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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.
| 401. |
Spindle fibres are attached to chromosomes in the region ofA. CentrosomeB. ChromomereC. ChromonemaD. Kinetochore |
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Answer» Correct Answer - D Spindle fibres are attached to chromosomes in the region of kinetochore. |
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| 402. |
If 2n=8, what shall be the number of chromatids in each daughter cell after meiosis-I?A. fourB. sixteenC. twoD. eight |
| Answer» Correct Answer - D | |
| 403. |
Identify the wrong statement about meiosis.A. Pairing of homologous chromosomersB. Four haploid cells are formedC. At the end of meiosis the number of chromosomes are reduced to halfD. Two cycle of DNA replication occurs. |
| Answer» Two cycle of DNA replication does not occur in meiosis. Other options (a) (b) and (c) define the meiotic cell division. | |
| 404. |
Select the correct statement about `G_(1)` phase.A. cell is metabolically inactiveB. DNA in the cell does not replicateC. it is not a phase of synthesis of macromoleculesD. cell stops growing. |
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Answer» `G_(1)` phase means gap 1 phase. It is the interval between mitosis and initiation of DNA replication. The cell is metabolically active and continuously grows but does not replicate the DNA content. The cell also synthesizes proteins that are required for DNA replication. Rest of the options are not characteristics of `G_(1)` phase. |
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| 405. |
It is difficult to observe individual chromosomes during interphase becauseA. the DNA has not been replicated yetB. they have uncoiled to form long, thin strandsC. homologous chromosomes do not pair up until division startsD. the spindle must move them to the metaphase plate before they becom visible. |
| Answer» Correct Answer - B | |
| 406. |
Which of the following processes involve(s) mitosis? I. production of new sperms cells. II. Propagation of carrot plants by underground roots. III. Deelopment of the zygote into an embryo. IV. Replacement of worn-out muscle tissue. Choose the option with correct statement(s).A. Only IIB. Only IIIC. II, III and IVD. I,II,III and IV |
| Answer» Correct Answer - C | |
| 407. |
Liver cells are highly specialised,but when the liver cell is damaged or parts of it are removed surgically, tissue grows. Liver cells fall into which category of cells?A. cells permanently locked in `G_(0)`B. cell subjected to continual removalC. cells that can be induced to enter the `G_(1)`-phaseD. Can not be determined from the information given |
| Answer» Correct Answer - C | |
| 408. |
Which of the following is part of mitosis in cells of seed plants ?A. CentriolesB. AstersC. SpindlesD. Cleavage furrows |
| Answer» Correct Answer - C | |
| 409. |
What is the correct sequence of the steps given here? Also work out the process depicted in the steps (i) Homologous chromosomes move forward opposite poles of the cell: chromatids do not separte II. Chromosomes gather together at the two poles of the cell and the nuclear membranes reform III. Homologous chromosomes pair and exchange segments IV. Homologous chromosomes allign on a central plate V. the haploid cells separte completely .A. The correct sequence is `IIIrarrIVrarrIrarrIIrarrV` and the process is meiosis-IB. The correct sequence is `IIrarrIrarrVrarrIVrarrIII` and the process is mitosisC. The correct sequence is `IVrarrIrarrIIIrarrIIrarrV` and the process is meiosis-ID. The correct sequence is `IIrarrVrarrIVrarrIrarrII` and the process is mitosis |
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Answer» Correct Answer - a III-Prophase IV-Metaphase I-Anaphase (I),II-Telphase I, V-Telophase III |
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| 410. |
Can there be mitosis without DNA replication in S phase? |
| Answer» Mitotic cell division cannot take place without DNA replication in S phase. Two important events take place during S phase – one is the synthesis or duplication of DNA and the other is the duplication of the centriole. DNA duplication is important as it maintains the chromosome number in the daughter cells. Mitosis is an equational division. Therefore, the duplication of DNA is an important step. | |
| 411. |
Can there be DNA replication without cell division? |
| Answer» There can be DNA replication without cell division. During cell division, the parent cell gets divided into two daughter cells. However, if there is a repeated replication of DNA without any cell division, then this DNA will keep accumulating inside the cell. This would increase the volume of the cell nucleus, thereby causing cell expansion. An example of DNA duplication without cell division is commonly observed in the salivary glands of Drosophila. The chromosome undergoing repeated DNA duplication is known as polytene chromosome. | |
| 412. |
What is the average cell cycle span for a mammalian cell? |
| Answer» The average cell cycle span for a mammalian cell is approximately 24 hours. | |
| 413. |
Spindle fibres arise fromA. CentrioleB. CentromereC. NucleusD. Mitochondria |
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Answer» Correct Answer - A Spindle fibre arise from centriole/centrosome. |
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| 414. |
Centriole replicates duringA. InterphaseB. Early prophaseC. Late prophaseD. Late telophase |
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Answer» Correct Answer - A Centriole replicates during interphase /S-phase. |
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| 415. |
`G_(1), S and G_(2)` are stages ofA. InterphaseB. ProphaseC. MetaphaseD. Anaphase |
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Answer» Correct Answer - A `G_(1)` ,S and `G_(2)` are stage of interphase |
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| 416. |
Number of mitotic divisions required to produce 128 cells from a single cell isA. 7B. 14C. 16D. 32 |
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Answer» Correct Answer - A 7 mitotic divisions reuired to produce 128cells from a single cell. |
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| 417. |
How many mitotic divisions are needed for a single cell to make 128cellsA. 7B. 14C. 28D. 32 |
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Answer» Correct Answer - a A single mitotic divisions results in the production of two cells from a single one. |
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| 418. |
How many mitotic divisions are needed for a single cell to make 128 cellsA. 28B. 32C. 127D. 14 |
| Answer» Correct Answer - C | |
| 419. |
Which of the folliwng structure will not be common to mitotic cell of a higher plantA. CentrioleB. Spindle fibreC. Cell plateD. Centromere |
| Answer» Correct Answer - A | |
| 420. |
Mitotic apparatus is a temporary structure whichA. disappears in prophaseB. reappears in telophaseC. persists in cytokinesis of plant cellsD. all are correct |
| Answer» Correct Answer - C | |
| 421. |
Which of the folliwng structure will not be common to mitotic cell of a higher plantA. Cell plateB. CentromereC. CentrioleD. Spindle fibre |
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Answer» Correct Answer - c Centrioles are organelles important in spindle formation during nuclear division. These are found commonly in most animal cells and some lower plant cells. |
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| 422. |
Synapsis occurs betweenA. spindle fibres and centromeresB. Mrna and ribosomesC. a male and female gametesD. two homologous chromosomes |
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Answer» Correct Answer - D Synapsis occurs between two homologous chromosomes. |
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| 423. |
During cell cycle, RNA and protein are synthesised inA. S-phaseB. `G_(1)`-phaseC. `G_(2)`-phaseD. Both A and B |
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Answer» Correct Answer - B During cell cycle, RNA and proteins are synthesised in `G_(1)` -phase. |
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| 424. |
Significance of meiosis inA. Reduction of chromosome number to one halfB. Maintaining constancy of chromosome number during sexual reproductionC. Production of genetic variabilityD. All of above |
| Answer» Correct Answer - D | |
| 425. |
The significance of meiosis lies inA. Maintaining constancy in the number of chromosomes in an organismB. Production of genetic varaiability in the population of speciesC. Reduction of diploid number of chromosomes to haploidD. All of the above |
| Answer» Correct Answer - D | |
| 426. |
Non -sister chromatids exchange segments duringA. LeptoteneB. DiploteneC. ZygoteneD. Pachytene |
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Answer» Correct Answer - D Non-sister chromatids exchange segments during pachytene. |
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| 427. |
Significance of meiosis inA. Production of genetic variabilityB. Maintaining constancy of chromosome number during sexual reproductionC. Reduction of chromosome number to one halfD. All of the above |
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Answer» Correct Answer - D Significance of meiosis lies in production of genetic variability , maintaining constancy of chromosomes number during sexual reproduction and reduction of chromosomes number to one half. |
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| 428. |
Given below is schematic break-up of phases of cell cycle. Which one is correct matching ? A. A-cytokinesisB. B-MetaphaseC. C-KaryokinesisD. D-Synthetic phase |
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Answer» Correct Answer - D A-Karyokinesis, B-Anaphase, C-Cytokinesis and D-Synthetic phase. |
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| 429. |
In which of the following stages, a choromosome is minimum coiled?A. interphaseB. MetaphaseC. ProphaseD. anaphase. |
| Answer» Correct Answer - A | |
| 430. |
The DNA content of individual cells and the number of cells in each phase of a cell cycle" can be determined using flow cytometry. Which of the following combinations of "phase of a cell cycle and its corresponding DNA content" can be considered normal? (i) Diploid cells found in the `G_(0)` or `G_(1)` phase. (ii) Cells with twice the normal DNA content in the early M phase. (iii) Cells with twice the normal DNA content in the `G_(2)` phase.A. i and iiB. ii and iiiC. iii and ivD. i,ii,iii and iv |
| Answer» Correct Answer - D | |
| 431. |
The second spindle formed in Merosis-II is formedA. at right angle to first spindleB. parallel to first spindleC. oblique to the axisD. at any site in the cell |
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Answer» Correct Answer - A One spindle is formed in meiosis I and two spindles at right angle to previous spindle in metaphase II of meiosis II. So total number of spindles is 3. |
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| 432. |
A bacterium divides every `35` minutes. If a culture containing `10^(5)` cells/ml is grown for `175` minutes. What will be the cell concentration / ml after `175` minutesA. `32 xx 10^(5)` cellsB. `5 xx 10^(5)` cellsC. `35 xx 10^(5)` cellsD. `175 xx 10^(5)` cells |
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Answer» Correct Answer - A `n=(175)/(35)=5 " mts. "2^(n)=2^(5)=32` In the starting total number of cells were `10^(5)`. Therefore, answer is `32xx10^(5)` |
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| 433. |
Number of spindle apparatus formed during meiosis isA. 3B. 2C. 1D. 4 |
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Answer» Correct Answer - A One spindle is formed in meiosis I and two spindles at right angle to previous spindle in metaphase II of meiosis II. So total number of spindles is 3. |
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| 434. |
Which one of the following forms the spindle apparatus during cell divisionA. ChromosomeB. CentrosomeC. RibosomeD. Chondriosome |
| Answer» Correct Answer - b | |
| 435. |
The term "mitosis" was proposed byA. FlemmingB. FarmerC. MooreD. Boveri |
| Answer» Correct Answer - a | |
| 436. |
The term "mitosis" was proposed byA. Walter FlemmingB. StrasburgerC. HertwigD. Moore |
| Answer» Correct Answer - A | |
| 437. |
When synapsis is complete all along the chromosomes, the cell is said to have entered a stage calledA. ZygoteneB. PachyteneC. DiploteneD. Diakinesis |
| Answer» Correct Answer - B | |
| 438. |
Meiosis is found atA. Shoot apexB. Reproductive partC. Leaves budD. Vegetative parts |
| Answer» Correct Answer - b | |
| 439. |
Recombination nodules which mediate for chromosome recombination occur duringA. ZygoteneB. DiploteneC. DiakinesisD. Pachytene |
| Answer» Correct Answer - D | |
| 440. |
Crossing over occurs duringA. PachyteneB. DiploteneC. DiakinesisD. Zygotene |
| Answer» Correct Answer - A | |
| 441. |
The given diagram shows a cell Which of the following statement related to the image is not correct.A. The nuclear envelope is disappearingB. The cell furrow is formingC. It is an animal cellD. It is in telophase |
| Answer» Correct Answer - a | |
| 442. |
Terminalization is related toA. DiakinesisB. MeiosisC. MitosisD. Diplotene |
| Answer» Correct Answer - A | |
| 443. |
Meiosis involvesA. One nuclear division and one chromosome divisionB. Two nuclear divisions and one chromosome divisionC. One nuclear division and two chromosome divisionsD. Two nuclear divisions and two chromosome divisions |
| Answer» Correct Answer - B | |
| 444. |
Number of chromosomes in the primary oocyte isA. Same as that of secondary oocyteB. Half as that of secondary oocyteC. Double as that of secondary oocyteD. Same as that of ovum |
| Answer» Correct Answer - C | |
| 445. |
Spindle fibers attach on toA. Kinetosome of the chromosomeB. Telomere of the chromosomeC. Kinetochore of the chromosomeD. Centromere of the chromosome |
| Answer» Correct Answer - C | |
| 446. |
The region of the attachment of chromosome to spindle fibers is calledA. CentromereB. CentrioleC. ChromonemataD. Centrosome |
| Answer» Correct Answer - A | |
| 447. |
How many meiotic divisions are essential in formation of 100 seeds in Cyperaceae family :-A. 400B. 125C. 200D. 25 |
| Answer» Correct Answer - C | |
| 448. |
Mitosis in animal cell isA. AnastralB. AmphiastralC. Pre-mitosis,acetricD. Eumitosis acetric |
| Answer» Correct Answer - B | |
| 449. |
Anaphase promoting complex (APC) is a protein degradation machinery necessary for proper mitosis of animal cells. If APC is defective in a human cell, which of the following is expected to occurA. Chromosomes will be fragmentedB. Chromosomes will not segregateC. Recombination of chromosome arms will occurD. Chromsomes will not condense |
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Answer» Correct Answer - B Anaphase promoting complex (APC) is a protein degraton machinery necessary for proper mitosis of animals cells. If APC is defective in a human cell,then chromosomes will not segregate. |
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| 450. |
Mitosis is found inA. Lower animalsB. Higher animalsC. All plantsD. All living organisms |
| Answer» Correct Answer - D | |