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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.
| 351. |
The term "meiosis" was coined byA. Hertwig and Van BevedinB. Sutton and BoveriC. Hofmeister and WaldeyerD. Farmer and Moore |
| Answer» Correct Answer - d | |
| 352. |
The term "meiosis" was given byA. JohannsenB. Knoll and RuskaC. A. FlemmingD. Farmer and Moore. |
| Answer» Correct Answer - D | |
| 353. |
Which of the following will undergo meiosis and mitosis both ?A. OocytesB. SpermatidsC. Interstitial cellsD. Gonads |
| Answer» Correct Answer - D | |
| 354. |
The term meiosis was coined byA. FlemmingB. Farmer and MooreC. StasburgerD. Hofmeister |
| Answer» Correct Answer - B | |
| 355. |
The key feature(s) of metaphase is/areA. Spindle fibres attach to kinetochores of chromosomesB. Chromosome are moved to spindle equator and get aligment along metaphase plateC. Splitting of centromereD. Both A and B |
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Answer» Correct Answer - D The key features of metaphase are spindle fibres atach to kinetochores of chromosomes and chromosome are moved to spindle equator and get aligned along metaphase plate. |
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| 356. |
Cell would normally proceed to mitosis without interruptionA. `G_(1)` PhaseB. S-PhaseC. `G_(2)` PhaseD. M-Phase |
| Answer» Correct Answer - B | |
| 357. |
Cell would normally proceed to mitosis without interruptionA. When it has entered S-phaseB. Once it has entered `G_(2)`-phaseC. At any time during coil activityD. Irrespective of any phase |
| Answer» Correct Answer - A | |
| 358. |
Cell would normally proceed to mitosis without interruptionA. once it has entered the S phaseB. once it has entered the `G_(2)` phaseC. at any time during cell division activityD. none of these |
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Answer» Correct Answer - A The availability of mitogen and energy rich compounds decide wheter `G_(1)` phase will be arrested (`G_(0)` phase) or undergo S-phase. This point is called check point or `G_(1)` cyclin or `G_(1)` point. Once the check point of `G_(1)`-phase is crossed and cell has entered S-phase, cell cycle will go on further division till completion. |
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| 359. |
Anaphase stage is characterised byA. Centromeres split and chromatids separateB. Chromatids move to opposite polesC. Nucleolus, GB and ER reformD. Both A and B |
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Answer» Correct Answer - D Anaphase stage is chracterised by centromeres split and chromatids separate ,and chromatids move to opposite poles. |
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| 360. |
Anaphase I is characterised byA. Alignment of chromosomes on equatorial plate.B. Reappearance of nucleolus nuclear membraneC. Separation of homologous chromosomes.D. Terminalisation of chasmata |
| Answer» Correct Answer - A::C | |
| 361. |
Select the incorrect statement regarding S phase of interphase.A. It occurs between `G_(1)` and `G_(2)`B. DNA replicates in the nucleus in this phase.C. Centrioles duplicate in the cytoplasm.D. As DNA doubled, number of chromosomes also doubles. |
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Answer» Correct Answer - D S or synthesis phase marks the period during which DNA synthesis or replication takes place. DNA synthesis or replication takes place. During this time the amount of DNA per cell doubles, however, there is no increase in the chromosome number. |
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| 362. |
At the end of metosis ____________ daughter cells are formedA. Four haploidB. Four diploidC. Two haploidD. Two diploid |
| Answer» Correct Answer - A | |
| 363. |
Which one of the following statement is incorrect for interphase stage ?A. Period of great metabolic activityB. Also called preparatory PhaseC. Absence of replication of DNAD. It covers over 95% of the total duration of cell cycle |
| Answer» Correct Answer - C | |
| 364. |
Post-mitolic gap phase is characterised by all, exceptA. Synthesis of histone proteinsB. Synthesis of RNA and nucleotidesC. Most-variable in lengthD. NO change in DNA contents |
| Answer» Correct Answer - A | |
| 365. |
Premitotic gap is also known asA. S-phaseB. `G_(2)`-phaseC. `G_(0)`-phaseD. `G_(1)`-phase |
| Answer» Correct Answer - B | |
| 366. |
Postmitotic gap phase and synthetic phase refer toA. `G_(2) and S`B. `G_(1) and S`C. `G_(1) and G_(2)`D. `S and G_(2)` |
| Answer» Correct Answer - B | |
| 367. |
Chromosomes are least condensed duringA. TelophaseB. InterphaseC. MetaphaseD. Anaphase |
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Answer» Correct Answer - B Chromosomes are least condensed during interphase. |
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| 368. |
What is the significent of mitosisA. GrowthB. RepairC. ReplacementD. All of the above |
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Answer» Correct Answer - D Growth , repair and replacement are the significance of mitosis. |
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| 369. |
A very significent contribution of mitosis is cell repair. Repairing takes place in our body inA. Blood cellB. Upper layer of epidermisC. Cells of the lining of the gutD. All of the above |
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Answer» Correct Answer - D A very significant contribution of mitosis of cell repair. Repairing takes place in our body in blood cells, upper layer of epidermis and cells of the lining of the gut. |
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| 370. |
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 II during meiosisB. Prophase of MitosisC. Both prophase and metaphase of mitosisD. Prophase I during meiosis |
| Answer» Correct Answer - D | |
| 371. |
During gamete formation, the enzyme recombinate participates duringA. Anaphase-IIB. Prophase-IC. Prophase-IID. Metaphase-I |
| Answer» Correct Answer - B | |
| 372. |
In meiosis, synapsis occurs duringA. ZygoteneB. DiploteneC. PachyteneD. Leptotene |
| Answer» Correct Answer - A | |
| 373. |
Synapsis occurs betweenA. two homologaus chromosomesB. a male and a female gameteC. mRNA and ribosomesD. spindle fibres and centromere |
| Answer» Correct Answer - A | |
| 374. |
Meiosis can be observed inA. Root tipsB. CambiumC. Anther (PMC)D. Pollen grains |
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Answer» Correct Answer - c As a result of it pollen grains formed. |
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| 375. |
Given diagram shows variations in the amount of DNA of a developing eukaryote. What the arrow denotes? A. First meiotic anaphaseB. Second meiotic anaphaseC. Mitotic anaphaseD. Mitotic telophase |
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Answer» Correct Answer - B The given graph shows variations in the DNA content in the cells of a eukaryote. Hploid set of chromosomes 1C is present in gamete which on fertilisation with gamete of opposite sex acquires diploid set of chormosomes (2C) and transforms into embryo embryo develops and grows into diplid organism by multiple mitotic divisions. During sexual reproduction gamete formation takes place by meiotic divison under which amount of DNA (2C) increases to 4C during S phase, which in first meiotic divison reduces to half i.e., 2C, divided among two daughter cells wheresas chormosomal number reduces to half i.e., from 2n to n. During second meiotic division, the amont of DNA is further distriuted equally from each daughter cells from first meiotic division ) to two daughter cells. The second meiotic division is equational, therefore the number of chromosome remains the same as produced at the end of meiosis I. Thus at the end of meiosis-II, each of the four haploid daughter cells contains one copy of every chromosme in the set (1C), rather two. |
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| 376. |
Dipotene stage of prophase-I is characterised byA. dissolution of synaptonemal complexB. separation of synapsed homologous chromosomes except at the site of croosoversC. formation of X-shpaed structures called chiasmataD. all of these |
| Answer» Correct Answer - D | |
| 377. |
Zygotene of prophase-I is characterised byA. chromomeresB. synaptonemal complexC. crossing overD. terminalisation of chiasmata. |
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Answer» Correct Answer - B During zygotene of meiotic prophase I, chormosomes start paring and are called homologous chromosomes. A pair of homologous chromosomes lying together is called a bivalent. The complex formed by a pair of synapsed homologous chormosomes is called synaptonemal complex. |
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| 378. |
The best stageto count the number of chromosomes during mitiosis is or structure of chromosomes can be best seen at Or In which phase of mitosis the chromosomes are arranged around the equator of the spindleA. ProphaseB. Metaphase-TelophaseC. AnaphaseD. Telophase |
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Answer» Correct Answer - b Because in metaphase, chromosomes are present in bivalent form on equator. Chromosomes are much condense and well visible. |
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| 379. |
Shape of chromosome can be best observed duringA. ProphaseB. MetaphaseC. AnaphaseD. Telophase |
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Answer» Correct Answer - B Shape of chromosome can be best observed during metaphase. |
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| 380. |
During meiosis I,chromosome numberA. is reduced to halfB. doubles upC. remains the sameD. either a or b |
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Answer» Correct Answer - A Meiosis is the type of cell division by which gamete cells (eggs and sperm) are produced. Meiosis involves two successive nuclear divisions and one cytoplasmic division that produce four halploid cells. The first division (meiosis I) is the reductional division during which number of chromosomes is reducing to half. The second divison (meiosis II) separates the chromatids. it is called equational division as chromosome number remains the same as produced after meiosis I. |
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| 381. |
The chromosome morphology is best studied duringA. ProphaseB. Metaphase, as the chromosomes are most condensedC. Anaphase,as the chromosomes are most condensedD. Telophase |
| Answer» Correct Answer - B | |
| 382. |
What will be the gametic chromosome number of a cell, if somatic cell have 40 chromosome?A. 10B. 20C. 30D. 40 |
| Answer» Correct Answer - B | |
| 383. |
Chromosomes can be seen best duringA. Prophase stageB. MetaphaseC. Anaphase ID. Telophase I |
| Answer» Correct Answer - B | |
| 384. |
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-metaphseB. A-Chromation, B-Chromatid, C-metaphaseC. A-Chromonema, B-chromosome, C-anaphaseD. A-chromonema, B-chromatid, C-anaphase |
| Answer» Correct Answer - D | |
| 385. |
Which of the following property is seen between the homologous chromosomes during zygotene?A. CohesionB. SynapsisC. both (a) and (b)D. Adhesion |
| Answer» Correct Answer - B | |
| 386. |
Number of meiosis required to produce 100 megaspore in angiosperms isA. 125B. 100C. 25D. 75 |
| Answer» Correct Answer - B | |
| 387. |
Lampbrush chromosomes are seen in which typical stage?A. Mitotic anaphaseB. Mitotic prophaseC. Mitotic metaphaseD. Meiotic prophase |
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Answer» Correct Answer - D The lampbrush chromosomes occuring in prophase of meiosis I are highly elongated special kind of synapsed mid-prophase or diplotene chromosome bivalents which have already undergone crossing over. |
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| 388. |
Constancy of the chromosome number in sexually produring generation is brought by the process ofA. MeiosisB. MitosisC. AmitosisD. None |
| Answer» Correct Answer - A | |
| 389. |
During gamete formation, the enzyme recombinate participates duringA. Anaphase IIB. Prophase IC. Prophase IID. Metaphase I |
| Answer» Correct Answer - B | |
| 390. |
Select the correct option with respect to mitosisA. Chromosomes move to the spindle equator and get aligned along equatorial plate in metaphaseB. Chromatids separate but remain in the centre of the cell in anaphaseC. Chromatids start moving towards opposite poles in telophaseD. Golgi complex and endoplasmic reticulum are still visible at the end of prophase |
| Answer» Correct Answer - A | |
| 391. |
The number of mitotic cell division required to produce 256 cells from single cell would beA. 128B. 255C. 10D. All wrong |
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Answer» Correct Answer - B It is always 1 less than the total number of cells asked. |
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| 392. |
Bacterial cell divides in every minute it takes one hour to fill up a cup. How much time be taken to fill half the cupA. 30 minutesB. 29 minutesC. 59 minutesD. 15 minutes |
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Answer» Correct Answer - C For filling one fourth of the test tube, time will be 58 minutes. |
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| 393. |
While examining the mitotic stage in a tissue, one finds some cells with 16 chromosomes and some with 32 chromosomes. What possible reasons could you assign to this difference in chromosomer number. Do you think cells with 16 chromosomes could have arisen from cells with 32 chromosomes or vice-versa ? |
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Answer» Such a condition may arise in case of a mosaic or mosaicism, which denotes presseve of two or more populations of cells with different genotypes in one individual. it can result from various mechanisms including non-disjunction, anaphase lagging and endoreplication. It may also result from a mutation during development which is propagated to only a subset of the adult cells. In this case, cells with 16 chromosomes could have arisen from cells with 32 chromosomes. |
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| 394. |
A cell has 32 chromosomes. It undergoes mitotic division. What will be the chromosme number `(n)` during metaphase ? What would be the DNA content (C) during anaphase ? |
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Answer» The mitotic cell divison occurs in somatic cells of an organism. The chromosome number in the daughter cells remain same as that of the parent (dividing) cell, so even at metaphase or anaphase, the chromosome number does not change. The DNA content gets double at the synthetic phase of interphase and gets divided at anaphase but the chromosome number remains same. |
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| 395. |
While working in a lab, a student forgot to add colchicine while karyotyping through blood culture technique. Then what will happenA. Mitosis will be arrested at metaphaseB. Chromosomal division will continue and each chromosme will have four armsC. Chromosomal divison will continueD. Mitosis will be arrested at telophase |
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Answer» Correct Answer - c In absence of colchicines mitotic division will be continued in normal way. |
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| 396. |
The number of DNA in chromosome at `G_(2)` stage of cell cycleA. OneB. Two chromatids and two centromeresC. Four time the number of chromosomes and twice the amount of DNAD. Eight |
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Answer» Correct Answer - b The duplication of DNA takes place in S stage of interphase after that cell reaches in `G_(2)` phase will be two. |
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| 397. |
Choose the correctly matched pairs and correct option (a) Leptotene - chromosomes become invisible (b) Zygotene - pairing of homologous chromosomes `(c)`Pachytene - Dissolution of synaptonemal complex takes place (d) Diplotene - Bivalent chromosomes appear as tetrads (e) Diakinesis - Terminalisation of chiasmata takes placeA. a, b correctB. a,d correctC. b,e correctD. b,c correct |
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Answer» Correct Answer - C Zygotene- pairing of homologous chromosomes Diakinesis- terminalisation of chiasmata takes place. |
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| 398. |
Assertion: Cell growth results in disturbing the ratio between the nucleus and cytoplasm. Reason: Mitosis helps the cell to restore the nucleocytoplasmic ratio: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 The growth of multicellular organisms is due to mitosis. Cells functions are controlled by nucleus. The size of nucleus does not change, but cytoplasm increases during cell growth. Increase in size distrub the nucleoytoplasmic ratio. This ratio is restored to efficient level through cell division. |
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| 399. |
Cell divison can not be stopped in which phase of the cell cycle.A. `G_(1)`-phaseB. `G_(2)`-phaseC. S-phaseD. {rp[jase |
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Answer» Correct Answer - c The check points are basically present in the interphase. |
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| 400. |
Select the correct option with respect to mitosis.A. Golgi complex and endoplasmic reticulum are still visible at the end of prophaseB. Chromatids separate but remain in the centre of cell in anaphaseC. Chromosomes move to spindle equator and get aligned along equatorial plate in metaphaseD. Chromatids start moving towards opposite poles in telophase. |
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Answer» Correct Answer - C Gogli complex and endoplasmic reticulum are not visible at the end of prophse . Chromatids separate in anaphase. Chromosomes move to spindle equator and get aligned along equatoral plate in metaphase. Chromatids start moving towards opposite poles in anaphase. |
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