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.
| 151. |
Oxygenic photosynthesis occurs inA. ChromatiumB. OscillatoriaC. RhodospirillumD. Chlorobium |
| Answer» Correct Answer - b | |
| 152. |
There is no alternation of generation in Esherichia coil because there is noA. SyngamyB. Raduction divisionC. ConjugationD. None of these |
| Answer» Correct Answer - b | |
| 153. |
Shorter generation time of E. coil compared to eukaryotes may be explained on the basis ofA. ShapeB. Large surface : volume ratioC. Presence of cell wallD. Absence of organelles |
| Answer» Correct Answer - b | |
| 154. |
Which of the following statement is true for MycoplasmaA. The presence of cell wallB. The presence of nucleusC. The absence of cell wallD. Definite shape |
| Answer» Correct Answer - C | |
| 155. |
Escherichila coil has the following combination of charactersA. Rod shaped, `1-3 mu m` long, gram negativeB. Rod shaped, `1-3 mu m` long, gram positiveC. Spiral, `1-3 mu m` long, gram negativeD. Spiral, `1-3 mu m` long, gram positive |
| Answer» Correct Answer - a | |
| 156. |
One of the followings is not the characteristic feature of cyanobacteriaA. The are multicellularB. They form coloniesC. They form blooms in polluted water bodiesD. They can fix atmospheric nitrogen |
| Answer» Correct Answer - a | |
| 157. |
Mycoplasma is related toA. AlgaeB. BacteriophageC. VirusD. L-form bacteria |
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Answer» Correct Answer - d Both mycoplasma and L-form bacteria are cell wall less. |
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| 158. |
Organisms without any specific shape areA. MycoplasmaB. BacteriaC. VirusesD. Cyanobacteria |
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Answer» Correct Answer - a Due to the absence of cell wall, mycoplasma are highly elastic and readily change the shape, hence the mycoplasmas are irregular and quite variable in shape. This nature is called pleomorphism. |
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| 159. |
The name cyanobacteria refers toA. BacteriaB. Blue-green algaeC. YeastD. Fungi |
| Answer» Correct Answer - b | |
| 160. |
Which one of the following statements is wrongA. Cyanobacteria are also called blue-green algaeB. Golden algae are also called desmidsC. Eubacteria are also called false bacteriaD. Phycoycetes are also called algal fungi |
| Answer» Correct Answer - c | |
| 161. |
Pick up the wrong statementA. Protista have photosynthetic and heterotrophic modes of nitritionB. Some fungi are edibleC. Nuclear membrane is present in moneraD. Cell wall is absent in animalia |
| Answer» Correct Answer - c | |
| 162. |
Which one of the following is wrong statementA. Anabaena and Nostoc are capable of fixing nitrogen in free living state alsoB. Root nodule forming nitrogen fixers live as aerobes under free living conditionsC. Phosphorus is a constituent of all membranes, certain nucleic and all proteinsD. Nitrosomonas and Nitrobacter are chemoautotrophs |
| Answer» Correct Answer - c | |
| 163. |
Select the wrong statementA. Mycoplasma is a wall-less microorganismB. Bacterial cell wall is made up of peptidoglycanC. Pili and fimbriae are mainly involved in motility of bacteria cellsD. Cyanobavyeria lack flagellated cells |
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Answer» Correct Answer - c Motility is perfomed by flagella only in bacterial cells while fimbriae provide attachment to base and pili form conjugation tube during conjugation |
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| 164. |
Select the mismatchA. Methanogens- ProkaryotesB. Gas vacuoles-Green bacteriaC. Large central vacuoles-Animal cellsD. Protists- Eukaryotes |
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Answer» Correct Answer - c Large central vacuole is present in plant cells |
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| 165. |
PPLO reproduce (multiply) byA. Gametic fusionB. Binary fissionC. AkinetesD. Endospore |
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Answer» Correct Answer - b Mycoplasma is irregular in shape and divides by simple binary fission. |
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| 166. |
An organism having cytoplasm DNA and RNA but no cell wall isA. CyanobacteriumB. MycoplasmaC. BacteriumD. Virus |
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Answer» Correct Answer - b Mycoplasma are cell wall less cells but show multiplication like bacteria, so that they are termed as cell wall less bacteria. |
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| 167. |
Select the correct pair(s). I. Atrichous-Pasteurella. II. Cephalotrichous-Pseudomonas. III. Monotrichous-Vibrio. IV. Lophotrichous -Spirillum. Choose the correct option.A. I and IIIB. II and IVC. I, III and IVD. I, II, III and IV |
| Answer» Correct Answer - D | |
| 168. |
When DNA is exchanged via cytoplasmic bridges between two bacteria, the process is calledA. transformationB. general transductionC. restricted transductionD. conjugation |
| Answer» Correct Answer - D | |
| 169. |
Which of the following is not correct ?A. Heterotrophic bacteria are most abundant in natureB. Chemosynthetic bacteria oxidise various inorganic substances such as nitrates, nitrites and ammonia and use the released energy for their ATP productionC. Cyanobacteria have chlorophyll -a lilke green plantsD. Bacteria reproduce only by fission |
| Answer» Correct Answer - D | |
| 170. |
Sexual reproduction in bacteria occurs by I. transduction II. conjugation III. sporulation IV. fissionA. I, II and IIIB. I and IIC. II and IVD. I and III |
| Answer» Correct Answer - B | |
| 171. |
Which iof the following movement may be found in blue-green algaeA. FlagellarB. CiliaryC. GlidingD. None of the above |
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Answer» Correct Answer - c Cilia and flagella absent in blue green algae. |
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| 172. |
Spirochaetes is/areA. a class of insectB. a class of virusesC. bacteriaD. fungi |
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Answer» Correct Answer - C Spirochaetes are slender and helically coiled bacteria varying in length from `3-500mum`. Some of them are saprophytes and the other are parasites. The spirochaete, Treponema pollidum causes syphilis disease. |
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| 173. |
Which structure helps in movement of spirochaetes?A. PiliB. Axial filamentsC. FlagellaD. Fimbriae |
| Answer» Correct Answer - B | |
| 174. |
Which statement is correct?A. All bacteria are autotrophicB. All bacteria are heterotrophicC. All bacteria are photosyntheticD. Mostly bacteria are heterotrophic, but some are autotrophic |
| Answer» Correct Answer - D | |
| 175. |
Mycoplasma isA. Gram positiveB. Gram negativeC. Some species are Gram positiveD. None of these |
| Answer» Correct Answer - B | |
| 176. |
Some bacteria have a capsule outside cell wall , It is made ofA. proteinB. celluloseC. fatD. mucopolysaccharide |
| Answer» Correct Answer - D | |
| 177. |
Match the type of flagellar arrangement in Column I with their correct names in Column II and mark the right code. A. `{:(A,B,C,D,E),(4,2,5,3,1):}`B. `{:(A,B,C,D,E),(4,1,5,3,2):}`C. `{:(A,B,C,D,E),(4,3,5,1,2):}`D. `{:(A,B,C,D,E),(4,2,5,1,3):}` |
| Answer» Correct Answer - D | |
| 178. |
True nucleus is absent inA. AnabaenaB. MucorC. VaucheriaD. Volvox |
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Answer» Correct Answer - A Anabaena is prokaryotic blue-green algae having no true nucleus and membrane bound organelles. Rather a nucleoid region containing genetic material is present in the cytoplasm. The other cells like Mucor, Vaucheria and Volvox belong to fungi and algae. |
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| 179. |
Select the incorrect statement .A. Bacterial cell wall is made up of peptidoglycanB. Pili and fimbriae are mainly involved in motility of bacterial cellsC. Cyanobacteria lack flagellated cellsD. Mycoplasma is a wall-less microorganism |
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Answer» Correct Answer - B Fimbriae or pili are fine hair - like appendages used by bacteria for attachment rather than mobility. These are formed of protein called pilin. |
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| 180. |
What is incorrect for mycoplasmaA. They are osmotically incativeB. Show absence of cell wallC. Are sensitive to modern antibioticsD. Are obligate intracellular parasites |
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Answer» Correct Answer - d Mycoplasma can grow out side the host cell. Thus it is clear that mycoplasma are not obligate parasite like viruses. |
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| 181. |
Gram -ve and +ve bacteria have cell membrane made up ofA. Proteins and lipidsB. CelluloseC. FatsD. Chitin |
| Answer» Correct Answer - a | |
| 182. |
The motile bacteria are also to move byA. flagellaB. ciliaC. piliD. fimbriae |
| Answer» Correct Answer - A | |
| 183. |
An example of iron bacteria isA. BeggiatoaB. GeobacillusC. FerrobacillusD. None of these |
| Answer» Correct Answer - c | |
| 184. |
What is a genophoreA. DNA in prokaryotesB. DNA and RNA in prokaryotesC. DNA and protein in prokaryotesD. RNA in prokaryotes |
| Answer» Correct Answer - b | |
| 185. |
Genophore term was coined by Hans Ris forA. Genetic material of virusB. Stack on which spore originatedC. Bacterial chromosomeD. Fungal chromosome |
| Answer» Correct Answer - c | |
| 186. |
Unicellular,cell wall bound, spherical or rod-shaped microorganisms, usually smaller than 5 micron in size which lack an organised nucleus and auto or heterotrophic are calledA. virusesB. bacteriaC. algaeD. mycoplasma |
| Answer» Correct Answer - B | |
| 187. |
Which of the following is not blue-green algaeA. NostocB. AnabaenaC. LichenD. Aulosiras |
| Answer» Correct Answer - C | |
| 188. |
Bacterial ribosomes are presentA. In cytoplasmB. On endoplasmic reticulumC. On nuclear membraneD. On cell wall |
| Answer» Correct Answer - a | |
| 189. |
Largest among sulpher bacteria areA. ChlorobiumB. BeggiatoaC. ChromatiumD. Thiobacillus |
| Answer» Correct Answer - B | |
| 190. |
Bacterial flagella do not show. ATPase activity and `9+2` organization. These are chemicallyA. flagellinB. pilinC. tubulinD. bacterin |
| Answer» Correct Answer - A | |
| 191. |
Which of the following is a becterial plant disease ?A. Tikka disease of groundnutB. Downy mildew of grapesC. Ring rot of potatoD. Red rot of sugarcane |
| Answer» Correct Answer - C | |
| 192. |
Bacteria obtaining energy from oxidation of inorganic substances are calledA. ChemolithotrophsB. PhotolithotrophsC. Photo organotrophsD. Chemo organotrophs |
| Answer» Correct Answer - a | |
| 193. |
The bacteria Pseudomonas is useful because of its ability toA. Transfer genes from one plant to anotherB. Decompose a variety of organic compoundsC. Fix atmospheric nitrogen in the soilD. Produce a wide variety of antibiotics |
| Answer» Correct Answer - b | |
| 194. |
Match the type of bacteria listed in column I with their activity given in column II. Choose the correct combination of alphabets of the two columns `|{:(,underset("(Types of bacterial)")("Column-I"),,underset("(Activity)")("Column-II")),(A.,"Steptomyces",p.,"Food poisoning"),(B.,"Rhizobium",q.,"Source of antibiotics"),(C.,"Nitrosomonas",r.,"Nirogen fixation"),(D.,"Acetobacter",s.,"Nitrification"),(,,t.,"Vinegar synthesis"):}|`A. A=q, B=r, C=p, D=tB. A=q, B=r, C=s, D=tC. A=s, B=t, C=p, D=rD. A=t, B=p, C=r, D=s |
| Answer» Correct Answer - b | |
| 195. |
The poisonous substances comonly produced by bacteria are known asA. toxins (exotoxins)B. auxinsC. antibioticsD. antitoxins |
| Answer» Correct Answer - A | |
| 196. |
Cyanophyceae has gotA. Definite nucleus and plastidB. No definite nucleus but plastidC. Neither definite nucleus nor plastidD. Definite nucleus but no plastid |
| Answer» Correct Answer - c | |
| 197. |
Waksman got the Noble Prize for the discovery ofA. penicillinB. chloromycetinC. streptomycinD. neomycin |
| Answer» Correct Answer - C | |
| 198. |
Tetanolysin is produced byA. Mycobacterium lapraeB. Clostridium botulinumC. Clostridium tetaniD. None of the above |
| Answer» Correct Answer - C | |
| 199. |
Cyanophyceae has gotA. difinite nucleus and plastidB. no definite nucleus but plastidC. neither definite nucleus nor plastidD. definite nucleus but no plastid |
| Answer» Correct Answer - C | |
| 200. |
Marsh gas is produced byA. mycoplasmaB. myxobacteriaC. methanogensD. halophiles |
| Answer» Correct Answer - C | |