An antiseptic such as 70% alcohol dissolves lipids. It was observed that Gram-positive bacteria were more resistant to alcohol than Gram-negative bacteria. Is this an expected result? Why or why not, explain in detail.
No this is not an expected result though the gram positive bacteria has the thicker cells with peptidoglycon but still will be dissolved with the alcohol but in gram negative the membrane becomes the host and toxic. Here the alcohol further shrinks and dehydrated peptidoglycon holding the CV 1 stain in the cell wall..
An antiseptic such as 70% alcohol dissolves lipids. It was observed that Gram-positive bacteria were more...
1. Why are gram-negative bacterial more resistant than gram-positive bacteria to antimicrobial that attacks cytoplasmic targets? After viewing the videos on Spirochaetes and Neisseria, answer the following question: 12. Name 2 similarities and 2 differences between spirochaetes and Neisseria organisms?
Gram-positive and gram-negative bacteria differ in that A. Gram-positive bacteria have more peptidoglycan in their cell walls. B. Gram-positive bacteria have fimbriae but gram-negative bacteria do not. C. Gram-positive bacteria are spiral-shaped, and gram-negative bacteria are either rod-shaped or spherical. D. Only gram-negative bacteria can form endospores. E. There is no difference between gram negative and gram positive bacteria F. Gram positive are positively charged and gram negative are negatively charges An unknown bacterial species was found in the blood...
Q1: Define the difference between an antiseptic and a disinfectant. Q2: Why is the disk diffusion method a viable method for determining the effectiveness of a disinfectant? Q3: Gram negative and gram positive organisms tend to have different sensitivities to the same disinfectant. What would explain this? Q4: 100% ethanol is less effective than 70% alcohol. Why?
choose: which defense mechanism is more effective against gram positive bacteria than gram negative bacteria? a- inflammation b- B-galactosidase c- peptidyl transferase d- lysozyme
66a. If you were to design a pathogenic bacteria justify why your bacteria would be Gram-positive or Gram- negative.
Pre-Lab Questions: After staining what color will Gram positive bacteria be? What color will Gram negative bacteria be? What structure is more prominent in Gram positive bacteria than Gram negative bacteria? Why should I not spray water aggressively or directly on my bacteria on my slide?
There may be more Which of the bacteria (A-E) would you expect to be catalase positive and why? than one of the bacteria positive for catalase. A OBLIGATE AEROBE B FACULTATIVE ANAEROBE CAEROTOLERANT ANAEROBE D OBLIGATE ANAEROBEE MICROAEROPHILE Extra: In a Gram stain one step could be omitted and still allow differentiation between Gram positive and Gram negative bacteria. What is that step? Why?
List three technical reasons that a normal gram-negative cell might stain as if it were gram-positive. For each, explain the reason that this result would be observed.
Please answer the following questions NATURAL SELECTION LAB 10 Name: Section: PRE-LAB QUESTIONS - Natural Selection - Lab #10 1. In your own words explain what natural selection is and how it leads to evolution. re 2. Explain two different lines of evidence that supports the theory of evolution. 3. What is the difference between a bactericidal agent and a bacteriostatic agent? Xthin tipitial 4. What is the difference between an antiseptic and disinfect2 Give an example of each. hoito...
QUESTIONS 1) Are acid fast cells gram positive or gram negative? Explain why it might be difficult to determine the Gram reaction of acid fast cells. 2) What is the significance of the mycolic acid layer in the following contexts? A) To bacteria for survival and infection B) During the acid fast staining procedure QUESTIONS 1) What is the difference between a pure culture and a pure colony? Is a streaking for isolation plate a pure culture when your original...