Practice free Microbes and Human Welfare (Botany) NEET multiple-choice questions online with instant answers and detailed explanations. No login required.
By BOD which one is to be measured?
By Biochemical Oxygen Demand (BOD) presence of organic matter in water can be measured.
Match the following Column-I (P) BOD (Q) Flocks (R) Encilage (S) Biogas Column-II (i) Food for cattle (ii) Association of Bacteria and filaments of mold in water (iii) Measure of the organic matter in a water (iv) Anaerobic metabolism on bio-waste
To match the terms correctly: (R) Encilage is food for cattle (i), (Q) Flocks are associations of bacteria and filaments of mold in water (ii), (P) BOD is a measure of the organic matter in water (iii), and (S) Biogas is produced through anaerobic metabolism on bio-waste (iv). Therefore, the correct match is option o1: (R-i) (Q-ii) (P-iii) (S-iv).
Match the following Column-I (P) Rhizobium (Q) Anabaena (R) Azatobactor (S) Glomus Column-II (i) Leguminous (ii) Autotroph Nd2d-fixative (iii) Free living Nd2d-fixative (iv) Phosphorus absorption
To match the terms correctly: (P) Rhizobium is associated with leguminous plants (i), (Q) Anabaena is an autotroph and a nitrogen-fixing cyanobacterium (ii), (R) Azotobacter is a free-living nitrogen-fixing bacterium (iii), and (S) Glomus is involved in phosphorus absorption (iv). Therefore, the correct match is option o1: (P-i) (Q-ii) (R-iii) (S-iv).
Statement (A) and Reason (R) Type Question A :- Dung of cattle is used to produced biogas. R :- There are large number of methenogonic bacteria in dung of cattle.
Both the assertion and the reason are true, and the reason correctly explains the assertion. Cattle dung is indeed used to produce biogas because it contains a large number of methanogenic bacteria. These bacteria break down organic matter anaerobically to produce methane, which is a major component of biogas.
An antibiotic with abroad spectrum
Which of the following antibiotics is used to cure tuberculosis?
Which of the following is not regarded as antibiotics in true sense?
What is B.O.D.
Biochemical oxygen demand (BOD) represents the amount of oxygen consumed by bacteria and other microorganisms while they decompose organic matter under aerobic (oxygen is present) conditions at a specified temperature. When you look at water in a lake the one thing you don't see is oxygen.
B.O.D is connected with
BOD refers to the biological oxygen demand by the microbes to decompose the organic matter present in the water body. Oxygen enters the water through diffusion and water has the highest potential to hold oxygen. The high temperature, untreated sewage having biotoxins, hazardous waste can reduce the oxygen to an alarming level leading to the hypoxia in fishes, whereafter enduring at the maximum level they die resultantly. This occurs because the untreated sewage is rich in organic matter and microbes utilize the dissolved oxygen for the decomposition.
During biological nitrogen fixation, inactivation of nitrogenase by oxygen poisoning is prevented by
During biological nitrogen fixation, inactivation of nitrogenase by oxygen poisioning is prevented by leghaemoglobin.
It is a red-pigment that is filled outside the peribacteroid space in the cytosol of nodule cells. It is similar to haemoglobin of red blood cells. It has the ability to combine very rapidly with oxygen and thus acts as a very efficient O2 scavenger.
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