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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. |
Example of bioluminescent organism isA. ParamoeciumB. GiardiaC. EntamoebaD. Noctiluca |
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Answer» Correct Answer - D Example of bioluminescent protozoan is Noctiluca. |
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| 352. |
Virus can multiplies inA. Host cell or living cellB. DetritusC. Culture media on AgarD. All of the above |
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Answer» Correct Answer - A Virus can multiply in Host cell/living cell. |
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| 353. |
The structure producing basidium in basidiomycetes is formed by the fusion ofA. Two vegetative cellsB. Two male gametesC. Two female gametesD. Male and female gametes |
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Answer» Correct Answer - A The struture producing basidum in basidiomycetes is formed by the fusion of two vegetative cells. |
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| 354. |
How will you differentiate an ascus from a basidium. |
| Answer» The main differences between an ascus and a basidium are - (i) Ascus is formed in Ascomycetes whereas basidia are formed in basidiomycetes. (ii) Ascus encloses 8 (sometimes less or more) ascospores which are borne endogenously. The basidium produces 4 basidiospores which are borne exogenously. (iii) The basidiospores are attached to basidia by means of sterigma whereas ascospores are filled inside the ascus. | |
| 355. |
How do the plants and animals differ in growth ? |
| Answer» In plants, growth occurs at specific growing points and continues throughout life. In animals, growth occurs proportionately in all parts and stops at certain size. | |
| 356. |
What are bacteriophages ? |
| Answer» Viruses that attack bacteria. | |
| 357. |
Assertion : Endomycorrhiza of forest trees contribute to the efficient nutrient cycling in tropical forest ecosystem. Reason : The fungi that form mycorrhizal associations with plants make nutrient ions available to them.A. If both A and R are true and R is the correct explanation of A.B. If both A and R are true but R is not the correct explanation of AC. If A is true but R is false.D. If both A and R are false |
| Answer» Correct Answer - A | |
| 358. |
Which part of the human brain is largestA. CerebrumB. CerebellumC. ThalamusD. Medulla |
| Answer» Correct Answer - A | |
| 359. |
In an ecosystem primary consumers areA. ChemoautotrophsB. CarnivoresC. HerbivoresD. Photoautotrophs |
| Answer» Correct Answer - C | |
| 360. |
Rate of photosynthesis is independent ofA. Quality of lightB. Intensity of lightC. Duration of lightD. Temperature |
| Answer» Correct Answer - C | |
| 361. |
The wavelength of light most absorbed during photosynthesis isA. 700 nmB. 660 nmC. 550 umD. 440 nm |
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Answer» Correct Answer - B The wavelength of light most absorbed during photosynthesis is 660 nm. |
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| 362. |
Sexual reproductive structures in lichens are produced byA. AlgaeB. FungiC. Both algae and fungiD. Lichens remain vegetative and do not reproduce. |
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Answer» Correct Answer - B Sexual reproductive structures in lichens are produced by Fungi. |
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| 363. |
Golgi apparatus develops fromA. Endoplasmic reticulumB. LysosomeC. MitochondriaD. Cell membrane |
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Answer» Correct Answer - A Golgi apparatus develops from endoplasmic reticulum. |
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| 364. |
What is common among the protozoans ?A. PseudopodiaB. Contractile vacuoleC. Being eukaryoticD. All of the above |
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Answer» Correct Answer - C Being eukaryotic is common among the protozoans. |
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| 365. |
In fluid mosaic model of plasma membrane ,A. Upper layer is non-polar and hydrophobeB. Upper layer is polar and hydrophobicC. Phospholipids produce a bilayer in the middleD. Proteins from the middle layer |
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Answer» Correct Answer - B Fluid mosaic mode of plasma membrane purposes that upper layer is polar and hydrophobic. |
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| 366. |
The beautiful diatoms are placed underA. ChrysophytesB. DinoflagellatesC. EuglenoidsD. Slime Moulds. |
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Answer» Correct Answer - A The beautiful diatoms and desmids are placed under Chryosphytes. |
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| 367. |
Lipid molecules of plasma membrane are arrangedA. AlternatelyB. In seriesC. ParallelD. Scattered |
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Answer» Correct Answer - C Lipid molecules of plasma membrane are arranged parallel. |
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| 368. |
Name the three kinds of genetic recombinations that occur in bacteria. |
| Answer» Conjugation, Transformation and Transduction. | |
| 369. |
In moss capsule, the middle sterile part is calledA. ApophysisB. ColumellaC. AnnulusD. Peristome |
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Answer» Correct Answer - B In moss capsule, the middle sterile part is called columella. |
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| 370. |
Highest number of enzymes occur inA. ChloroplastB. PeroxisomeC. MitochondriaD. Lysosome |
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Answer» Correct Answer - C Highest number of enzymes occur in mitochondria. |
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| 371. |
Cellular organelles involved in energy transformation areA. Mitochondria and chloroplastsB. Chromoplasts and leucoplastsC. Mitochondria and chromoplastsD. Chloroplasts and leucoplasts |
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Answer» Correct Answer - A Cellular organelles involved in energy transformation are mitochondria and chloroplasts. |
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| 372. |
Centrosome is absent inA. Cells of higher plantsB. Cells of lower plantsC. Cell of higher animalsD. Cells of lower animals |
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Answer» Correct Answer - A Centrosome is absent in cells of higher plants. |
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| 373. |
What are isotonic solutions? |
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Answer» Isotonic solutions : Solutions having same osmotic pressure at a given temperature are called isotonic solutions. e.g. : Blood is isotonic with 0.9% (W/v) NaCl [Saline] |
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| 374. |
What is an ideal solution? |
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Answer» A solution of two or more components which obeys Raoult's law at all concentrations and at all temperatures is called ideal solution. In ideal solution there should not be any association between solute and solvent, (i.e.) no chemical interaction between solute and solvent of solution. Ex : The following mixtures form ideal solutions. ● Benzene + Toluene ● n – hexane + n – heptane ● ethyl bromide + ethyl iodide |
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| 375. |
Discuss the characteristics of physical adsorption. |
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Answer» Characteristics of physical adsorption : → Lack of specificity : Physisorption is not specific. In this adsorption the given surface of adsorbent doesnot show any preference for a particular gas as the forces present are vanderwaal's forces (Universal). → Nature of adsorbate : The amount of gas adsorbed by a solid depends on the nature of gas. → Easily liquefiable gases are readily adsorbed. → The gas with high critical temperature value is easily liquefied and gets readily adsorbed. → Reversible Nature : Physical adsorption is reversible and occurs rapidly at low temperatures. → Surface area of adsorbent : The extent of adsorption increase with increase in surface area of adsorbent. → Finely divided metals and porous substances having large surface area are good adsorbents. → Enthalpy of adsorption : Physisorption is an exothermic process but the enthalpy of adsorption is low (20 - 40KJ/mole). This is due to the presence of Vander waal's forces. |
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| 376. |
Ustilago is a member of kingdomA. MoneraB. FungiC. PlantaeD. Animalia |
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Answer» Correct Answer - B Ustilago is a member of kingdom fungi. |
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| 377. |
Phycobiont and mycobiont together constituteA. PhycomycetesB. LichenC. PhycobilinsD. Mycorrhiza |
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Answer» Correct Answer - B Phycobiont and mycobiont together constitue lichen. |
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| 378. |
In the five - kingdom classification Chlamydomonas and Chlorella have been included inA. AlgaeB. ProtistaC. PlantaeD. Monera |
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Answer» Correct Answer - B In the five-Kingdom classification, Chlamydomonas and Chlorella have been included in Protista. |
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| 379. |
Sole member of kingdom monera areA. BacteriaB. FungiC. B.G.AD. Eubacteria |
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Answer» Correct Answer - A Sole member of kingdom Monera are Bacteria. |
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| 380. |
The imperfect fungi which are decomposers of litter and help in mineral cycling belong to:A. BasidiomycetesB. PhycomycetesC. AscomycetesD. Deuteromycetes |
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Answer» Correct Answer - D The imperfect fungi which are decompsers of litter and help in mineral cycling belong to Deuteromycetes. |
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| 381. |
Assertion: `E^(@)` for `Mn^(3+)//Mn^(2+)` is more positive than `Cr^(3+)//Cr^(2+)` Reason: The third ionisation energy of `Mn` is larger than that of `Cr`.A. If both assertion and reason are true and reason is the correct explanation of assertionB. If the assertion and reason are true but reason is not the correct explanation of assertion.C. If assertion is true but reason is false.D. If assertion is false but reason is true. |
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Answer» Correct Answer - B It is known that the value of `E^(@)` becomes more negative down the series. As the chromium is present below in electrochemical series than `Mn`, so `Mn` has more positive `E^(@)` value than `Cr`. `Mn rarr 3d^(5)4s^(2)" "Mn^(2+)rarr 3d^(5)4s^(0)` `Cr rarr 3d^(5)4s^(1),Cr^(2+) rarr 3d^(4)4s^(0)` For elimination of one electron from `Mn^(2+)` more energy is required due to its stabel configuration . That is why third Ionisation energy of `Mn` is larger than `Cr`. |
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| 382. |
Assertion: NO is an acidic oxide while `CrO_(3)` is a basic oxide. Reason: Oxides of metals are generally basic and oxides of non-metals are generally acidic.A. If both assertion and reason are true and reason is the correct explanation of assertionB. If the assertion and reason are true but reason is not the correct explanation of assertion.C. If assertion is true but reason is false.D. If assertion is false but reason is true. |
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Answer» Correct Answer - D Assertion: NO is a neutral oxide while `CrO_(3)` is an acidic oxide. |
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| 383. |
Which of the following sequence correctly represents the decreasing acidic nature of oxides?A. `Li_(2)OgtBeOgtB_(2)O_(3)gtCO_(2)gtN_(2)O_(3)`B. `N_(2)O_(3)gtCO_(2)gtB_(2)O_(3)gtBeOgtLi_(2)O`C. `CO_(2)gtN_(2)O_(3)gtB_(2)O_(3)gtBeOgtLi_(2)O`D. `B_(2)O_(3)gtCO_(2)gtN_(2)O_(3)gtLi_(2)OgtBeO` |
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Answer» Correct Answer - B On passing from left to right in a period acidic character of the normal oxides of the element goes on increasing with increase in electronegatively. |
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| 384. |
The order in which the following oxides are arranged according to decreasing basic nature isA. `Na_(2)O,MgO,Al_(2)O_(3),CuO`B. `MgO,Al_(2)O_(3),CuO,Na_(2)O`C. `Al_(2)O_(3),MgO,CuO,Na_(2)O`D. `CuO,Na_(2)O,MgO,Al_(2)O_(3)` |
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Answer» Correct Answer - A `Na_(2)O,MgO,Al_(2)O_(3),CuO`. The more the metallic character the higher the `e^(-)` donating tendency. Therefore lower the `IE` more the basic nature of oxide. |
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| 385. |
Which of the following statements is not correct?A. The ionic radii can be estimated by measuring the distances between cations and anions crystals.B. A positive ion is always smaller than the corresponding atom.C. Isoelectronic ions have identical sizes.D. A negative ion is always begger than corresponding atom. |
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Answer» Correct Answer - C Isoelectronic ions have different size on account of different magnitude of the nuclear charge or to be more appropriate, the nuclear charge per electron. The internuclear distance between cations and anions is taken as the sum of the radii of cations and anions. during the formation of anions, nuclear charge remains the same but repulsion from additional `e^(-)s` enlarges the `e^(-)` cloud while removal of `e^(-)` reduces `e^(-)-e^(-)` repulsion, so the `e^(-)` cloud shirnks during the formation of cations. |
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| 386. |
Which of the following has the smallest ionic radius?A. `Cr^(6+)`B. `Cr^(5+)`C. `Cr^(4+)`D. `Cr^(3+)` |
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Answer» Correct Answer - A The ionic radius decreases as more electrons are ionized off. |
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| 387. |
Which of the following has no unit?A. ElectronegativityB. Electron affinityC. Ionisation energyD. Excitation potential |
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Answer» Correct Answer - A Electronegatively is the property of a bonded atom. The relative tendency on an atom to attract the shared pair of electron toward itself is called electronagetively. |
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| 388. |
Which one consists of essential amino acids ?A. Tryptophan and Glutamic acidB. Lysine and PhenylalanineC. Leucine and GlycineD. Valine and Histidine |
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Answer» Correct Answer - A Tryptophan and glutamic acid consists of essential amino acids. |
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| 389. |
A virus infecting a bacterium is calledA. PlasmidB. BacteriophageC. Bacterial DNAD. Bacterial RNA |
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Answer» Correct Answer - B A virus infecting a bacterium is called bacteriphage. |
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| 390. |
Which group of organisms is represented by the given figure? A. Diatoms and desmids (golden algae)B. DinoflagellatesC. BacteriaD. Euglenoids |
| Answer» Correct Answer - B | |
| 391. |
Rod-shaped bacterium is calledA. BacillusB. CoccusC. VibriumD. Spirillum |
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Answer» Correct Answer - A Rod-shaped bacteria are called Bacillus. |
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| 392. |
A slide under microscope shows following features: (i) Unicellularity (ii) Well defined nucleus (iii) Biflagellate-one flagellum lying iongitudinally and the other trannsversely what would ou identify if as?A. ProtozoanB. BacteriumC. EuglenoidsD. Dinoflagellate |
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Answer» Correct Answer - D Dinoflagellates are basically unicelluslar, motile and biflagellate, golden brown (heterokont), one transverse flagellum and other longitudinal flagellum. The longitudinal flagellum is narrow, smooth, directed posteriorly and lies in the sulcus. The transvers flagellum is ribbon-like lies in the cingulum or annlus. The two tyhpes of flagella beat in different directions. A well defined nucleaus is present, which has been neamed as mesokaryon. |
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| 393. |
Dinoflagellates are mostlyA. marine and saprophyticB. freshwater and photosyntheticC. marine and photosyntheticD. marine and photosynthetic |
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Answer» Correct Answer - C Dinoflagellates are a group of about `1,000` species of photosynthetic protists. The dinoflagellates are important components of phytoplankton. Most of them are maine but some occur in freshwater. |
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| 394. |
Bacteria reproduce mainly byA. FissionB. BuddingC. ConjugationD. Sexual reproduction |
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Answer» Correct Answer - A Bacteria reproduce mainly by Fission. |
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| 395. |
The proteins that reproduce within the living cells are termed asA. PlasmidsB. PhagesC. PrionsD. Prophages |
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Answer» Correct Answer - C The proteins that reproduce within the living cells are termed as Prions. |
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| 396. |
Find out the correct statement.A. In lichens, the algal compnent is called phycobiont and fungal component is known as mycobiont, which are heterotrophic and autotrophic respectively.B. Viroid contains RNA of low molecular weight and protein coatC. A virus contains both RNA and DNAD. Viruses are obligatory parasites |
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Answer» Correct Answer - D `**` In lichens, the algal component is called phycobiont and fungal component is known as mycobiont, which are autotrophic and heterotrophic respectively. `**` Viroid contains RNA of low molecular weight and no protein coat. `**` A virus contains either RNA or DNA. `**` Viruses are obligatory parasites. |
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| 397. |
Cyanobacteria are used in agricultural fields for crop improvement because they causeA. `N_(2)` fixationB. algal bloomsC. photosynthesisD. all of these |
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Answer» Correct Answer - A Serveral cyanobacteria have the ability of nitrogen fixation. The filamentous form possess special large pale cells or heterocysts for this. |
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| 398. |
The mode of nutrition in protistan isA. Autotrophic/ photosyntheticB. Heterotrophic / ParasiticC. Saprophytic/ SaprotrophicD. Any of the above |
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Answer» Correct Answer - D The mode of nutrition in protistan is Autotrophic/Photosynthetic, Heterotrophic/ Parasitic and Saprophytic/Saprotrophic. |
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| 399. |
The five kingdom classification was proposed byA. RH WhittakerB. C LinnaeusC. A RoxbergD. Virchow |
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Answer» Correct Answer - A RH Whittaker (1969), an American taxonomist in order to develop phylogenetic classification divided organism into five kingdoms, i.e., (i) Monera (ii) Protista (iii) Fungi (iv) Plantae (v) Animalia Whereas, C Linnaeus developed two kingdom classification, i.e., (i) kingdom-phase (ii) kingdom-Animalia and Virchow is associated with the discovery of cell theory. |
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| 400. |
A geneticist wants to transfer DNA fragments and proteins respectively onto nitrocellulose membrane. Which two out of the following would actually lead to successful transfer ?A. Southern blotting and northern blottingB. Southern blotting and western blottingC. Western blotting and southern blottingD. Western blotting and northern blotting |
| Answer» Correct Answer - B | |