Question 2 :
Study the following statements and select the correct ones. <br/>(i) Methanogens are archaebacteria which produce methane in marshy areas. <br/>(ii)<i> Nostoc</i> is a filamentous blue green alga which fixes atmospheric nitrogen. <br/>(iii) Many members of the genus <i>Glomus</i> form mycorrhiza.
Question 8 :
Select the correct options with respect to glycocalyx in bacterial cell
Question 22 :
Some hyperthermophilic organisms, that grow in highly acidic (pH = 2) habitats, belong to the two groups which are<br/>
Question 23 :  Match the following and choose the correct combination from the options given below.<br/><table class="wysiwyg-table"><tbody><tr><td>Column A</td><td>Column B</td></tr><tr><td> (A) Eubacteria  <br/></td><td>(I)<i> Trichoderma</i></td></tr><tr><td> (B) Dinofalgellates</td><td>(II<i>) Albugo </i></td></tr><tr><td> (C) Phycomycetes</td><td>(III) <i>Gonyaulax</i></td><td> <br/></td></tr><tr><td> (D) Deuteromycetes </td><td>(IV) <i>Anabaena</i><br/></td></tr></tbody></table><br/>
Question 26 :
Bacteria that can grow in the absence of oxygen are called as
Question 28 :
Which one of the following cocci appear as bunch of grapes under microscope
Question 29 :
A growth promoting <i>rhizobacterium,</i> which produces an iron chelating substance is <br/>
Question 30 :
In the five-kingdom system of classification, which single kingdom out of the following can include blue-green algae, nitrogen fixing bacteria and methanogenic <i>Archaebacteria</i>?<br/>
Question 34 :
Choose the correct answers from the alternatives given.<br>Which one of the following is not true of organisms included in the kingdom Monera?
Question 35 :
Which of the following bacteria is present in the rumen of cattle ?
Question 36 :
If organisms on the earth start dying, which group of organisms will be the last to die?
Question 43 :
Which of the following organism created an oxidizing atmosphere on earth?
Question 46 :
Which of the following contains prokaryote organisms capable of surviving in extreme conditions of heat and salt concentration?
Question 48 :
Of the following, the two bacterias used in genetic engineering are
Question 52 : Match the types of bacteria listed in column I with their <br/>activity given in column II. Choose the correct combination<br/>of alphabets of the two columns <br/><br/><table class="wysiwyg-table"><tbody><tr><td>Column-I<br/>(Types of bacterial)<br/></td><td>Column-II<br/>(Activity)<br/></td></tr><tr><td>A. Streptomyces<br/></td><td>p. Food poisoning<br/></td></tr><tr><td>B. Rhizobium <br/></td><td>q. Source of antibiotics<br/></td></tr><tr><td>C. Nitrosomonas<br/></td><td>r Nitrogen fixation<br/></td></tr><tr><td>D. Acetobacter<br/></td><td>s. Nitrification<br/></td></tr><tr><td><br/></td><td>t. Vinegar synthesis <br/></td></tr></tbody></table>
Question 55 :
<i>Escherichia coli</i> is used extensively in biological research as it is
Question 58 :
Choose the correct answers from the alternatives given.<br/>Which bacteria produces methane as byproduct
Question 78 :
<i>Thermus aquaticus</i> is a species of bacteria found living in the hot springs in Yellowstone National Park. Hot springs typically are areas characterized by low oxygen levels, low light levels and high concentrations of sulfur and calcium carbonate.<br/>In what way do bacteria living in or near hot springs most likely make food?
Question 81 :
Study the following lists.<br/>                List-I                                                        List-II<br/>(A) <i>Corynebacterium glutamicum </i>                     (I) Flexibility in shape<br/>(B) <i>Halobacterium   </i>                                           (II) Mineralisation<br/>(C) <i>Cristispira       </i>                                              (III) Lysine<br/>(D) <i>Bacillus mycoides</i>                                         (IV) Gas vacuoles<br/>                                                                             (V) Parasite on bacteria<br/>The correct match is
Question 83 :
Assertion: All food chains will come to stand still if bacteria disappear from earth.
Reason: Bacteria are only associated with the soil fertility and hardly have any role in food chains.
Question 84 :
Bacteria which are found in marshy areas and among the flora of cattle rumen are called
Question 88 :
Read the following statements regarding methanogens and select the correct option<br/>i) They are included in the group Archaebacteria.<br/>ii) They are responsible for the production of biogas in gobar gas plants.<br/>iii) They live in hot sulphur springs.<br/>iv) They are strictly anaerobic.
Question 89 :
An organism that shows sexual reproduction but lacks a proper nucleus in its cells. It can obtain nutrition in autotrophic as well as heterotrophic mode and posses a distinct cell wall is
Question 92 : Match the columns and choose the correct combination.<table class="wysiwyg-table"><tbody><tr><td></td><td>Column I</td><td></td><td>Column II</td></tr><tr><td>(a)</td><td><i>Escherichia coli</i></td><td>(i)</td><td>Nif gene</td></tr><tr><td>(b)</td><td><i>Rhizobium melitoti</i></td><td>(ii)</td><td>Digest hydrocarbons of crude oil</td></tr><tr><td>(c)</td><td><i>Bacillus thuringiensis</i></td><td>(iii)</td><td>Human insulin production</td></tr><tr><td>(d)</td><td><i>Pseudomonas putida</i></td><td>(iv)</td><td>Biocontrol of fungal disease</td></tr><tr><td></td><td></td><td>(v)</td><td>Biodegradable insecticide</td></tr></tbody></table>
Question 95 : Match the columns and find the correct answer<table class="wysiwyg-table"><tbody><tr><td></td><td>Column I</td><td></td><td>Column II</td></tr><tr><td>(a)</td><td><i>Streptomyces</i></td><td>(p)</td><td>Food poisoning</td></tr><tr><td>(b)</td><td><i>Rhizobium</i></td><td>(q)</td><td>Source of antibiotic</td></tr><tr><td>(c)</td><td><i>Nitrosomonas</i></td><td>(r)</td><td>Nitrogen fixation</td></tr><tr><td>(d)</td><td><i>Acetobacter</i></td><td>(s)</td><td>Nitrification</td></tr><tr><td></td><td></td><td>(t)</td><td>Vinegar synthesis</td></tr></tbody></table>
Question 96 :
Read the following statements about four kinds of microorganisms P, Q, R, and S.(i) P converts milk into curd.<br/>(ii) Q is used for making antibiotics.<br/>(iii) R contains RNA as genetic material and causes the reduction in immunity of its host.<br/>(iv) S is used to manufacture wine and beer.<br/>Select the correct option.
Question 98 :
Spirochaete bacteria are exceptional in showing fast locomotion through thick mucus because of the presence of
Question 101 :
State whether the following statements are true or false.<br>Methanogens are among the most recently evolved monerans.
Question 103 :
Select the correct combination of statements (a-d) regarding the characteristics of certain organisms.<br/>(a) Methanogens are archaebacteria which produce methane in marshy areas.<br/>(b) Nostoc is a filamentous blue-green alga which fixes atmospheric nitrogen.<br/>(c) Chemosynthetic autotrophic bacteria synthesize cellulose from glucose.<br/>(d) Mycoplasma lacks a cell wall and can survive without oxygen.<br/>The correct statements are
Question 106 : Match column I and II and select the correct option. <br/><table class="table table-bordered"><tbody><tr><td> </td><td> List I</td><td> </td><td> List II</td></tr><tr><td> A</td><td> Aerobic</td><td> 1</td><td><i> Frankia</i></td></tr><tr><td> B</td><td>Non-photosynthetic bacteria<br/></td><td> 2</td><td><i> </i><i>Azospirillum</i></td></tr><tr><td> C</td><td><i> Casuarina</i></td><td> 3</td><td> <i>Clostridium</i></td></tr><tr><td> D</td><td> Tropical grasses</td><td> 4</td><td><i> Azotobacter</i></td></tr></tbody></table>
Question 110 :
Select the correct matches.<br/>(a) <i>Nitrosomonas</i> - nitrite to nitrate<br/>(b) <i>Thiobacillus </i>- denitrification<br/>(c) <i>Nostoc </i>- free-living nitrogen fixer<br/>(d) <i>Azotobacter </i>- anaerobic nitrogen fixer
Question 111 :
Highly resistant thick walled spores produced by bacterial cells during unfavourable conditions are called as
Question 112 :
A bacterium is capable of withstanding extreme heat, dryness and toxic chemicals. This indicates that it is probably able to form
Question 113 :
Thin thread like bacteria, which apsears like fungal hyphae are known as
Question 115 :
The factor which influences unicellular organisms to keep spherical shape is
