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.
| 101. |
Pasteurization is heating atA. `120^(@)C` for `60` minutesB. `60-70^(@)C` for `30` minutesC. `70^(@)C` for `60` minutesD. `80^(@)C` for `30` minutes |
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Answer» Correct Answer - b In the classic pasteurization treatement of milk, the milk was exposed to a temperature of about `63^(@)C` for `30` minutes. Most milk pasteurization today uses higher temperatures, at least `72^(@)C`, but for only `15` seconds. |
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| 102. |
Exotoxin is produced byA. Gram positive bacteriaB. Gram negative bacteriaC. Both (a) and (b)D. None of the above |
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Answer» Correct Answer - a Exotoxin is produced by mostly gram positive bacteria, these are protenaceous and heat labile compound which are excreted by bacteria out side the cell. |
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| 103. |
Cholera is caused byA. Bacillus mycobacteriumB. Vibrio choleraeC. Pseudomonas citriD. Streptococcus cholerae |
| Answer» Correct Answer - B | |
| 104. |
Which of the following is a bacterial disease?A. MeaslesB. SmallpoxC. RabiesD. Tuberculosis |
| Answer» Correct Answer - D | |
| 105. |
Which of the following statement is rightA. Fronds are found in bryophytesB. Multiciliate sperms are found in angiospermsC. Diatoms produce basidiosporesD. Heterocysts are found in Nostoc |
| Answer» Correct Answer - d | |
| 106. |
Cyanobacteria areA. Mosses which attack bacteriaB. Bacteria which attack cyanophyceaeC. Autotrophic organism with phycocyaninD. None of these |
| Answer» Correct Answer - c | |
| 107. |
Food poisoning is caused by the infection ofA. Bacillus megateriumB. Salmonella typhiC. E. coliD. Clostridium botulinum |
| Answer» Correct Answer - C | |
| 108. |
Bacteria areA. sole members of kingdom -MoneraB. with glycocalyx capsule layerC. with either DNA or RNA as genetic materialD. are cukaryotic in cell nature |
| Answer» Correct Answer - A | |
| 109. |
The characterisitic of blue green algea is Or Blue- green algae are called cynobacteria becauseA. DNA without histoneB. Nuclear membrane absentC. 70 S ribosomesD. All of the above |
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Answer» Correct Answer - d Blue green algae or cyanobacteria is designated as Prokaryotes. |
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| 110. |
`K_(12)` plasmid was studied first inA. E. coilB. ShigellaC. SalmonellaD. Eberthella |
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Answer» Correct Answer - a `K_(12)` plasmid was first studied in E. coil, by two American scientist Lederberg and Tatum (1946). |
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| 111. |
The correct statements are I. Plasmid is a small circular piece of DNA, located in the cytoplasm of many bacteria. II. Distilled water is usually free from bacteria. III. Red colour of red sea is due to the presence of a cyanobacterium Trichodesmium IV. Bacteria are eukaryotes.A. I, II and IIIB. II and IIIC. I and IID. I and III |
| Answer» Correct Answer - A | |
| 112. |
Plasmid are used as carried becauseA. It has antibiotic resistance genesB. Its both ends are replication pointsC. It can go between eukaryotic and prokaryotic cellsD. It is circular DNA which has capacity to bind eukaryote DNA |
| Answer» Correct Answer - a | |
| 113. |
The process of replication in plasmid DNA, other than initiation, is controlled byA. Plasmid geneB. Bacterial geneC. Cytoplasmic geneD. Mitochondrial gene |
| Answer» Correct Answer - b | |
| 114. |
Black rot of crucifers is caused by aA. FungusB. BacteriumC. VirusD. None of these |
| Answer» Correct Answer - b | |
| 115. |
The Bacillus haemophilus causesA. influenzaB. pneumoniaC. a form meningitisD. whooping cough |
| Answer» Correct Answer - A | |
| 116. |
Mesosome in a bacterial cell isA. PlasmidB. Connection between two cellsC. Plasma membrane infolded for respirationD. None of these |
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Answer» Correct Answer - c In many bacteria (specially gram +ve) the plasma membrane gives rise to infoldings called measosome. They have respiratory enzymes like succinic dehydrogenase, cytochrome oxidase for respiration. |
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| 117. |
Which of the following compounds are decomposed during putrefactionA. ProteinsB. FatsC. CarbogydratesD. None |
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Answer» Correct Answer - a Anaerobic breakdown of proteins is known as putrefaction. |
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| 118. |
Sexual reproduction is absent inA. CyanobacteriaB. BacteriaC. EukaryoteD. All of the above |
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Answer» Correct Answer - a Cyanobacteria is haploid so meiosis and fertilization is absent. |
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| 119. |
Which of the following plants is used as biofertiliserA. NostocB. FunariaC. VolvoxD. Rhizopus |
| Answer» Correct Answer - A | |
| 120. |
Which of the following has polar nodule on both the endsA. AkinetesB. HormogoniaC. HeterocystsD. None of these |
| Answer» Correct Answer - C | |
| 121. |
Match the following Columns. A. `{:(A,B,C,D),(2,4,3,1):}`B. `{:(A,B,C,D),(3,4,2,1):}`C. `{:(A,B,C,D),(4,2,1,3):}`D. `{:(A,B,C,D),(1,2,3,4):}` |
| Answer» Correct Answer - B | |
| 122. |
Match the following Columns. A. `{:(A,B,C,D),(1,2,3,4):}`B. `{:(A,B,C,D),(3,4,2,1):}`C. `{:(A,B,C,D),(1,3,2,4):}`D. `{:(A,B,C,D),(1,3,4,2):}` |
| Answer» Correct Answer - D | |
| 123. |
According to the mode of respiration, bacteria can be aerobic or anaerobic. Each of them is further of two types, obligate and facultative. Regarding above information match the following Columns. A. `{:(A,B,C,D),("4-(i),","3-(iii),","1-(iv),","3-(ii)"):}`B. `{:(A,B,C,D),("4-(i),","3-(ii),","2-(iii),","1-(iv)"):}`C. `{:(A,B,C,D),("1-(ii),","2-(i),","3-(iv),","4-(iii)"):}`D. `{:(A,B,C,D),("4-(iii),","3-(iv),","2-(i),","1-(ii)"):}` |
| Answer» Correct Answer - B | |
| 124. |
[A] : No any autotrophic bacteria carry out chemosynthesis . [R] : Chemosynthetic bacteria take energy from sun for the synthesis of food .A. If both A and R are true and R is the correct explanation of AB. If both A and R are true but R is not the correct explanation of AC. If A is true and R is falseD. If both A and R are false |
| Answer» There are many autotrophic bacteria which can carry out chemosynthesis. | |
| 125. |
The common mode of reproduction in bacteria isA. fissionB. buddingC. sexual reproductionD. sporulation |
| Answer» Correct Answer - A | |
| 126. |
The main difference between photosynthetic and chemosynthetic bacteria isA. photosynthetic bacteria are seen in green plants, while chemosynthetic bacteria are seen in chemical substancesB. photosynthetic bacteria are parasites within green plant cells, while chemosynthetic bacteria are saprophytes on decaying food substancesC. `H_(2)O` is used by photosynthetic bacteria, but not by chemosynthetic bacteriaD. energy of sunlight is used in photosynthetic bacteria, whereas in chemosynthetic bacteria energy is derived by the oxidation of inorganic substances |
| Answer» Correct Answer - D | |
| 127. |
the main role of bacteria in the carbon cycle involvesA. PhotosynthesisB. Assimilation of itrogenous compoundC. ChemosynthesisD. Digestion or breakdown of organic compounds |
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Answer» Correct Answer - d The main role of bacteria is as a decomposer. The bacteria decompose the complex organic compounds into simple one which are reused in carbon cycle. |
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| 128. |
A large number of organic compounds can be decomposed byA. ChemoorganoB. PseudomonasC. AcetobacterD. Mycoplasma |
| Answer» Correct Answer - a | |
| 129. |
Hormogonia are the vegetatively reproducing structures ofA. UlothrixB. SpirogyraC. OscillatoriaD. Chlamydomonas |
| Answer» Correct Answer - c | |
| 130. |
Which one of the following bacteria has potential for nitrogen fixationA. NitrosomonasB. NitrobacterC. NitrosococcusD. Rhizobium |
| Answer» Correct Answer - d | |
| 131. |
Cyanobacterial cells which are specialised for nitrogen fixation areA. phycobilisomesB. heterocystsC. hormogoniaD. trichomes |
| Answer» Correct Answer - B | |
| 132. |
Free living bacteria that can fix `N_(2)` from soil isA. ClostridiumB. AzotobacterC. BeijerinckiaD. All of these |
| Answer» Correct Answer - d | |
| 133. |
During biological nitrogen fixation, inactivation of nitrogenase by oxygen poisoning is prevented byA. XanthophyllB. CaroteneC. CytochromeD. Leghaemoglobin |
| Answer» Correct Answer - d | |
| 134. |
Assertion : Cell secretion does not occur in bacteria. Reason : Golgi complex is absent in bacteria.A. If both the assertion and the reason are true and the reason is a correct explanation of the assertionB. If both the assertion and the reason are true and the reason is not a correct explanation of the assertionC. If the assertion is true but the reason is falseD. If the assertion is false but reason is true |
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Answer» Correct Answer - d Cell secretion occurs even in the prokaryotic cells (bacteria) in relation to the production of a variety of anzyme to the medium. In certain protozoa, vacuoles similar to the contraction expel water into the medium. Golgi complex are found, which by their contraction expel water into the medium. Golgi complex and other membrane found organelle are absent in prokaryotes. |
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| 135. |
Penicillin and Vancomycin do not affect the mycoplasma becauseA. there is no cell wallB. there is no nucleusC. there is no mitochondriaD. there in no Golgi body |
| Answer» Correct Answer - A | |
| 136. |
Penicillin and Vancomycin do not affect the mycoplasma becauseA. There is no cell wallB. There is no nucleusC. there is no mitochondriaD. There is no golgi body |
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Answer» Correct Answer - a Penicillin and vancomycin inhibits the cell wall synthesis. |
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| 137. |
Gram staining is aA. stain produced out of a GramB. trade markC. staining technique developed by Dutch scientist GramD. chemical for the differentiation of bacteria |
| Answer» Correct Answer - C | |
| 138. |
Prokaryotes found inhabiting the Great Salt Lake would be theA. cyanobacteriaB. exterme halophilesC. extermophilesD. methanogens |
| Answer» Correct Answer - B | |
| 139. |
The archaebacteria living in hot sulphur spring and able to reduce sulphur to `H_(2)` areA. methanogensB. halophilesC. thermoacidophilesD. Both (a) and (b) |
| Answer» Correct Answer - C | |
| 140. |
For retting of jute the fermenting microbe used isA. Methophilic bacteriaB. Butyric acidC. Helicobactor pyloriD. Streptococcus lactin |
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Answer» Correct Answer - b In this process bacteria decompose the pectin of the plant to linerate fibers. The process of fibre preparation is known as retting. This process is carried out by clostridium butyrium. |
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| 141. |
The similarity between cyanobacterium and bacterium isA. presence of nucleoidB. presence of flagellaC. presence of 80S ribosomesD. None of the above |
| Answer» Correct Answer - A | |
| 142. |
Which is not a cyanobacteriumA. LyngbyaB. PlectonemaC. AnabaeneD. Sinorhizobium |
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Answer» Correct Answer - d Sinorhizobium is a bacterium |
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| 143. |
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. `175xx10^(5)` cellsB. `85xx10^(5)` cellsC. `35xx10^(5)` cellsD. `32xx10^(5)` cells |
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Answer» Correct Answer - d As we know that bacterium divides after every `35` minutes through simple mitotic division therefore number of divisions are `175/35=5` Since one bacterium on division produces two cells so cell cencentration after `175` minutes will be `=10^(5)xx(2)^(5)" "=32xx10^(5)`. |
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| 144. |
The motile bacteria are also to move byA. CiliaB. PiliC. FimbriaeD. Flagella |
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Answer» Correct Answer - d Motile bacteria have thin filamentous extensions from their cell wall called flagella. |
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| 145. |
The function of leghaemoglobin in the root nodules of legumes isA. Expression of `nif` geneB. Inhibition of nitrogenase activityC. Oxygen removalD. Nodule differentiation |
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Answer» Correct Answer - c LHB is `O_(2)` scavanger. |
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| 146. |
Botulism is aA. type of food poisoning due to saprophytic bacteriumB. disease in man due to parasitic bacteriumC. disease in various organismsD. disease of plants due to viruses |
| Answer» Correct Answer - A | |
| 147. |
The germ theory of disease was putforth byA. KochB. PasteurC. Both (a) and (b)D. Devaine |
| Answer» Correct Answer - C | |
| 148. |
Which of the following is a flowering plant with nidules containing filamentous nitrogen-fixing microorganismA. Casuarina equisetifoliaB. Crotalaria junceaC. Cycas revolutaD. Cicer arietinum |
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Answer» Correct Answer - a Frankia is a filamentous `N_(2)`-fixing bacteria which is symbiont on the root of Casuarina equisetifolia. |
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| 149. |
The germ theory of diease was putforth byA. KochB. PasteurC. RayerD. Devaine |
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Answer» Correct Answer - b On the basis of his work Pasteur proposed 'germ theory of disease' which was recognised by medical scientists very soon. |
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| 150. |
Amitosis is shown byA. BacteriaB. EugleneC. SyllisD. Hydra |
| Answer» Correct Answer - a | |