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- Microbiology BIOL 2420 Question 6 Suppose you do this test on a hypothetical Staphylococcus species with the antibiotics penicillin (P10) and chloramphenicol (C30). You record a zone of inhibition size of 25 mm for both disks. Which antibiotic would be more effective against this organism? Question 6 options: a) both would be equally effective b) chloramphenicol c) penicillinQ 1 a) The bacterial slime layer is generally made of polysaccharides (called glycocalyx) and might be irregular over the surface of cells. Whereas capsules have a unique proteinaceous structure and are uniform over the cell. True False b) Which of the following describe the reason we use differential media Allows certain microbes to grow Brings out visible differences among microorganisms based on their specific functions We use this media when we don't want some bacteria to grow in our plates None of the above is correct c) Only a minority of all microorganisms are pathogenic or cause food spoilage True False d) In an agar plate, each ----------- represents a --------------- bin the original sample. Cell, Colony Colony, Cell Cell, Generation Hour, Generation timeA microbe is only capable of growth at pH range of 8.5-10 in the presence of atmospheric levels of oxygen. Which statements are correct? Mark all that apply. A.)The microbe is likely to be a human pathogen B.)The microbe is a mesophile C.)The microbe is an obligate aerobe D.) The microbe is an alkiliphile
- Pregunta 7 Diluting a culture of bacteria to detemine the cancentration OC) Generally not required for well-established E. ull cultures O (D) Both A and B are correct O A) Performed on a liquid bacterial culture to determine the type of organism present O (B) Involves the use of spread plating Pregunta 8 Preparing a cell extract O (B) May involve the use of a detergent O (D) A-C are correct OWs done to prepare a sample for chromatography O (C) May involve the use of an enzyme Pregunta 9 Preparing a cell extract as we did in class O A Resulted in a cell extract with all denatured proteins pok O (C) Both B and D are correct O (B) Involved SDS orm oring O (D) Resulted in a cell extract that maintalned protein tertiary structures Teams5 18 Listen Which of the following is NOT a chemical method of microbial control? a) refrigeration Ob) ethyl alcohol c) bleach d) phenol compoundsIn microbiology, the term growth in a culture usually refers to an increase in O 1) the number and size of microbial cells. O 2) the amount of ATP consumed. O 3) a microbe's size. O 4) the number of microbial cells. 5) the amount of ATP produced.
- The thermal death point is best described as:(a) The highest temperature that will support growth of amicrobial culture(b) The length of time required for killing 100% of mi-crobes in a 24-hour culture that is heated to 100°C(c) The temperature at which a previously growing 24-hourculture will begin to die(d) The temperature at which 100% of the microbes in a24-hour culture will be killed in 10 minutesQ5 Endospores are very resistant to heat, drying, radiation and chemicals.A) TrueB) FalseHelping tags: biology, microbiology, food microbiology, microbial growth, microbial death Analyze figures 2.7 and 2.8. 1. Guide questions: a) What range of time and temperature combinations poses the highest risk? How do you say so? b) Explain briefly why hazards and risks decrease as temperature decreases from 55oC upwards. c) Discuss briefly why after 100 hours, the risk decreases even if the temperature is optimal for growth of pathogens. d) Write a conclusion explaining the relationship between time and temperature as illustrated in the 2 figures. . . . WILL UPVOTE, just pls help me answer the questions. Thanks.
- 2:30 Enter title... a) pH of less than 4 b) pH of more than 9 c) 95 degrees C Notepad Free d) 25% salt concentration e) All V Which of the following would be considered "extreme" environmental conditions for microbes? PCP a 1 3 4 qw e r ?123 of these are extreme conditions 2 GIF s d N SAVE X 4G 6 176% fghj UNDO 5 7 8 9 ty u i O ik kl р C vbnm Ⓡ 1 012. A differential media a) allows visual distinction between bacteria to perform a specific biochemical process b) inhibits the growth of certain bacteria c) will only grow Gram-negative bacteria d) is a selective mediaIn the exponential phase of microbial growth, Log cell numbers Time O a) net cell growth is equal to net cell death. Ob) net cell growth is greater than net cell death. c) waste accumulates, cell death is greater than cell growth. d) the cells stop growing.