Microorganisms living within biofilms typically use molecular to communicate wit
ID: 83108 • Letter: M
Question
Microorganisms living within biofilms typically use molecular to communicate with each to regulate density-dependent growth; this is commonly referred as _____ a. horizontal gene transfer b. quorum sensing. c. cytokine sensing. d. transduction gene transfer. Which of the following represents the best definition for microbial death? a. The organism no longer retains its original shape and structures. b. The organism will not grow on minimal medium. c. The organism will not grow on a medium that normally supports its growth. d. None of these adequately describe microbial death. The destruction or removal of all viable organisms is called _____ a. sanitization b. antisepsis. c disinfection. d. sterilization. The time required to kill 90% of the microorganisms or spores in a sample at a specified temperature is the _____ a. thermal death time (TDT). b. z value. c. decimal reduction time (D value). d. thermal death point (TDP). Moist heat sterilization at 100 deExplanation / Answer
34. Answer is b. Quorum sensing is method by which bacterial regulate the function of their colony.
35. Answers is c. Generally microbe growth is best supported in their specific nutritional media. Once they fail to grow in specific media considered their death.
36. Sterilization is the process where all the viable microorganisms will killed. Generally autoclaving or high temperature sterilization leads to destruction of all microbes. Answer is d
37. Thermal death time is specified time that need to kill the 90% of bacteria at particular temperature. It is generally used in food industry to make food item salmonella free. Correct answer is a.
38. Bacterial endospores are capable to survive at high temperature or more than 100 degree Celsius for hours. Generally radiation kills bacterial endosproe. Correct answer is b.
39. Alaxader Fleming discovered the penicillin . correct answer is a.
40. Penicillin. Correct answer is c.