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. |
Bacteria without flagella are knonw asA. monotrichousB. peritrichousC. lophotrichousD. atrichous |
| Answer» Correct Answer - D | |
| 202. |
Bacteria having a tuft of flagella at both ends are calledA. trichousB. peritrichousC. cephalotrichousD. lophotrichous |
| Answer» Correct Answer - C | |
| 203. |
Recterium with only one flagellum at its one pole is calledA. lophotrichousB. monotrichousC. atrichousD. amphitrichous |
| Answer» Correct Answer - B | |
| 204. |
An example of chemoautotrophic bacterium isA. LactobacillusB. NitrosomonasC. Escherichia coliD. Rhizobium |
| Answer» Correct Answer - B | |
| 205. |
Vinegar is prepared from fermented sugar solution by the activities ofA. Acetobacter acetiB. Bacillus acetiC. B. subtilisD. Diplococcus |
| Answer» Correct Answer - A | |
| 206. |
Unicellular cyanobacteria reproduce asecually byA. ConjugationB. FragmentationC. Binary fissionD. Hormogones |
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Answer» Correct Answer - c Unicellular forms reproduce asexually by binary fission while filamentous forms are by Hormogones. |
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| 207. |
Heterocysts are found in certainA. VirusesB. BacteriaC. CyanobacteriaD. Mycoplasmas |
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Answer» Correct Answer - c Some cyanobacteria possess heterocyst like Nostoc, Scytonema etc. Heterocyst is a site of `N_(2)` fixation. |
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| 208. |
Viral genome incorporated and integrates with bacterial genomes is refer to asA. ProphagesB. RNAC. DNAD. Both (b) and (c) |
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Answer» Correct Answer - a The phage `lambda` DNA attaches to the specific site of bacterial genome with the help of `lambda` integrase anzyme. The phage DNA in this latent (non virulent) from is called provirus or prophage (integrated viral DNA with the host bacterial DNA). |
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| 209. |
The outemost limiting layer of mycroplasma is made up ofA. Cell wallB. Cell membraneC. Mucilaginous sheathD. Slime layer |
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Answer» Correct Answer - b Mycoplasma lacks cell wall, therefore the outermst existing layer is cell membrane. |
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| 210. |
Tendency of abortion in ladies is caused byA. CyanobacteriaB. BacteriaC. MycoplasmaD. None of these |
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Answer» Correct Answer - c Mycoplasma solivarium inhibit the food as well as blood to the developing embryo in pregnant female, which cause abortion. |
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| 211. |
Select the incorrect pair(s). I. Endospore-Actinomycetes II. Cyst formation-Azotobacter III. Conidia-Clostridium tetani Choose the correct option.A. I and IIB. II and IIIC. I and IIID. All of these |
| Answer» Correct Answer - C | |
| 212. |
Select the correct pair(s). I. Methanogens-Methanogenium, Methanothrix II. Halophiles-Halococcus, Haloarchaea III. Thermoacidophiles - Sulfolobus, Desulphurococcus Choose the correct option.A. I and IIB. II and IIIC. I and IIID. All of these |
| Answer» Correct Answer - D | |
| 213. |
A peculiar odour found in marshy areas and cow sheds is of gas produced byA. mycoplasmaB. archaebacteriaC. slime mouldsD. cyanobacteria |
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Answer» Correct Answer - B Archaebacteria is primitive group of bacteria. The three main groups of archaebacteria are methanogens, halophiles and thermocidophiles. Methanogens are obligate, anaerobic archaebacteria, which oxidise `CO_(2)` during cellular respiration to produce methane as a waste product. They found in the musk of swamps and marshes, the rumen of cattle, sewage sludges and gut of termites, e.g. Methanococcus jannaschii and Methanobacterium. |
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| 214. |
Which structures perform the function of mitochondria in bacteriaA. Cell wallB. MesosomesC. NucleoidD. Ribosomes |
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Answer» Correct Answer - b Mesosomes help in respiration, secretion processes, to increase the surface area of the plasma membrane and enzymatic contact. |
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| 215. |
Many bacteria bear minute hairy structures on their cell wall, these are calledA. hairB. flagellaC. piliD. cilia |
| Answer» Correct Answer - C | |
| 216. |
Clostridium butylicum has been used in the synthesis ofA. Vitamin -BB. Vitamin-AC. Vitamin -CD. Vitamin -D |
| Answer» Correct Answer - A | |
| 217. |
It is important to boil surgical instruments before using them in an operation . It is doneA. kill all pathogens infecting the instrumentsB. facilitate the handling of instrumentsC. enable the patient to feel warmth and comfortD. kill all pathogens at the place of operation |
| Answer» Correct Answer - A | |
| 218. |
How many organism in the list given below are autotrophs Lactobacillus, Nostoc, Chara, Nitrosomonas, Nitrobacter, Streptomuces, Sacharomyces, Trypanosoma, Porphyra WolfiaA. FourB. FiveC. SixD. Three |
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Answer» Correct Answer - c Nostoc, Chara, Porphyra and Wolfia are photoautotrophs while Nitrisomonas and Nitrobacter are chemoautotrophs. |
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| 219. |
The stain used to distinguish Gram positive bacteria from Gram negative ones isA. eosinB. crystal violetC. carmineD. hematoxylin |
| Answer» Correct Answer - B | |
| 220. |
The main difference between Gram positive and Gram negative bacteria lies in the composition ofA. CiliaB. Cell wallC. NucleolusD. Cytoplasm |
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Answer» Correct Answer - b In `G^(+)` (Gram-positive bacteria) cell wall is `200-300 Å` thick having mucopeptides `85%` and liquids `1-2%` while in `G^(-)` (Gram-negative bacterial) cell wall is `100-200 Å` thick and mucopeptides are `10-12%` and liquids `80-90%`. |
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| 221. |
A unique amino acid in the cell wall of Bacteria and BGA isA. CadipicoliniateB. Diaminopimelic acidC. GlutamateD. None of these |
| Answer» Correct Answer - B | |
| 222. |
The wall of bacteria consists ofA. N-acetyl glucosamineB. N-acetyl muramic acidC. Both (a) and (b)D. cellulose |
| Answer» Correct Answer - C | |
| 223. |
Gram negative bacteria differ from Gram positive bacteria in havingA. simpler wallB. complex wallC. thicker wallD. wall without lipids |
| Answer» Correct Answer - C | |
| 224. |
Streptococcus lactis is responsible forA. conversion of molasses into alcoholB. conversion of milk into curdC. tanning of leatherD. flavouring the leaves of tea and tobacco |
| Answer» Correct Answer - B | |
| 225. |
Terramycin is obtained from:A. Streptomyces rimosusB. S. griseusC. S. venezuelaeD. Bacillus subtilis |
| Answer» Correct Answer - A | |
| 226. |
Little leaf of brinjal is caused byA. VirusB. MycoplasmaC. FungusD. Algae |
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Answer» Correct Answer - b Little leaf of brinjal : In this disease, the leaves of Brinjal remain small in size because mycoplasma inhibits leaf expansion of leaf cells. |
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| 227. |
In which of the following there is no sexual reproductionA. UrothrixB. NostocC. AspergillusD. Volvox |
| Answer» Correct Answer - B | |
| 228. |
During rainy seasons, the ground becomes slippery due to dense growth ofA. LichensB. BacteriaC. Green algaeD. Cyanobacteria |
| Answer» Correct Answer - d | |
| 229. |
In which of the following there is no sexual reproductionA. UlothrixB. NostocC. AspergilusD. Volvox |
| Answer» Correct Answer - b | |
| 230. |
Single filament of Nastoc without mucilage sheath is known asA. HyphaeB. ColonyC. TrichomeD. Mycelium |
| Answer» Correct Answer - c | |
| 231. |
Nitrogenase enzyme is found in Nostoc in the cell ofA. VegetativeB. HeterocystC. Both (a) and (b)D. None of these |
| Answer» Correct Answer - b | |
| 232. |
Which of the following statements is not true for NostocA. It is prokaryoticB. It is autotrophicC. It is filamentousD. It is macroscopic |
| Answer» Correct Answer - d | |
| 233. |
Nostoc is known to performA. Only photosynthesisB. Photosynthesis and nitrogen fixation simultaneouslyC. Only nitrogen fixationD. Either photosynthesis or nitrogenfixation at a time |
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Answer» Correct Answer - b Because they have photosynthetic lamellae for photosynthesis and heterocyst for `N_(2)`-fixation. |
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| 234. |
The guts of cow and buffalo possessA. Chlorella spp.B. MethanogensC. CyanobacteriaD. Fucus spp. |
| Answer» Correct Answer - b | |
| 235. |
The bacteria present in the guts of several ruminant animals such as cows and buffaloes and is responsible for the production of methane areA. halophilesB. methanogensC. thermophilesD. acidophiles |
| Answer» Correct Answer - B | |
| 236. |
Which one of the following statements about mycoplasma is wrongA. They are also called PPLOB. They are pleomorphicC. They are sensitive to penicillinD. They cause diseases in plants |
| Answer» Correct Answer - C | |
| 237. |
Cyanobacteria of great nutritive value isA. GleocapsaB. ScytonemaC. StigonemaD. Spirulina |
| Answer» Correct Answer - D | |
| 238. |
The bacterium naturally not present in human alimentary canal isA. AzotobacterB. ClostridiumC. Bacillus subtilisD. All of these |
| Answer» Correct Answer - D | |
| 239. |
Which of the following is disease causing bacterium in human beings?A. Salmonella typhiB. Xanthomonas citriC. TMVD. Pilobolus |
| Answer» Correct Answer - A | |
| 240. |
In the following table identify the correct matching of the crop its decrease and the corresponding pathogenA. `{:("Crop","Disease","Pathogen"),("Citrus","Canker","Pseudomonas rubrilineans"):}`B. `{:("Crop","Disease","Pathogen"),("Potato","Late blight","Fusarium udum"):}`C. `{:("Crop","Disease","Pathogen"),("Brinjal","Root-knot","Meloidogyne incognita"):}`D. `{:("Crop","Disease","Pathogen"),("Pigeon pea","Seed gall","Phytophthora infestans"):}` |
| Answer» Correct Answer - c | |
| 241. |
Mycolic acid is present in cell wall of pathogen causingA. TetanusB. CholeraC. DiphtheriaD. Tuberculosis |
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Answer» Correct Answer - d Mycobacterium tuberculosis releases the mycolic acid, it is charged to mycoides involved in causing disease. |
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| 242. |
Which one of the following pathogens causes canker disease?A. Melodogyne incognitaB. Anguina triticiC. Xanthomonas citriD. Pseudomonas rubilineans |
| Answer» Correct Answer - C | |
| 243. |
Which of the following may cause water bloomsA. BacteriaB. MycoplasmaC. VirusD. Blue-green algae |
| Answer» Correct Answer - D | |
| 244. |
Which one of the following pathogen cause canker diseaseA. Meloidogyne incognitaB. Anguina triticiC. Xanthomonas citriD. Pseudomonas rubilineans |
| Answer» Correct Answer - c | |
| 245. |
Which is the cause of Anthrax diseaseA. VirusB. BacteriaC. MycoplasmaD. Algae |
| Answer» Correct Answer - B | |
| 246. |
Prokaryotes which can live in very harsh habitat like exterme salty areas areA. methanogensB. thermoacidophilesC. halophilesD. cyanochloronata |
| Answer» Correct Answer - C | |
| 247. |
Of the following statements which are not relevant to archaebacteria ;-a)They live in some of the most harsh habitats.b)They are present in the gut of several ruminant animals. c)They are characterized by the presence of a rigid cell wall .d)They include mycoplasma. e)They are also referred to as blue- green algae.A. I, II and IIIB. I, III and VC. III, IV and VD. I, III and IV |
| Answer» Correct Answer - C | |
| 248. |
Pigment phycocyanin and phycoerythrin are found inA. BacillariophyceaeB. ArchaebacteriaC. eubacteriaD. Cyanobacteria |
| Answer» Correct Answer - D | |
| 249. |
A bacterium is capable of withstanding extreme heat dryness and toxic chemicals. This indicates that it is probably able to formA. A thick peptidoglycan wallB. EndosporesC. EndotoxinsD. Endogenous buds |
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Answer» Correct Answer - b During unfavourable condition highly resistant signle spore is fomed in the bacterial cell (e.g., Tetanus and anthrax barcteria) which is known as endospore. |
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| 250. |
Which of the following are found in extreme saline conditionsA. Archae bacteriaB. EubacteriaC. CyanobacteriaD. Mycobacteria |
| Answer» Correct Answer - a | |