Why does the pH of the cooking medium influence the texture of cooked fruits and vegetables? What cookery methods need to be employed to ensure adequate, but not excessive softening of cells?
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Microbial Physiology
Microbial physiology is the branch of microbiology that is associated with studying the physiology of fungi, bacteria, and viruses. It is an important field of science concerning functional genomics and metabolic engineering.
Chemotaxis
The organism’s movement in a particular direction as a response to certain chemicals that are available in the environment is defined as chemotaxis. In brief, it can be defined as the occurrence of an organism’s movement in response to a certain chemical stimulus.
Why does the pH of the cooking medium influence the texture of cooked fruits and vegetables? What cookery methods need to be employed to ensure adequate, but not excessive softening of cells?
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- How would changing the type of bread (e.g. fresh from a bakery, no preservatives vs. prepackaged with preservatives) affect the results?The term "turbidity" in microbiology refers to: a cloudy appearance in broth, meaning microorganisms did grow a cloudy appearance in broth, meaning microorganisms did not grow a clear appearance in broth, meaning microorganisms did not grow the clump of cells at the top of a broth a clear appearance in broth, meaning microroganisms did growWhat is the major difference between Thayer-Martin and chocolate agar? When would you use Thayer-Martin rather than chocolate agar?
- Why does honey stay at room temperature for months/years without "spoiling" or being affected by bacterial growth?The autoclave uses a combination of ___ to accomplish its function: a) temperature and pressure b) chemical and thermal parameters c) Gas and pressure d) antimicrobial and inorganic parameters1)What is the natural color of cytoplasm? How is it related to our need to stain bacterial cells? 2) Which of the following is the main goal when staining a culture? A) improve contrast B) identify bacteria C) Visualize bacterial structures
- Of what practical importance are air borne microorganisms to the laboratory workers? What precautions should be taken to control laboratory contaminants? Why are petri dishes incubated in an inverted position? Of what advantage is the using a solid and a liquid medium?Why are petri dishes ALWAYS stored and incubated upside down? Question 17 options: a) helps bacteria grow b) the lid is larger and make the dish more stable c) prevents condensation from dripping on to agar surface d) so the label can be seen11. Foods can be preserved in all the followings except: a) lyophilizing b) Drying c) Salting d) Fermentation 12. The temperature of the autoclave should be held for _____ minutes at least: a) 10 b) 15 c) 20 d) 30 13. The organism used to produce soft cheese is: a) Penicillium b) lactic acid producing bacteria c) ethanol producing bacteria d) a and c
- What type of agar is MacConkey agar?A plate of raw minced meat without seasoning was left at room temperature (25°C). (i) Discuss the spoilage processes by determining THREE (3) potential intrinsic factors that are relevant to the conditions given and predict what would be the type of microorganisms that will initiate the spoilage? Identify THREE (3) preservation methods that could be easily practised at home. (ii)How moisture can be removed from food by freeze-drying method? Explain in detail.