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Actinomycetes & Non Sporing Anaero.
Algae
Antibody
Antigen Antibody Reaction
Antimicrobial Chemotherapeutic Agent
Bacillus
Bacteria
Bacteria Morphology
Bacteriophages
Brucella
Cell Cultivations
Cell Cultures and Characteristics
Clostridium
DNA Replication
DNA Sequencing, Mutation and Repair
Energy Release and Conservation
Enzyme Reaction
Enzymes Regulation
Fish and Sea Foods
Food Illness
Fruits and Vegetables
Fungi - Molds and Yeasts
Growth and Nutrition of Bacteria
Heated Canned Foods
Hepatitis Viruses
Identification of Bacteria
Immune Response
Immune System
Industrially Useful Microbial Processes
Micro Organisms
Microbes in Aquatic Environment
Microbial Genetics
Microbial Metabolism
Microbial Recomb. & Gene Transfer
Microbiology of Foods
Microbiology of Waste Water
Microorganisms and Disease
Milk and Milk Products
Miscellaneous Foods
Mycobacterium
Nucleic Acid Structure
Physical and Chemical Agents
Polymerase Chain Reaction
Poultry, Egg and Meat
Poxviridae and Picronaviridae
Protozon
Pseudomonas and Burkholderia
Retroviridae
Rhabdoviridae, Caliciviridae & Astrovi.
Sauerkraut and Pickles
Spirochacter and Enterobacteriaceac
Staplylococcus
Streptococcus
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Home⇒ Medical Science⇒ Microbiology⇒ Microbiology of soils
1-Dont try to cram or spend more time here just read it fast and cover syllabus then practice MCQ's cheptor of same topic to check your progress. . |
2-Wrong options are also given but dont concentrate there, Right answer is in bold format. |
Q21 ⇒ Bacteria, as a group, are responsible for all of these [other wrong options] [Discuss in forum] nitrogen oxidation sulfur oxidation nitrogen fixation |
Q22 ⇒ An example of a symbiotic nitrogen fixer is Rhizobium [other wrong options] [Discuss in forum] Azotobacter Beijerinckia Clostridium |
Q23 ⇒ Denitrification may be distinguished as both (a) and (b) [other wrong options] [Discuss in forum] dissimilative assimilative blue baby syndrome |
Q24 ⇒ Denitrification is both (a) and (b) [other wrong options] [Discuss in forum] reduction of nitrate (NO3-) to nitrogen gas reduction of nitrate to organic nitrogen compounds changing of atmospheric nitrogen (N2) to nitrogen compounds |
Q25 ⇒ Assimilative denitrification is done by all of these [other wrong options] [Discuss in forum] plants fungi prokaryotes |
Q26 ⇒ The phenomenon of commensalism refers to a relationship between organisms in which one species of a pair benefits [other wrong options] [Discuss in forum] both the species of a pair benefit one species of a pair is more benefited none of the above |
Q27 ⇒ Which of the following is correct? All of the above [other wrong options] [Discuss in forum] Mycorrhizae are fungi that form a mutually beneficial (symbiotic) relationship with plant roots The fungi aid in transmitting nutrients and water to the plant roots The increased nutrient availability from mycorrhizae is thought to be due to the additional absorbing surface provided by the fungi |
Q28 ⇒ The conversion of molecular nitrogen into ammonia is known as nitrogen fixation [other wrong options] [Discuss in forum] nitrification denitrification ammonification |
Q29 ⇒ Degree of compost maturity can be assesed by both (a) and (b) [other wrong options] [Discuss in forum] infrared technique germination test none of the above |
Q30 ⇒ Most soil protozoa are flagellates or amoebas, having their dominant mode of nitrogen as ingestion of bacteria [other wrong options] [Discuss in forum] ingestion of mold ingestion of fungi all of these |
Q31 ⇒ A heterocyst is a terminally differentiated cell that fixes nitrogen [other wrong options] [Discuss in forum] a type of spore the progenitor of cyanobacterial vegetative cells a cell that carries out oxygenic photosynthesis |
Q32 ⇒ The groups of bacteria which have the ability to fix nitrogen from air to soil are both (a) and (b) [other wrong options] [Discuss in forum] symbiotic nonsymbiotic none of these |
Q33 ⇒ For rapid decomposition by microbes, the substrate should have a C/N ratio of 30-40 [other wrong options] [Discuss in forum] 43028 20-30 60-80 |
Q34 ⇒ The diagnostic enzyme for nitrogen-fixing organisms is nitrogenase [other wrong options] [Discuss in forum] nitrate reductase nitrate oxidase none of these |
Q35 ⇒ Which of the following is not the biofertilisers producing bacteria? Clostridium [other wrong options] [Discuss in forum] Nostoc Anabaena Both (a) and (b) |
Q36 ⇒ Nitrifying bacteria can not be isolated directly by the usual techniques employed to isolate hetrotrophic bacteria. The reasons may be due to slow growth [other wrong options] [Discuss in forum] medium growth fast growth none of these |
Q37 ⇒ Nitrogen fixation refers to the direct conversion of atmospheric nitrogen gas into ammonia [other wrong options] [Discuss in forum] glucose ATP nitrate |
Q38 ⇒ Nitrogen oxidation (nitrification)refers to the conversion of ammonium ions into nitrates through the activities of certain bacteria. [other wrong options] [Discuss in forum] changing of atmospheric nitrogen (N2) to nitrogen compounds sulfur is oxidized to the sulfate form through Thiobacillus bacteria none of the above |
Q39 ⇒ The physical structure of soil is improved by the accumulation of mold mycelium [other wrong options] [Discuss in forum] minerals water all of these |
Q40 ⇒ The crops which are involved in nitrogen fixation are all of these [other wrong options] [Discuss in forum] alfalfa and clover soybean bean and lupine |
Or |