Antibiotics can be bactericidal (they kill the microbe) or bacteriostatic (they inhibit microbial growth, but do not kill). When observing a zone of inhibition around a disk, how would you to determine whether the antibiotic causing that zone was bactericidal or bacteriostatic?

Q: If you were developing a new “broad-spectrum” antibiotic to kill a widevariety of bacteria, which…

A: To create a broad-spectrum antibiotic it might be necessary to travel once the cell membrane, cell…

Q: Which of the following is the most important structure related to microbial attachment to cells?…

A: Flagellum is microscopic hair-like structures involved in the locomotion of a cell. The flagella…

Q: As a doctor, you come across patients whose bacterial illnesses are no longer responding to…

A: Tetracycline is an antibiotics that is used to treat the infections caused by the bacteria that…

Q: Nitrogen fixing bacteria can use atmospheric nitrogen as their sole source of nitrogen. Imagine you…

A: The microbes are grown in an artificial culture medium in a laboratory set up. These media provide…

Q: Would a syringe filter with a pore size of 0.22 micrometers be able to completely remove all…

A: Answer :  A syringe filter with a pore size of 0.22 micrometers is able to completely remove all…

Q: Why can bacterial ribosomes be targeted by antibiotics? a) Because they are different from…

A: Ribosomes Cell have tiny granular structure known as ribosomes. They are composed of ribonucleic…

Q: The following data were obtained from a disk-diffusion test. Antibiotic Zone of Inhibition 15 mm 0…

A: Let the given zones of inhibition for various antibiotics be assigned the letters for convenience as…

Q: The laboratory that you are working in does not have a microscope or motility medium. Now, how will…

A: The motility of a bacterium is determined by the presence and absence of flagella. The flagellum is…

Q: In order to transform a bacteria, the cell wall should be perforated either through physical or…

A: The cell wall is the very outer membrane of the cell. It has a rigid, semi-permeable protective…

Q: Which statement best describes why antimicrobial drugs that affect cell wall synthesis tend to have…

A: Antimicrobial drugs are the class of drugs that are used to treat a microbial infection. They…

Q: n terms of the areas of the human body, how does this discrepancy in area differ in type and number…

A: In human body, bacteria are found in  area such as skin, nose, throat, mouth, vagina, and gut. the…

Q: Describe what happens in an E. coli bacterium that has been living on the top of your fridge for the…

A: Glucose is the first carbon source used by bacteria if the glucose is present in the medium…

Q: If a bacterial species is not susceptible to an antibacterial drug at the concentration present in a…

A: Antibiotic susceptibility test is the test used to determine the effect of antibiotic to an…

Q: Which of the following bacteria possesses a spherical shape? a) E. coli b) Bacillus anthracis c)…

A: Bacteria are microscopic organisms which belong to prokaryote because these are unicellular…

Q: The original Penicillin drug causes bacterial osmotic lysis due to the breakdown of the cell wall in…

A: An antibiotic is a type of antimicrobial substance active against bacteria. They either kill(…

Q: Which of the following mechanisms of action of antibiotics has the fewest side effects?   protein…

A: As already mentioned in the question Antibiotics have mainly 5 basic mechanisms, against the…

Q: Most medically useful antibiotics interfere with either peptidoglycan synthesis or ribosome…

A: Antibiotics are the antimicrobial drugs that prevent the growth of bacteria. These antibiotics have…

Q: You are using bacterium E.coli to synthesize a protein from recombinant DNA. The protein remains in…

A: Escherichia coli is one among the organisms of selection for producing recombinant proteins. It's…

Q: Besides dehydrated foods, how might the amount of water available to microbes be decreased? Group of…

A: Dehydration is a method that has been used for centuries to preserve foods such as raisins, etc. It…

Q: In the antibiotic disc diffusion study, the "Minimal Inhibitory Concentration" or MIC of the…

A: Antibiotic disc diffusion study is also known as the Kirby-Bauer method in which the…

Q: We have discussed several bacterial structures that make good targets for antibiotics. Describe the…

A: Antibiotics are those antimicrobial agents which act against microorganisms especially bacteria.…

Q: Penicillin uses which mechanism of antibiotic action against bacterial cells?

A: Penicillin is a narrow-spectrum antibiotic which kills bacteria by binding the beta - lactam…

Q: Which of the following statements about antibiotics is TRUE? a) Antibiotics are used to disinfect…

A: Microorganisms are small organism that cannot be seen by naked eyes. Microorganism can be harmful to…

Q: Penicillin is an antibiotic. It kills bacteria by preventing the formation of the peptidoglycan…

A: Penicillin–It is the most important for the welfare of human society. Penicillin is commonly called…

Q: If you were to analyze three separate colonies from the plate above, would you expect them all to be…

A: Microbes, which are tiny and nearly invisible, have had a huge influence on society since the…

Q: Which antibiotic affects cell wall synthesis?a)streptomycin b) erythromycin c) tetracycline…

A: Antibiotics are a form of antimicrobial drugs that fight against disease-causing pathogenic…

Q: Microorganisms degrade chemicals for the following reason(s): Select one: Obtain source of usable…

A: Microorganisms are the tiny forms of life which are outside the visual capabilities of human eyes.…

Q: Can the results of an MIC test be used to determine whether an antibiotic is bactericidal or…

A: No, the results of an MIC test can't be used to determine whether an antibiotic is bactericidal or…

Q: During the fall 2001 bioterrorist attack in which anthrax endospores were sent through the mail, one…

A: Introduction: Spores are the extremely resistant resting-state that are made at the time of…

Q: Many pathogenic bacteria are unable to make some of the metabolic compounds needed for growth and…

A: Bacteria are simple living unicellular organisms that have a cellular level of organization. They…

Q: Shang-Chi observed the following regarding a bacterium isolated from his newfound suit. All of them…

A: Antibiotics are antibiotics that are used to treat bacterial illnesses in humans and animals. They…

Q: antibiotic

A: Antibiotics, also known as antibacterials, are medications that destroy or slow down the growth of…

Q: After a sufficient incubation period, bacterial growth occurred except in the zones of inhibition…

A: Antibiotics can be defined as a chemical compound ; generally releases by the microorganisms ; that…

Q: Why are bacteria generally resistant to hypotonic environments, whereas animal cells are not?

A: Bacteria is a member of a large group of unicellular microorganisms. It is classified into different…

Q: When applying a disinfectant to kill microbes, our bead experiment showed that what two factors…

A: The disinfectants are the compounds that destroys or inactivates the microbes given it is on an…

Q: In an experiment, the bacteria were placed in dropper bottles containing glycerol as a carbon…

A: The purpose is to kill any previous bacteria on the loop before it is exposed to the bacteria. The…

Q: Consumers are advised to avoid stuffing a turkey the night before cooking (where the stuffing would…

A: Temperature abuse is concept in the food safety  in which the food is not exposed to the proper…

Q: In the petri dish in Figure 1, the bacteria Esherichia coli (E. coli) was grown and treated with…

A: `E.Coli - E.Coli or Escherichia coli is a type of bacteria that normally lives in your intestines.…

Q: The majority of antibiotics used in the clinic aremade as natural products by bacteria. Why do you…

A: Prokaryotes are the primitive organisms that were the first to develop and harness life on Earth.…

Q: Which of the following BEST describes an agent that is bacteriostatic? A) It suspends bacterial…

A: Correct answer is D

Q: You contract an infection from an unknown pathogenic organism. Your doctor conducts a biochemical…

A: Given:  The person contracts an infection from an unknown pathogenic organism. The doctor conducts a…

Q: If you do not have a microscope or even a hand lens, how will you know that microorganisms exist in…

A: Micro-organisms as the the word suggest can be unicellular or multicellular but are microscopic.…

Q: In a series of infection experiments, a researcher discovers that the ID50 value for the infectious…

A: A pathogen is a microorganism that can be a bacteria, virus, protozoan, etc. which has the…

Q: When the microbes were exposed to different temperatures how was it possible to see minimal growth?…

A: Microorganisms are divided into different groups depending on their optimum growth temperatures.…

Q: in microbiology, are there technologies that can help make bacterial culture and sensitivity done…

A: As we know Microorganisms are present everywhere and affecting Humans in positive and negative way.…

Q: How would you determine if a disinfectant or antiseptic is bactericidal or bacteriostatic

A: A bacteriocide is a chemical substance that kills bacteria. They can be disinfectants, antibiotics,…

Q: There are many antibiotics that target the bacterial cell wall, but there are few antibiotics that…

A: The antibiotics are medicines that help stop infections caused by bacteria.They do this by killing…

Q: How will you determine whether the antibiotics kill the organism or only inhibit its growth

A: Microbiology is the branch of biology that deals with study of organisms that are too small to be…

Q: ium that causes Hansen’s disease (leprosy), Mycobacterium leprae, infects mostly the extremities of…

A: A chronic infectious disease caused by Mycobacterium leprae is refers as leprosy. The pathogen of…