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InterviewSolution
This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your knowledge and support exam preparation. Choose a topic below to get started.
| 451. |
At metaphase, chromosmes are attached to the spindle fibres by theirA. SatellitesB. Secondary constrictionsC. KinetochoresD. Centromere |
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Answer» Correct Answer - C Kinetochores are small disc shaped structures at the surface of centromeres which serve as sites of attachment of spindle fibres to the chromosomes. |
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| 452. |
During gamete formation, the enzyme recombinate participates duringA. Prophase-IB. Prophase-IIC. Metaphase-ID. Anaphase - II |
| Answer» Correct Answer - A | |
| 453. |
In mitosis the movement of chromosmes requiresA. Presence of centromereB. PlasmalemmaC. Spindle fibresD. Nucleotides |
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Answer» Correct Answer - c Because they are thread like structures, which contract to pull the chromosome towards pole. |
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| 454. |
Given below is the representation of a certain event at a particular stage of a type of cell division. Which is this stage A. prophase I during meiosisB. Prophase II during meiosisC. Prophase of MitosisD. Both prophase and metaphase of mitosis |
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Answer» Correct Answer - a Diagrame first represents crossing over that takes place in pachytene stageof prophase I during meiosis. |
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| 455. |
Given below is the representation of a certain event at a particular stage of a type of cell division. Which is this stage A. Prophase of MitosisB. Both prophase and Metaphase of mitosisC. Prophase I during meiosisD. Prophase II during meiosis |
| Answer» Correct Answer - C | |
| 456. |
Given below is the representation of a certain event at a particular stage of a type of cell division. Which is this stage A. Prophase of mitosisB. Both prophase and metaphase of mitosisC. Prophase-I during meiosisD. Prophase-II during meiosis |
| Answer» Correct Answer - C | |
| 457. |
In which stage DNA replication takes place ?A. MetaphaseB. `G_(1)` phaseC. S-phaseD. `G_(2)` phase |
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Answer» Correct Answer - C S or synthesis phase marks the period during which DNA synthesis or replication takes place. |
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| 458. |
What is the proper sequence in mitosis ?A. Metaphase,telophase,prophase, and anaphaseB. Prophase, metaphase,anaphase,and telophaseC. Anaphase,metaphase, teophase,and prophaseD. Telophase,anaphase,metaphase,and prophase |
| Answer» Correct Answer - B | |
| 459. |
What is the proper sequence in mitosis ?A. Metaphase,Telophase,Prophase,AnaphaseB. Prophase,Metaphase,Anaphase,TelophaseC. Anaphase,Metaphase,Telophase,ProphaseD. Telophase,Anaphase,Telophase,Prophase |
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Answer» Correct Answer - B Prophase, metaphase , anaphase and telophase is the proper sequence in mitosis. |
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| 460. |
Cytokinesis isA. Division of nucleusB. Division of chromosomesC. Division of cytoplasmD. None of above |
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Answer» Correct Answer - C Cytokinesis is division of cytoplasm. |
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| 461. |
In plant cells, cytokinesis occurs byA. Cell plateB. InvaginationC. FurrowingD. All of the above |
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Answer» Correct Answer - A In plant cells, cytokinesis occurs by cell plate. |
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| 462. |
In plant cells, cytokinesis occurs byA. Cell plate formationB. InaviginationC. CleavageD. Furrowing |
| Answer» Correct Answer - A | |
| 463. |
Suppose an organism has 5 pg of DNA in nucleus of its egg. How much DNA would a diploid cell has in its nucleus at `G_(1)` ?A. 5 pgB. 10 pgC. 20 pgD. 2.5 pg |
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Answer» Correct Answer - B Egg is haploid and has 5 Pg (picogram) DNA. Its animal which is diploid will be having 10 Pg DNA. In S phase DNA doubles and, therefore, in `G_(2)` amount of DNA will be 20 Pg and in `G_(1)` it is 10 Pg. |
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| 464. |
If the egg of an organism has 10 Pg of DNA in its nucleus, how much DNA would a diploid cell of same organism have in G2-phase of MeiosisA. 10 PgB. 5 PgC. 20 PgD. 40 Pg |
| Answer» Correct Answer - D | |
| 465. |
Which cell division is found during cleavageA. AmitosisB. MitosisC. Closed mitosisD. Meiosis |
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Answer» Correct Answer - c During cleavage, cell divides mitotically without taking any gap, so that is known as closed mitosis. |
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| 466. |
If the number of dyads at each pole during Anaphase-I is 25 the gametes will contain how many chromosomes?A. 25B. 50C. 100D. None of above |
| Answer» Correct Answer - A | |
| 467. |
Repulsion of homologous chromosomes takes place inA. ZygoteneB. LeptoteneC. DiakinesisD. Pachytene |
| Answer» Correct Answer - C | |
| 468. |
Synaptonemal complex was discovered inA. 1956B. 1650C. 1935D. 1980 |
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Answer» Correct Answer - a Synaptonernal complex is formed during meiotic prophase first. |
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| 469. |
Which is the character of mitosis ?A. LeptoteneB. ZygoteneC. PachyteneD. None of the above |
| Answer» Correct Answer - D | |
| 470. |
Synaptonemal complex is formed duringA. MeioisB. AmitosisC. MitosisD. Cytokinesis |
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Answer» Correct Answer - a Synaptonemal complex is formed during meiotic prophase first. |
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| 471. |
Which is not the character of mitosisA. LeptoteneB. ZygoteneC. PachyteneD. All of the above |
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Answer» Correct Answer - d Leptotene, zygotene, pachytene, diplotene and diakinesis all are are successive stages of meiosis. |
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| 472. |
Assertion: Karyokinesis occurs in M-phase Reason: Cell division stops in M-phase.A. If both assertion `&` Reason are True `&` the Reason is a corrrect explanation of the Asserion.B. If both Assertion `&` Reason are True but Reason is not correct explanation of the Assertion.C. If Assertion is Trie but the Reason is False.D. If both Assertion `&` Reason are false |
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Answer» Correct Answer - d M-phase represetns the phase of actual division. It consists of karyokineis (The divison of nucleus) followed by cytokinesis (The divison of cytoplasm). Cell divisons stop after M-phase. |
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| 473. |
Beads on string like structures of A are seen in B, which further condense to form chromosomes in C stage of cell division. Identify A, B, C.A. a-Chromonema,b-Chromatin,c-MetaphaseB. a-Chromatin,b-chromatid,c-MetaphaseC. a-Chromonema,b-Chromosome,c-AnphaseD. a-Chromonema,b-Chromatids,c-Anaphase |
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Answer» Correct Answer - A Beads on string of chromonema are seen in chromatin which condensene to form chromosomes in metaphse stage stage of cell division. |
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| 474. |
How many cells and meiosis are required to produce 200 cells ?A. 50, 25B. 25, 25C. 50, 50D. 50, 125 |
| Answer» Correct Answer - C | |
| 475. |
Which of the following chracters is related with telophaseA. Formation of nuclear membraneB. Formation of nucleolusC. Elongation of chromosomeD. Formation of two daughter nuclei |
| Answer» Correct Answer - d | |
| 476. |
Which of the following chracters is related with telophaseA. Formation of nuclear membrane B. Formation of nucleolusC. Elongation of chromosomeD. Formation of two daughter nuclei |
| Answer» Correct Answer - d | |
| 477. |
Read the following statements about cell division and select the correct ones. (i) M phase represents the phase when actual cell division occurs and I phase represetns the phase between two successive M phases. (ii) In the 24 hours average duration of cell cycle of a human cell, cell division proper lasts for only about an hour. (iii) M phase constitutes more than 95% of the duration of cell cycle.A. i and iiB. ii and iiiC. i and iiiD. i,ii and iii |
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Answer» Correct Answer - A Cell cycle consists of two basic phases, long non-dividing I phase and a short-dividing M phase. In the average duration of 24 hours in the cell cycle of a dividing human cell, M phase lasts for one hour (less than 5% of total ) while I phase or interphase occupies 75-95% of total generation time. |
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| 478. |
Reorganisation of genetic material or genetic recombination occurs duringA. mitosisB. meiosisC. organogensisD. metamorphosis |
| Answer» Correct Answer - B | |
| 479. |
Prophase is longer inA. Mitosis occurs after `G_(0)` phaseB. MeiosisC. Equal in bothD. Amitosis |
| Answer» Correct Answer - b | |
| 480. |
Meiosis occurs in organisms duringA. Sexual reproductionB. Vegetative reproductionC. Both sexual and vegetative reproduc- tionD. None of the above |
| Answer» Correct Answer - a | |
| 481. |
Meiosis occurs in organisms duringA. sexual reproductionB. vegetative reproductionC. both sexual and vegetative reproductionD. none of these |
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Answer» Correct Answer - A The production of offspring by sexual reproduction includes the fusion of two gametes, each with complete haploid set of chormosomes, For this, gametes are formed from specialised diploid cells which undergo meiosis that reduces the chromosome number by half resulting in the production of haploid daughter cells. |
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| 482. |
Why is meiosis important for living organisms?A. It produces new daughter cells that are highly similar to the parent cellB. it allows organisms to produce new clones of themselvesC. it produces two daughter cells from every parent cellD. it introduces genetic variation by producing genetically different daughter cells |
| Answer» Correct Answer - D | |
| 483. |
Which of the following is not the characteristic of prophase-I ?A. SynapsisB. SegregationC. crossing overD. Chiasmata formation |
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Answer» Correct Answer - B Segregation is the chracteristic of anaphase I. |
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| 484. |
Condensation of chromosomes occurs inA. Prophase IB. Prophase IIC. AnaphaseD. Metaphase |
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Answer» Correct Answer - a Condensation of chromosomes occurs in the prophase-1. after that chromosome moves toward the poles. |
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| 485. |
Which type of cell division occurs in the gonadsA. Mitosis onlyB. MeiosisC. Both a and bD. Amitosis and meiosis |
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Answer» Correct Answer - c Mitosis and both type of cell division occurs in gonads. Mitosis during growth and development and meiosis during gametogenesis. |
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| 486. |
During which phase(s) of cell cycle amount of DNA in a cell remains at 4C level if the initial amount is denoted an 2CA. Only `G_(2)`B. `G_(2)` and `M`C. `G_(0)` and `G_(1)`D. `G_(1)` and S |
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Answer» Correct Answer - a In m=phase, both 4C and 2C of DNA are present in different stages. |
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| 487. |
Meiosis occurs in organisms duringA. sexual reproductionB. vegetative reproductionC. Both (a) and (b)D. None of these |
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Answer» Meiosis occurs in sexually reproducing organisms to reduce the chromosome number to half before their gametes unit, so, as to maintain the constant chromosome number `(2n)` in the progery. Vegetative reproduction is a kind of asexual reproduction occurring in plants and does not involve the formation and fusion of gametes. |
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| 488. |
Centromere split in which stage of cell divisionA. AnaphaseB. TelophaseC. prophaseD. Metaphase |
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Answer» Correct Answer - A Centromere split in anaphase stage of cell division. |
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| 489. |
During which phase(s) of cell cycle amount of DNA in a cell remains at 4C level if the initial amount is denoted an 2CA. `G_(2)` and MB. `G_(0)` and `G_(1)`C. `G_(1)` and SD. Only `G_(2)` |
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Answer» Correct Answer - A Durin `G_(2)` and M phases of cell cylce ,amount od DNA in a cell remains at 4C level if the initial amount is denoted as 2C. |
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| 490. |
_______increases the genetic variability in the population of organisms.A. MitosisB. MeiosisC. both (a) and (b)D. None of these |
| Answer» Correct Answer - B | |
| 491. |
Meiosis in diploid organisms results inA. production of gametesB. reduction in the number of chromosomesC. introduction of variationD. all of the above |
| Answer» Correct Answer - D | |
| 492. |
Assertion: Variations are important for the process of evolution. Reason: Meiosis increases the genetic variability in the population of organisms from one generation ot the next.A. If both assertion and reason are true and reason is the correct explantion of assertionB. If both assertion and reason are true but reason is not the correct explnantion of assertion.C. If assertion is true but reason is false.D. If both assertion and reason are false. |
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Answer» Correct Answer - B Meiosis involves exhange of genes between homologous chormosomes. So, the gametes produced are genetically different from each other. Offspring produced by the fusion of gametes also show recombination of genetic variations. These variations in the offspring make organisms more adaptable to the enviroment and these have a definite role in evolution. |
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| 493. |
Variations appear during meiosis due toA. independent assortmentB. crossing overC. both A and BD. linkages |
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Answer» Correct Answer - C Variations appear during meiosis due to independent assortment and crossing over. |
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| 494. |
At which stage of mitosis, do these events occur?A. `{:("Spiralisation and condensation of DNA","Nuclear envelope breakdown","Centromeres split"),("Interphase","Interphase","Metaphase"):}`B. `{:("Spiralisation and condensation of DNA","Nuclear envelope breakdown","Centromeres split"),("Interphase","Prophase","Metaphase"):}`C. `{:("Spiralisation and condensation of DNA","Nuclear envelope breakdown","Centromeres split"),("Prophase","Metaphase","Anaphase"):}`D. `{:("Spiralisation and condensation of DNA","Nuclear envelope breakdown","Centromeres split"),("Prophase","Prophase","Anaphase"):}` |
| Answer» Correct Answer - D | |
| 495. |
The following events occur in mitosis and/or meiosis. Which event occurs only in meiosis?A. chromatid formationB. chromosome condensationC. chromosome movement to polesD. chromosome pairing |
| Answer» Correct Answer - D | |
| 496. |
Meiosis does not occur inA. bacteriaB. cyanobacteriaC. plant cellD. both a and b |
| Answer» Correct Answer - D | |
| 497. |
In Meiosis-I and meiosis-II, which is similar to mitosis? |
| Answer» Correct Answer - Meiosis II | |
| 498. |
In which of the following ways are mitosis and meiosis similar?A. Both have pairing of homologous chromosomes.B. Both are preceded by DNA replication.C. Both occur in all kinds of cells.D. Both include separation of paired chromomes. |
| Answer» Correct Answer - B | |
| 499. |
Write briefly the significane of mitosis and meiosis in multicellular organism |
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Answer» Multicellular organisms grow and develop with the involvement of mitotic cell division. Meiosis occurs in them to form gametes in their reproductive phase of life cycle. Significance of Mitosis (i) Multicellular plants and animals start life as single cells. The process of mitosis given rise to many cells which differentiate to form tissues, organ-systems of the organsim. (ii) it results in increase in size and growth of an organ. (iii) Cell reproduction is used to form new cells to renew certain tissues and to replace worn out cells. (iv) Mitosis is also involved in asexual reproductin in some organisms like in unicellular. Amoeba and multicellular Hydra as well as in vegetative reproduction in plants. Significance of meiosis (i) Meiosis is the mechanism by which conservation of specific chromosome number of each species is achieved across generations in sexually reproducing organisms. (ii) Meiosis also increases the genetic variability in the population of organisms from one generation to the next. Variations are very important for the porcess of evolution. |
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| 500. |
Histone protein synthesis occurs duringA. `G_(1)`-phaseB. `G_(2)`-PhaseC. S-phaseD. Prophase |
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Answer» Correct Answer - C Histone protein synthesis occurs during S-phase . |
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