRE 2010]

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(a) (b) (c) (d)

48 ➤ 4. At metaphase, the chromosomes are attached to the spindle fibres by their [AIPMT MAINS 2011]

(a) Satellites (b) Secondary constrictions (c) Kinetochores (d) Centromeres

49 ➤ 5. Identify the meiotic stage in which the homologous chromosomes separate while the sister chromatids remain associated at their centromeres: [AIPMT MAINS 2012]

(a) Metaphase II (b) Anaphase I (c) Anaphase II (d) Metaphase I

50 ➤ 6. During gamete formation the enzyme recombinase participates during [AIPMT PRE 2012]

(a) Metaphase I (b) Anaphase II (c) Prophase I (d) Prophase II

51 ➤ 7. Given below is the representation of a certain event at a particular stage of a type of cell division. What is this stage? [AIPMT PRE 2012]

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(a) Prophase I during meiosis (b) Prophase II during meiosis (c) Prophase of mitosis (d) Both prophase and metaphase of mitosis

52 ➤ 8. The complex formed by a pair of synapsed homologous chromosomes is called [AIPMT 2013]

(a) Equatorial plate (b) Kinetochore (c) Bivalent (d) Axoneme

53 ➤ 9. A stage of cell division is shown in the below figure. Select the answer which gives the correct identification of this stage with its characteristics. [AIPMT 2013]

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(a) Telophase - Nuclear envelope reforms, Golgi complex reforms. (b) Late anaphase - Chromosomes move away from the equatorial plate, Golgi complex is not present. (c) Cytokinesis - Cell plate formed by mitochondria is distributed between two daughter cells. (d) Telophase - Endoplasmic reticulum and nucleolus is not reformed yet.

54 ➤ 10. During which phase(s) of cell cycle, the amount of DNA in a cell remains at 4C level if the initial amount is denoted as 2C? [AIPMT 2014]

(a) G0 and G1 (b) G1 and S (c) Only G2 (d) G2 and M

55 ➤ 11. In ‘S’ phase of the cell cycle [AIPMT 2014]

(a) The amount of DNA doubles in each cell. (b) The amount of DNA remains same in each cell. (c) The chromosome number is increased. (d) The amount of DNA is reduced to half in each cell.

56 ➤ 12. The enzyme recombinase is required at which state of meiosis [AIPMT 2014]

(a) Pachytene (b) Zygotene (c) Diplotene (d) Diakinesis

57 ➤ 13. Select the correct option. Column I Column II

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A. Synapsis aligns homologous chromosomes – 1. Anaphase II

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B. Synthesis of RNA and protein – 2. Zygotene

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C. Action of enzyme recombinase – 3. G2 phase

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D. Centromeres do not separate but chromatids move towards opposite poles – 4. Anaphase I [AIPMT 2015]

(a) A : 2, B : 1, C : 3, D : 4 (b) A : 2, B : 3, C : 1, D : 4 (c) A : 1, B : 2, C : 3, D : 4 (d) A : 2, B : 3, C : 4, D : 1

58 ➤ 14. A somatic cell that has just completed the S phase of its cell cycle when compared to the gamete of the same species has [AIPMT 2015]

(a) Twice the number of chromosomes and twice the amount of DNA. (b) Same number of chromosomes but twice the amount of DNA. (c) Twice the number of chromosomes and four times the amount of DNA. (d) Four times the number of chromosomes and twice the amount of DNA.

59 ➤ 15. Arrange the following events of meiosis in correct sequence: [RE-AIPMT 2015]

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(A) Crossing over (B) Synapsis (C) Terminalization of chiasmata (D) Disappearance of nucleolus

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(a) (B), (A), (C), (D) (b) (A), (B), (C), (D) (c) (B), (C), (D), (A) (d) (B), (A), (D), (C)

60 ➤ 16. Spindle fibres attach on to: [NEET - I, 2016]

(a) Telomere of the chromosome (b) Kinetochore of the chromosome (c) Centromere of the chromosome (d) Kinetosome of the chromosome

61 ➤ 17. In meiosis crossing over is initiated at: [NEET - I, 2016]

(a) Pachytene (b) Leptotene (c) Zygotene (d) Diplotene

62 ➤ 18. Which of the following is not characteristic feature during mitosis in somatic cells? [NEET - I, 2016]

(a) Spindle fibres (b) Disappearance of nucleolus (c) Chromosome movement d) Synapsis

63 ➤ 19. During cell growth, DNA synthesis takes place in [NEET - II, 2016]

(a) G1 phase (b) G2 phase (c) M phase (d) S phase

64 ➤ 20. Match the stage of meiosis in Column – I to their characteristic features in Column – II

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A. Pachytene - 1. Pairing of homologous chromosomes

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B. Metaphase I - 2. Terminalisation of chiasmata

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C. Diakinesis - 3. Crossing over takes place

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D. Zygotene - 4. Chromosomes align at equatorial plate

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[NEET - II, 2016]

(a) A : 1, B : 4, C : 2, D : 3 (b) A : 2, B : 4, C : 3, D : 1 (c) A : 4, B : 3, C : 2, D : 1 (d) A : 3, B : 4, C : 2, D : 1

65 ➤ 21. When cell has stalled DNA replication fork which checkpoint should be predominantly activated? [NEET - II, 2016]

(a) G2/M (b) M (c) Both G2/M and M (d) G1/S N CERT Exemplar Questions

66 ➤ 1. Meiosis results in

(a) Production of gametes (b) Reduction in the number of chromosomes (c) Introduction of variation (d) All the above

67 ➤ 2. At which stage of meiosis does the genetic constitution of gametes is finally decided?

(a) Metaphase I (b) Anaphase II (c) Metaphase II (d) Anaphase I

68 ➤ 3. Meiosis occurs in organisms during

(a) Sexual reproduction (b) Vegetative reproduction (c) Both sexual and vegetative reproduction (d) Pairing of homologous chromosomes

69 ➤ 4. During anaphase–I of meiosis

(a) Homologous chromosomes separate (b) Non-homologous autosomes separate (c) Sister chromatids separate (d) Non-sister chromatids separate

70 ➤ 5. Mitosis is characterized by

(a) Reduction division (b) Equal division (c) Both reduction and equal division (d) Pairing of homologous chromosomes

71 ➤ 6. A bivalent of meiosis-I consists of

(a) Two chromatids and one centromere (b) Two chromatids and two centromeres (c) Four chromatids and two centromeres (d) Four chromatids and four centromeres.

72 ➤ 7. Cells which are not dividing are likely to be at

(a) G1 (b) G2 (c) G0 (d) S phase

73 ➤ 8. Which of the events listed below is not observed during mitosis?

(a) Chromatin condensation. (b) Movement of centrioles to opposite poles. (c) Appearance of chromosomes with two chromatids joined together at the centromere. (d) Crossing over

74 ➤ 9. Identify the wrong statement about meiosis

(a) Pairing of homologous chromosomes. (b) Four haploid cells are formed. (c) At the end of meiosis the number of chromosomes are reduced to half. (d) Two cycles of DNA replication occur.

75 ➤ 10. Select the correct statement about G1 phase.

(a) Cell is metabolically inactive. (b) DNA in the cell does not replicate. (c) It is not a phase of synthesis of macromolecules. (d) Cell stops growing.

Your Score is

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76 ➤ Question

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100 ➤

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A) B) C) D)

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