InterviewSolution
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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.
| 251. |
In which phase proteins for spindle fibre formation are synthesized.A. `G_(1)` phaseB. `G_(2)` phaseC. S phaseD. Anaphase |
| Answer» Correct Answer - a | |
| 252. |
Four chromatids and two centromeres which are homologous occurs inA. ZygoteneB. DiploteneC. DiakinesisD. Pachytene |
| Answer» Correct Answer - a | |
| 253. |
Bulk of histone proteins are synthesized inA. `G_(1)` phaseB. `G_(2)` phaseC. S phaseD. `G_(0)` phase |
| Answer» Correct Answer - C | |
| 254. |
The complex formed by a pair of synapsed homologous chromosomes is calledA. BivalentB. AxonemeC. Equatorial plateD. kinetochore |
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Answer» Correct Answer - A The complex formed by a pair os synapsed homologous chromosomes is called bivalent. |
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| 255. |
Assertion: Interphase is resting stage. Reason: The interphase cell is metabolically inactive.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 - c Previousl interphase is called resting stage because there is no apparent activity related to cell division. The interphase cell is metaboliclityquite active. Interphase consist of three subsphases `(G_(2),G_(2) "and" S)`. Synthesis of ENA occurs in S phase. `G_(1)` is the period between the end of mitosis and the start of S phase. `G_(2)` is the interval between S phase and start of mitosis. As the synthesis of DNA occurs in S phase so it is considred as metabolically active phase. |
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| 256. |
If gametes are produced after reduction division, they are termed asA. coenogmatesB. mitogametesC. pseudogametesD. meiogametes. |
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Answer» Correct Answer - D Reduction divison is known as meiosis, gametes foremed from this divison are known as meiogametes. |
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| 257. |
what happens during metaphase II? |
| Answer» During metaphase II, the chromosomes align themselves at the equator. The microtubule from the spindle extends towards the equator and attaches at the kinetochore of the chromatids. | |
| 258. |
What is cell division ? |
| Answer» Cell division is a process in which a single parent cell divides into two daughter cells. | |
| 259. |
Which cell division is responsible for producing gametes essential for sexual reproduction ? |
| Answer» Correct Answer - Meiosis | |
| 260. |
E. coli /Bacteria does not show alternation of generations because of absence ofA. nucleusB. chromosomesC. reduction divisionD. syngamy |
| Answer» Correct Answer - C | |
| 261. |
Which of the following option gives the correct sequence of events during mitosisA. Condensation `rarr` nuclear membrane disassembly `rarr` crossing over `rarr` segregation `rarr` telophaseB. Condensation `rarr` nuclear membrane disassembly `rarr` arrangement at equator `rarr` centromere division `rarr` segregation `rarr` telophaseC. Condensation `rarr` crossing over `rarr` nuclear membrane disassembly `rarr` segregation `rarr` telophaseD. Condensation `rarr` arrangement at equator `rarr` centromere division `rarr` segregation `rarr` telophase |
| Answer» Correct Answer - B | |
| 262. |
Starting of metaphase is marked byA. Complete disintegration of nuclear membraneB. Disppearance of ER, GB , nucleolus and nuclear envelopeC. Initiated of condensation of chromosomal materialD. Chromosomes aligns at the equatorial plate |
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Answer» Correct Answer - A Starting of matephase is marked by complete disintegration of nuclear membrane. |
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| 263. |
Number of chromatids per chromosome at metaphase isA. Two each in mitosis and meiosisB. Two in mitosis and one in meiosisC. Two in mitosis and four in meiosisD. One in mitosis and two in meiosis |
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Answer» Correct Answer - B Number of chromatids at metaphase are two each in mitosis and meiosis. |
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| 264. |
The two chromatids of a metaphase chromosome representA. Homologous chromosome of a diploid setB. Replicated chromosomes to be separated at anaphaseC. Nonhomologous chromosomes joined at the centromereD. Maternal and paternal chromosomes joined at the centromere |
| Answer» Correct Answer - B | |
| 265. |
Which stages of cell division do the following figures A and B represent respectively A. Prophase-anaphaseB. Metaphase-TelophaseC. Telophase-MetaphaseD. Late Anaphase-Prophase |
| Answer» Correct Answer - d | |
| 266. |
Which stages of cell division do the following figures A and B represent respectively A. Prophase - AnaphaseB. Metaphase - TelophaseC. Telophase - MetaphaseD. Late Anaphase - Prophase |
| Answer» Correct Answer - D | |
| 267. |
Which stages of cell division do the following figures A and B represent respectively A. Metaphase-TelophaseB. Telophase-MetaphaseC. Late Anaphase-ProphaseD. prophase-Anaphase |
| Answer» Correct Answer - C | |
| 268. |
Which stages of cell division do the following figures A and B represent respectively A. A-Prophase B- AnaphaseB. A-metaphase, B-telophaseC. A-telophase, B-metaphaseD. A-Late anaphase, B-prophase |
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Answer» Correct Answer - D Microtubules are mainly composed of tubules protein. These are found only in eukaryotic cellular structures like cilia, flagella, centriole, basal body, spindle fibre, etc. |
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| 269. |
Centriole replicates duringA. MetaphaseB. Late prophaseC. `G_(1)` of I phaseD. S-phase of I phase |
| Answer» Correct Answer - D | |
| 270. |
In meiosis, chromatids separate atA. Anaphase IB. Anaphase IIC. DiakinesisD. Diplotene |
| Answer» Correct Answer - B | |
| 271. |
Nucleoprotein complex formation stage isA. PachyteneB. ZygoteneC. DiploteneD. Leptotene |
| Answer» Correct Answer - B | |
| 272. |
Synaptonemal complexes is a nucleoprotein structure. It is visible or found from-A. leptotene through diploteneB. pachytene through diploteneC. zygotene through pachyteneD. diplotene through metaphase |
| Answer» Correct Answer - C | |
| 273. |
In which stage of meiosis crossing over takes placeA. ProphaseB. MetaphaseC. AnaphaseD. Prophase I |
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Answer» Correct Answer - D Crossing over takes place in prophase I. |
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| 274. |
Mechanism of genetic continuity in mitosis is due toA. segregation of maternal and paternal chromosomesB. duplication of DNAC. crossing overD. halving of chromosomes |
| Answer» Correct Answer - B | |
| 275. |
Division of cytoplasm agter completion of nuclear division is celledA. CytokinesisB. CytomixisC. KaryokinesisD. Apomixis |
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Answer» Correct Answer - A Division of cytoplasm after completion of nuclear divisionis called cytokinesis. |
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| 276. |
Mitochondria and plastids have their own DNA (genetic material). What is known about their fate during division like mitosis ? |
| Answer» The DNA present in mitochondria and chloroplast is extrachromosomal DNA. It has nothing to do with the nuclear divisions. In mitosis, only DNA takes part | |
| 277. |
Which division maintains genetic similarly?A. MitosisB. AmitosisC. Reduction divisionD. Meiosis |
| Answer» Correct Answer - A | |
| 278. |
Assertion: The duration of cell cycle can vary from organism to organism and also from cell type to cell type Reason: Human cells in culture divided once in approximately 24 hours.A. If both assertion and reason are true and the reason is the correct explanation of the assertion.B. If both assertion and reason are true but reason is not the correct explanation of the 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 duration of cell cycle vary from organism to organism and also from cell type to cell type. Human cell in nature divides once in approximately 24 hours. |
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| 279. |
If mitotic division is restricted in `G_(1)` phase of cell, the condition is known asA. `G_(2)`-phaseB. S-phaseC. `G_(0)`-phaseD. M-phase |
| Answer» Correct Answer - C | |
| 280. |
The decision for cell division is takenA. `G_(1)`B. SC. `G_(2)`D. Not known |
| Answer» Correct Answer - A | |
| 281. |
Phase of cell cycle when DNA polymerase is activeA. `G_(1)`B. SC. `G_(2)`D. M |
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Answer» Correct Answer - B Phase of cell cycle when DNA polymerase is active S. |
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| 282. |
The active phase, also called metabolic or energetic phase with most cytogenetic activity isA. lnterphaseB. M-PhaseC. MeiosisD. Pachytene |
| Answer» Correct Answer - A | |
| 283. |
What is not seen during mitosis in somatic cellsA. Spindle fibresB. Chromosome movementC. Disappearance of nucleolusD. Synapsis |
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Answer» Correct Answer - d Synapsis is the pairing of homologous chromosomes during zygotene stage of prophase I of meiotic division. I. The homologous chromosomes come from the mother and father. |
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| 284. |
Calcium dependent kinasses can controlA. Cell cycle activitiesB. DNA replicationC. Cell surface receptionsD. Membrane structure |
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Answer» Correct Answer - a Colcium Dependent Kinases (CDKs) have the ability to control cell cycle activites during cell division. |
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| 285. |
The number of chromosmes after 1 phase of meiotic division in reduction division .A. Remain unchangedB. Become doubledC. Become halvedD. None of the above |
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Answer» Correct Answer - c Because first phase of meiosis includes reduction division while second phase exhibits mitotic divisions. |
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| 286. |
Syncytium formation takes place ifA. Cytokinesis is not followed by karyokinesisB. Karyokinesis does not occurC. Karyokinesis is not followed by cytokinesisD. Both karyokinesis and cytokinesis are prevented |
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Answer» Correct Answer - C Syncytium formation takes place if karyokinesis is not followed by cytokinesis. |
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| 287. |
The most cytogenic activity occurs duringA. InterphaseB. telophaseC. prophaseD. anaphase |
| Answer» Correct Answer - A | |
| 288. |
The number of mitotic cell division required to produce 256 cells from single cell would beA. 10B. 12C. 6D. 8 |
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Answer» Correct Answer - d Mitotic cells division is equational division where a mother cell divides to form 2 daughter cells. So to produce 256 cells from a single cell, 8 mitotic divisions will occur which can be represented as `1rarr2rarr4rarr8rarr16rarr64rarr128rarr256`. |
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| 289. |
Synthesis of RNA takes place in which phase of the cell cycle?A. S-phaseB. M-phaseC. `G_(1) and G_(2)`-phaseD. None of these |
| Answer» Correct Answer - C | |
| 290. |
Synthesis of histone proteins occurs inA. `G_(1)` phaseB. interphaseC. anaphaseD. `G_(0)` phase. |
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Answer» Correct Answer - B Replication of DNA along with the synthesis of nuclear proteins such as the histones occur during 5 phase of interphase. |
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| 291. |
Mitosis result in producing two cell which are similar to each other. What would be the consequence if each of the following irregularities occur during mistosis ? (a) Nuclear membrane fails to disintegrate (b) Duplication of DNA does not occur (c) Centromeres do not divide (d) Cytokinesis does not occur |
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Answer» (a) If nuclear membrane fails to disintegrate, the spindle fibres would not be able to reach chromosomes and they would not move towards opposite poles of the cell. In certain protoxoans, such as Amoeba, the spindle is formed within the nucleus and this is called intranuclear mitosis or pre-mitosis. (b) If DNA duplication does not occur than cell might not be able to supose S-phase of cell-cycle as no chromosome formation will take place, and will not be able to enter M-(mitotic phase) or if in case it enters mitosis the cycle will cease. (c) If the centromeres do not divide, one of the daughter cell will receive a complete pair of chromosomes and other cell would not get any of them. This may result in trisomy. (d) If cytokinesis does not occur, then multinucleate condition called coenocyte, syncytium is produced, as in Rhizopus and Vaucheria, etc. |
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| 292. |
Which is not true for anaphaseA. Golgi body and ER are reformedB. Chromosomes move to opposite polesC. Spindle poles move farther apartD. Centromeres split and chromatids separate |
| Answer» Correct Answer - a | |
| 293. |
What happens during leptotone? |
| Answer» Chromosomes become gradually visible under the light microscope. The compaction of chromosomes continues throughout leptotone. | |
| 294. |
Most of the histone production during cell cycle occurs inA. `G_(0)` phaseB. `G_(1)` phaseC. S phaseD. `G_(2)` phase |
| Answer» Correct Answer - C | |
| 295. |
What are homologous chromosomes? |
| Answer» Two chromosomes which are similar in size, structure and form are called homologous chromosomes. | |
| 296. |
Mitosis occurs inA. Haploid individualsB. Diploid individualsC. Both a and bD. In bacteria only |
| Answer» Correct Answer - c | |
| 297. |
What is synapsis ? |
| Answer» The homologous chromosomes during zygotene pair up. They lie side by side in pairs and his pairing is called synapsis. | |
| 298. |
Mitosis occurs inA. Meristematic cellsB. Undifferentiated germ cellsC. Somatic cellsD. More than one option is correct |
| Answer» Correct Answer - D | |
| 299. |
What is crossing over ? |
| Answer» The exchange of genetic material (DNA) between non-sister chromatids of the homologous chromosomes is known as crossing over. | |
| 300. |
The first phase of mitosis which follows interphase isA. MetaphaseB. ProphaseC. TelophaseD. Anaphase |
| Answer» Correct Answer - B | |