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.
| 201. |
Which one of the following represents the electronic configuration of the most electropositive element?A. `[He]2s^(1)`B. `[Xe]6s^(1)`C. `[He]2s^(2)`D. `[Xe]6s^(2)` |
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Answer» Correct Answer - B Electropositive nature increases down the group and decreases across the period. |
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| 202. |
What is true for photolithotrophs?A. Obtain energy from radiations and hydrogen from organic compoundsB. Obtain energy from radiations and hydrogen from inorganic compoundsC. Obtain energy from organic compoundsD. Obtain energy from inorganic compounds |
| Answer» Correct Answer - B | |
| 203. |
All are neurotropic (involving central nervous system) viral diseases exceptA. RabiesB. poliomyelitisC. EncephalitisD. Herpes simplex |
| Answer» Correct Answer - D | |
| 204. |
Common cold, the most contagious disease is due toA. rhino and adeno virusesB. rubella virusC. varicella virusD. SV 40 virus |
| Answer» Correct Answer - A | |
| 205. |
In five kingdom classification, bacteria belong toA. MoneraB. ProtistC. PlantaeD. Archaea |
| Answer» Correct Answer - A | |
| 206. |
Super kingdom isA. obligate categoryB. taxonC. intermediate categoryD. category |
| Answer» Correct Answer - C | |
| 207. |
Assertion: The first ionisation energy of `Be` is greater than that of `B`. Reason: 2p-orbital is lower in energy than 2s-orbital. |
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Answer» Correct Answer - C 2s orbital has lower energy than 2p. |
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| 208. |
The protein cost called capsied made of small subunits called capsomeres are present inA. VirusesB. BacteriaC. FungiD. Gymnosperms |
| Answer» Correct Answer - A | |
| 209. |
Which of the following statement is incorrect about viruses ?A. Viruses contain either RNA or DNAB. Viruses do not have their own metabolicC. Bacteriophages are usually double stranded DNA virusesD. TMV contains both RNA and DNA as their genetic material |
| Answer» Correct Answer - D | |
| 210. |
Who demonstrated that the extract of the infected plants of tobacco could cause infection in healthy plants ?A. PasteurB. M.W. BeijerinekC. D.J. IvanowskyD. W.M. Stanley |
| Answer» Correct Answer - B | |
| 211. |
Viruses that infect the bacteria are termed asA. CyanophagesB. BacteriophagesC. MycophagesD. Both (1) & (2) |
| Answer» Correct Answer - B | |
| 212. |
Viruses that infect bacteria, multiply and cause their lysis, are calledA. LysozymesB. LipolyticC. LyticD. Lysogenic |
| Answer» Correct Answer - C | |
| 213. |
A : Viruses which infect animals generally possess ssRNA or dsRNA or dsDNA. R : Phytophagineae generally contain dsDNA.A. If both assertion & reason are true and the reason is the correct explanation of the assertionB. If both assertion & reason are true but the reason is not the correct explanation of the assertionC. If assertion is true statement but reason is falseD. If both assertion and reason are false statements |
| Answer» Correct Answer - C | |
| 214. |
Viruses that infect the bacteria are called____________. |
| Answer» Correct Answer - Bacteriophage | |
| 215. |
The electron affinity values (in `kJ mol^(-1)` ) of three halogens, X, Y and Z are respectively -349, -333 and -325. Then X, Y and Z are respectivelyA. `F_(2), Cl_(2) and Br_(2)`B. `Cl_(2), F_(2) and Br_(2)`C. `Cl_(2), Br_(2) and F_(2)`D. `Br_(2), Cl_(2) and F_(2)` |
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Answer» Correct Answer - B Noble to smaller size of F, the Cl have EA higher than F. |
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| 216. |
A : Phycobiont is dominant parent in lichens. R : Algal component in the dual organisms can be eukaryotic only.A. If both assertion & reason are true and the reason is the correct explanation of the assertionB. If both assertion & reason are true but the reason is not the correct explanation of the assertionC. If assertion is true statement but reason is falseD. If both assertion and reason are false statements |
| Answer» Correct Answer - D | |
| 217. |
Algae have cell wall made up of :A. Cellulose, hemicellulose and pectinsB. Cellulose, galactans and mannansC. Hemicellulose, pectins and proteinsD. Pectins, cellulose and proteins |
| Answer» Correct Answer - B | |
| 218. |
Virus envelope is known asA. CoreB. CapsidC. VirionD. Nucleoprotein |
| Answer» Correct Answer - B | |
| 219. |
Infectious proteins are presents inA. Satellite virusesB. Gemini virusesC. PrionsD. Viroids |
| Answer» Correct Answer - C | |
| 220. |
Branched chain lipids occur in the cell membranes ofA. MethanobacteriumB. MycoplasmaC. ActinomycetesD. Streptomyces |
| Answer» Correct Answer - A | |
| 221. |
A location with luxuriant growth of lichens on the trees indicates that theA. Trees are very healthyB. Trees are heavily infestedC. Location is highly pollutedD. Location is not polluted |
| Answer» Correct Answer - D | |
| 222. |
Which one of the following oxides is neutral ?A)`CO`B)`SnO_(2)`C)`ZnO`D)`SiO_(2)`A. COB. `SnO_(2)`C. ZnOD. `SiO_(2)` |
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Answer» Correct Answer - A Examples of neutral oxides are `CO,H_(2)O,N_(2)O`. These oxides are neutral towards litmus paper. |
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| 223. |
There exists a close associatin between the algae and the fungus within a lichen. The fungusA. Provides protection, anchorage and absorption for the algaeB. Provides food for the algaC. Fixes the atmospheric nitrogen for the algaD. Releases oxygen for the alga |
| Answer» Correct Answer - A | |
| 224. |
A : Lichens do not grow in polluted area having `SO_(2)`. R : Lichens secrete carbonic acid and oxalic acid on barren rocks.A. If both assertion & reason are true and the reason is the correct explanation of the assertionB. If both assertion & reason are true but the reason is not the correct explanation of the assertionC. If assertion is true statement but reason is falseD. If both assertion and reason are false statements |
| Answer» Correct Answer - B | |
| 225. |
Sodium sulphate is soluble in water,whereas barium sulphate is sparingly soluble becauseA. the hydration energy of sodium sulphate is more than its lattice energyB. the lattice energy of barium sulphate is more than its hydration energyC. the lattice energy has no role to play in solubilityD. the hydration energy of sodium sulphate is less than its lattice energy |
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Answer» Correct Answer - A::B (a) Correct For greater solubility, hydration energy must be greater than lattice energy. (b) Correct Greater lattice energy dicourage dissolution of a salt. (c) Incorrect When a salt dissolve, energy is required to break the lattice, which comes from hydration process. (d) Incorrect Explained in (A). |
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| 226. |
Which among the following is the most reactive gtA. `Cl_(2)`B. `Br_(2)`C. `I_(2)`D. `lCl` |
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Answer» Correct Answer - D `Cl_(2), Br_(2)` and `I_(2)` are homonuclear diatomic molecule in which electronegativity of the combining atoms is same, so they are more stable and less reactive, whhereas, `I` and `Cl` have different electronegativities and bond between them are polarised and reactive. Therefore, interhalogen compounds are more reactive. Time Saving Technique: In this type of question of halogen, only go thorugh the polarity of the molecules. As we know, diatomic molecule does not have polarity but molecules with dissimilar sizes have polarity resulting in more reactivity. |
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| 227. |
A : Unicellular eukaryotes are included in Monera. R : Unicellular eukaryotes have 70S cytoribosomes.A. If both assertion & reason are true and the reason is the correct explanation of the assertionB. If both assertion & reason are true but the reason is not the correct explanation of the assertionC. If assertion is true statement but reason is falseD. If both assertion and reason are false statements |
| Answer» Correct Answer - D | |
| 228. |
Dengue (the break-bone fever) is spread byA. Cu/ex mosquitoB. Male Anopheles mosquitoC. AnophelesD. Female Aedes mosquito |
| Answer» Correct Answer - D | |
| 229. |
Tobacco mosaic virus is elongated rof like with sizeA. `300 xx 10` nmB. `300 xx 5` nmC. `300 xx18` nmD. `700 xx 30` nm |
| Answer» Correct Answer - C | |
| 230. |
Adhesive pad of fungi penetrate the host with the help of:-A. Mechanical pressure and enzymesB. Hooks and suckersC. Softening by enzymes onlyD. Only by mechanical pressure |
| Answer» Correct Answer - A | |
| 231. |
Which one of the following statements about viruses is correctA. Viruses possess their own metabolic systemB. All viruses contain both RNA and DNAC. Viruses are obligate parasitesD. Nucleic acid of viruses is known as capsid |
| Answer» Correct Answer - C | |
| 232. |
Which of the following statements is not true for retrovirusesA. DNA is not present at any stage in the life cycle of retrovirusesB. Retroviruses carry gene for RNA-dependent DNA polymeraseC. The genetic material in mature retroviruses is RNAD. Retroviruses are causative agents for certain kinds of cancer in man |
| Answer» Correct Answer - A | |
| 233. |
The causative agent of mad-cow diesase is aA. VirusB. BacteriumC. PrionD. Worm |
| Answer» Correct Answer - C | |
| 234. |
Which one of the following statement about lichens is wrong ?A. These grow very rapidly (2 cm per day)B. They show fungal and algal symbiotic relationshipsC. Some of its species are eaten is reindeersD. These are pollution indicators |
| Answer» Correct Answer - A | |
| 235. |
On the basis of host attacked viruses are classified intoA. twoB. threeC. fourD. five |
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Answer» Correct Answer - B Viruses are of three types-Zoophagineae (animal viruses), Phytophagineae (plant viruses) and Phagineae (phages). |
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| 236. |
Bacteriophage `T_(2)` containsA. ds DNAB. ss DNAC. ss RNAD. ds RNA |
| Answer» Correct Answer - A | |
| 237. |
The term bacteriophage was coined byA. de HerelleB. TwortC. StanleyD. lvanowski |
| Answer» Correct Answer - A | |
| 238. |
Bacteriophage isA. killer of virusB. killer of bacteriaC. killer of moneransD. eater of bacteria |
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Answer» Correct Answer - C As the name indicates, bacteriphages are eater of bacteria but no phage eat bacteria. They actually kill them. |
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| 239. |
Genes of TMV areA. ds DNAB. polydeoxyribonucleotidesC. ss RNAD. polyribonucleotides |
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Answer» Correct Answer - D Genes are segments of nucleic acid. In TMV, segments of RNA are polyriboncleotides. |
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| 240. |
The most mutable virus isA. HIVB. Chicken Pox virusC. Influenza virusD. Dengue virus |
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Answer» Correct Answer - A No vaccine could be developed against HIV because it has high mutagenic rate arose during reverse transcription. It has no polymerase for the repairing of its mutated DNA. |
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| 241. |
Viruses are haploid having only one genome. Which group of viruses is diploid and have two genomes ?A. retro vi rusesB. reovirusesC. ribovirusesD. zoophages. |
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Answer» Correct Answer - A Retrovirus like HIV are diploid as they have two RNA genomes (strands). |
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| 242. |
Who cultured the virus (Polio virus) for the first time in human cellsA. EndersB. StanleyC. TakahashiD. Pasteur |
| Answer» Correct Answer - A | |
| 243. |
Now-a-days Polio vaccine is deliveredA. orallyB. intravenouslyC. intradermallyD. intramuscularly |
| Answer» Correct Answer - A | |
| 244. |
Red tide is caused by rapid multiplication ofA. NostocB. DesmidsC. DiatomsD. Gonyaulax |
| Answer» Correct Answer - B | |
| 245. |
One of these is a plant virus ?A. TMVB. HIVC. RetrovirusD. SV 40 |
| Answer» Correct Answer - A | |
| 246. |
In the study of physics, we often have to measure the physical quantities. The numerical value of a measured physical quantity can only be approximate value as it depends upon the least count of the measuring instrument used. The number of significant figures in any measurement indicates the degree of precision of that measurement. The importance of significant figures lies in calculation. A mathematical calculation cannot increase the precision of a physical measurement. Therefore, the number of significant figures in the sum or product of a group of numbers cannot be greater than the number that has the least number of significant figures because a chain cannot be stronger than its weakest link. The difference in the true value and the measured value of a quantity is the measure of error in the measurement. (a) What are significant figures?( b) Define least count.(c) Is there any relation between precision and accuracy?(d)State the relation between significant figures and precision.(e) How systematic errors can be minimized? |
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Answer» (a) The term “significant figures” refers to the number of important single digits (0 to 9 inclusive) in the coefficient of expression in the scientific notation. (b) The least count of an instrument is the smallest measurement that can be taken accurately with it. (c) The difference between precision and accuracy is given below Precision (1) It could be defined as the level of correctness of a measurement to its true value. (2) It has one factor used for measuring. (3) Accurate items have to be precise in most cases. Accuracy (1) It could be defined as the sharp exactness of a measurement. (2) It has multiple factors for measurement. (3) Precise items may or may not be accurate. (d) The smaller the measurement increment, the more precise the tool. Significant figures express the precision of a measuring tool. When multiplying or dividing measured values, the final answer can contain only as many significant figures as the least precise value. (e) Systematic errors can be minimized by improving experimental techniques, selecting better instruments and removing personal bias as far as possible. For a given set up, these errors may be estimated to a certain extent and the necessary corrections may be applied to the readings. |
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| 247. |
An example of endomycorrhiza isA. NostocB. GlomusC. AgaricusD. Rhizobium |
| Answer» Correct Answer - B | |
| 248. |
VAM is an example ofA. EndomycorrhizaB. EctoparasitismC. EndoparasitismD. Ectomycorrhiza |
| Answer» Correct Answer - A | |
| 249. |
Artificial system is based onA. one or two morphological charactersB. few charactersC. several charactersD. synthetic characters |
| Answer» Correct Answer - A | |
| 250. |
The pair of amphoteric hydroxides isA. `Al(OH)_(3),LiOH`B. `Be(OH)_(2), Mg(OH)_(2)`C. `B(OH)_(3), Be(OH)_(2)`D. `Be(OH)_(2), Zn(OH)_(2)` |
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Answer» Correct Answer - D Both `Be(OH)_(2) and Zn(OH)_(2)` are amphoteric in nature. |
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