Description : Which one of the following pairs is wrongly matched? (a) Yeast - Ethanol (b) Streptomycetes - Antibiotic (c) Coliforms - Vinegar (d) Methanogens - Gobar gas
Last Answer : c) Coliforms - Vinegar
Description : Azotobacter and Beijerinckia are the examples of (a) Symbiotic nitrogen-fixers (b) Non-symbiotic nitrogen-fixers (c) Ammonifying bacteria (d) Disease causing bacteria
Last Answer : Ans. ((b))
Description : What are denitrifying bacteria?
Last Answer : Denitrifying bacteria are presenting the soil and reduce the amount of nitrogen in the soil thus damaging soil fertility.
Description : Select the mismatch. (a) Gas vacuoles – Green bacteria (b) Large central vacuoles – Animal cells (c) Protists – Eukaryotes (d) Methanogens – Prokaryotes
Last Answer : (b) Large central vacuoles – Animal cells
Description : Select the correct statement from the following. (a) Biogas is produced by the activity of aerobic bacteria on animal waste. (b) Methanobacterium is an aerobic bacterium found in rumen of ... sludge-sediment in settlement tanks of sewage treatment plant is a rich source of aerobic bacteria.
Last Answer : (d) Activated sludge-sediment in settlement tanks of sewage treatment plant is a rich source of aerobic bacteria.
Description : name the mode of nutrition in nitrifying bacteria -Biology
Last Answer : answer:
Description : In nature, ammonia is synthesisd by nitrifying bacteria using enzymes while in industry it is manufactured from `N_(2)` and `H_(2)` using iron oxide c
Last Answer : In nature, ammonia is synthesisd by nitrifying bacteria using enzymes while in industry it is manufactured from ... use nitrates in place of `N_(2)`.
Description : Nitrifying bacteria are
Last Answer : Nitrifying bacteria are
Description : What are nitrifying bacteria?
Last Answer : These are the bacteria, which convert ammonia into nitrates and then to nitrates, enhancing the amount of nitrogen in the soil.
Description : Nitrifying bacteria (a) oxidise ammonia to nitrates (b) convert free nitrogen to nitrogen compounds (c) convert proteins into ammonia (d) reduce nitrates to free nitrogen.
Last Answer : (a) oxidise ammonia to nitrates
Description : Select the correct combination of the statements (i-iv) regarding the characteristics of certain organisms. (i) Methanogens are archaebacteria which produce methane in marshy areas. (ii) Nostoc is a filamentous blue-green alga which fixes ... iii) (c) (ii), (iii) and (iv) (d) (i), (ii) and (iv).
Last Answer : (d) (i), (ii) and (iv)
Description : Which one of the following is NOT a genus within the gram-positive bacteria? a. Staphylococcus b. Methanogens c. Mycoplasma d. Bacillus and Clostridium
Last Answer : b. Methanogens
Description : Sulphur can be utilized by bacteria in the form of a. Organic compounds b. Inorganic compounds c. Elemental compounds d. All of the above
Last Answer : Ans: A
Description : How is biogas produced? Why it is called ‘Gobar gas plant’ in rural area? -SST 10th
Last Answer : (i) Biogas is produced from shrubs, farm waste, animal and human wastes.It is mostly used for domestic consumption in rural areas. (ii) Decomposition of organic matter yields gas, which has higher thermal ... It prevents the loss of trees and manure due to burning of fuel wood and cow dung cakes.
Description : The digester of a Gobar gas plant is a (A) Mild steel drum (B) Stainless steel vessel (C) Masonry well (D) Cast iron vessel
Last Answer : (C) Masonry well
Description : Gas holder of a gobar (cow-dung) gas plant is made of (A) Molybdenum stainless steel (B) Tin (C) Mild steel (D) Aluminium
Last Answer : (C) Mild steel
Description : Main constituent of the gas produced from a gobar gas plant is (A) CO2 (B) CH4 (C) H2 (D) CO
Last Answer : (B) CH4
Description : Explain working of Gobar Gas plant with a neat sketch.
Last Answer : It is a type of composting plant. In this plant gobar gas is produced from solid waste which is biodegradable in nature. A mixture of gases is produced by breakdown of organic matter in the absence of ... Dioxide. It is used as a fuel and the digested sludge is used as fertilizer for crops
Description : The biological process in which both aerobes and anaerobes degrade organic matter is - (1) Manuring (2) Composting (3) Digesting (4) Nitrifying
Last Answer : (2) Composting Explanation: Composting is the depomposition of plant remains and other once-living materials to make an earthy, dark, crumbly substance that is excellent for enriching soil. It is the chief way to recycle wastes.
Description : The biological process in which both aerobes and anaerobes degrade organic matter is (1) Manuring (2) Composting (3) Digesting (4) Nitrifying
Last Answer : Composting
Description : What are methanogens? -Biology
Description : What is the scientific name for methanogens? -Biology
Description : Why are methanogens autotrophs? -Biology
Description : What are methanogens and where do they live? -Biology
Description : Methanogens example -Biology
Description : Which of the following are true archaebacteria? (1) Extreme halophiles (2) Extreme thermophyles (3) Methanogens (4) Presence of peptidoglycan cell wall Ans. (a) 43; Which of the following are ... plants ? (1) Saintpaulia ionantha (2) Ceratozamia hildae (3) Punica granatum (4) Senecio hadrasomum
Last Answer : Ans. ((c))
Description : Organisms called methanogens are most abundant in a (a) sulphur rock (b) cattle yard (c) polluted stream (d) hot spring.
Last Answer : (b) cattle yard
Description : The guts of cow and buffalo possess (a) methanogens (b) cyanobacteria (c) Fucus sp. (d) Chlorella sp.
Last Answer : (a) methanogens
Description : The primitive prokaryotes responsible for the production of biogas from the dung of ruminant animals, include the (a) methanogens (b) eubacteria (c) halophiles (d) thermoacidophiles.
Description : Methanogens belong to (a) eubacteria (b) archaebacteria (c) dinoflagellates (d) slime moulds.
Last Answer : (b) archaebacteria
Description : Match the organisms in column-I with habitats in column-II. Column-I Column-II A. Halophiles (i) Hot springs B. Thermoacidophiles (ii) Aquatic environment C. Methanogens (iii)Guts of ruminants D. Cyanobacteria (iv) Salty area Select the correct ... , C-(ii), D-(i) (d) A-(ii), B-(iv), C-(iii), D-(i)
Last Answer : (a) A-(iv), B-(i), C-(iii), D-(ii)
Description : The acetate-utilizing methanogens are responsible for A.20% of methane produced in a biogas reactor B.50% of methane produced in a biogas reactor C.70% of methane produced in a biogas reactor D.85% of methane produced in a biogas reactor
Last Answer : C.70% of methane produced in a biogas reactor
Description : How are 'Gobar gas plants' beneficial to the farmers ? -SST 10th
Last Answer : 'Gobar gas plants' provide energy and improved quality of manure to the farmers.
Description : How are ‘Gobar Gas Plants’ beneficial to the farmers? -SST 10th
Last Answer : ‘Gobar Gas Plants’ are beneficial to the farmers in the form of energy and improved quality of manure.
Description : Which hydrocarbon is mainly present in gobar gas? -General Knowledge
Description : ‘Gobar gas’ contains mainly which gas? -General Knowledge
Last Answer : The answer is 'Methane'
Description : What does Gobar gas contains mainly? -Do You Know?
Description : Which gas is mainly found in Gobar Gas?
Last Answer : Methane
Description : The chief constituent of gobar gas is (a) Methane (b) Carbon dioxide (c) Acetylene (d) Ethylene
Last Answer : Ans:(a)
Description : Gobar gas contains mainly (a) Carbon dioxide (b) Methane (c) Ethylene (d) Carbon monoxide
Last Answer : Ans:(b)
Description : The chief constituent of gobar gas is (a) Methane (b) Ethane (c) Propane (d) Chlorine
Description : Which one of the following is a mixture of carbon monoxide and hydrogen? (1) coal gas (2) producer gas (3) water gas (4) gobar gas
Last Answer : (3) water gas Explanation: Water gas is a mixture of carbon monoxide and hydrogen produced from synthesis gas. It is a poisonous, colorless gas and burns with an almost colorless flame (light blue).
Description : The major constituent of gobar gas is – (1) Carbon dioxide (2) Methane (3) Butane (4) Isobutane
Last Answer : (2) Methane Explanation: lobar Gas (Methane) is generated by the decomposition of organic cow dung. It consists of 55-65% methane, 30-35% carbon dioxide, with some hydrogen, nitrogen ... upon the origin of the anaerobic digestion process. Landfill gas typically has methane concentrations around 50%.
Description : Which is abundant in Gobar gas? (1) Carbon dioxide (2) Methane (3) Oxygen (4) Hydrogen
Last Answer : (2) Methane Explanation: Bio gas is a clean unpolluted and cheap source of energy in rural areas. It consists of 55-70% methane which is inflammable. Bio gas is produced from cattle dung in ... called digestion. It helps in reducing the deforestation as it arrests for cutting of trees for firewood.
Description : Gobar gas contains mainly – (1) methane (2) ethylene (3) propylene (4) acetylene
Last Answer : (1) methane Explanation: Bio gas is a clean unpolluted and cheap source of energy in rural areas. It consists of 55-70% methane which is inflammable. Bio gas is produced from cattle ... ecological balance, in rural sanitation and it needs Lower capital cost and almost cost free maintenance.
Description : Gobar gas mainly contains – (1) Carbon dioxide (2) Carbon monoxide (3) Hydrogen sulphide (4) Methane
Last Answer : (4) Methane Explanation: Biogas or Lobar gas is produced by the anaerobic digestion or fermentation of biodegradable materials such as biomass, manure, sewage, municipal waste, green waste, plant material ... (CO2) and may have small amounts of hydrogen sulphide (H2S), moisture and siloxanes.