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- 1. are organic proteins which can speed up the biochemical reaction that occurs mainly outside or on the microbial cell surface. 2. Clean surface waters are normally saturated with . , which can be removed rabidly in the aerobic oxidation. 3. . and .. are the most importance two measures in water quality required to stabilize the wastewater. 4. The . process are responsible to limits the polluting discharge effect and the recovery time in rivers.10. Pharmaceutical ingredients are susceptible to microbial attack. Which ONE of the following statements about contamination of a medicine is CORRECT? O Anionic surfactants are generally stable but the alkyl and alkylbenezene sulphonates are readily metabolised. O Humectants, such as sorbitol and glycerol, are readily metabolised when present in a medicine at high concentrations. O Fats and oils are usually attacked when dispersed in non-aqueous formulations. O Sweetening, flavourings and colouring agents are ready substrates for bacteria but in low concentrations are resistant to degradation. O Organic polymers used as thickening agents are subject to microbial polymerisation.The movement of mineral nutrients through organisms and their environment is called a __________cycle. biological bioaccumulation biogeochemical biochemical
- Which of the following apply to silver as a chemical inhibitor of microbial growth? Acts as a competitive inhibitor Mimics the natural substrate O Binds nonspecifically to many proteins Irreversibly binds to proteins through covalent bond Will only bind to the active site Disrupts tertiary and quaternary protein structure Can safely and effectively be used to inhibit biofilm Alters the shape of the active site7. You are instructed to determine the microbiological quality of two (2) food products, biltong (a traditional South African dried meat) and beef mince. Discuss the effect the intrinsic parameter water activity would have on the potential spoilage of these products and the type of microorganisms that would dominate the spoilage flora.29. Identify a FALSE statement from the following, Group of answer choices bacterial growth is related to nutrient concentration and availability sulfur is essential in growth medium for some amino acid synthesis none of the above is an false statement nutrients uptake can be via active or passive process culture medium must be sterile before inoculation 30. Identify a CORRECT statement regarding penicillin allergy? Group of answer choices the hypersensitive reactions are mediated by IgE penicillin is degraded to penicilloyl and other breakdown products all of the statements are correct penicilloyl haptens trigger most allergic reactions anaphylactic shock is the immediate danger penicillin can provoke
- 20. Activity involving two or more microorganisms seeking the same niche or nutrients. M 26. The addition of contaminated soil to agricultural soil with the purpose of soil microorganisms mineralizing the organic contaminant. MImagine a company producing Non-Biodegradable plastic which is polluting the local environment. 1. What arguments can you provide to this company to incur additional costs to reduce the environmental impact of the production and disposal of the plastic, even though production and disposal are performed by others?5. Soil X’s pH is measured before and after urea application, it has been noted that after the application of urea, pH decrease, which of the following processes is most likely responsible for the decrease in soil pH? A. Nitrogen fixation B. Annamox C. Nitrification D. Denitrification
- 2. Discuss how the study of microbial biofilms has evolved over time and the contribution of Bill Costerton and outline why Biofilms in biopharmaceuticals water systems are an issue....means degrading/removing environmental poisons or pollutants by microorganisms such as fungiProvide 3 reasons why soil is an excellent source for microbes especially potential antibiotic producers