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Explain the Voges Proskauer (VP) Test?
As it has been discussed in previous exercise, second group of enteric bacteria produces acid during early incubation which rapidly converted to non-acidic components, i.e., 2, 3 butanediol and acetoin (acetylmethylcarbinol). These components can be detected by using Barritt's reagent, which is a mixture of alcoholic alpha-naphthol and 40% potassium hydroxide solution.
Acetylmethylcarbinol is oxidized to a diacetyl compound in presence of the alpha-naphthol catalyst and a guanidine group present in the peptone of MR-VP medium. This results in formation of a pink complex imparting rose red colouration to a medium after 15 minutes. Development of rose red colour indicates positive VP reaction while absence of it is a negative result.
Which type of reproductive structure has a better chance of survival if there was a sudden temperature change in its environment? A.)asci B.)zygosporangium C.)basidium D.)lichen
The signals for parturition originate from: 1. placenta only 2. placenta as well as fully developed foetus 3. oxytocin released from maternal pituitary 4. fully develop
Q. What are sarcomeres? Sarcomeres are the contractile units of the muscle tissue formed of alternating myosin blocks (thick filaments) and actin blocks (thin filaments). Sever
Explain about the Commercial Sterility? It is important to remember that bacterial destruction is a logarithmic function, complete destruction not probable to make food commerc
what is the bioindicator of water pollution.
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Syncytial Theory - Metazoa This theory suggests that the ancestral metazoan was at ,first Syncytial in structure but later became cellularised by formation of cell membranes
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What is the type of digestive system present in beings of the phylum Arthropoda? Are these animals protostomes or deuterostomes? The digestive tube of arthropods is complete, h
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