Some antibiotics are effective against only a limited range of organisms. What is a term you learned in the virtual lab that is used to describe this phenomenon and describe what it means.

This is from micro biology. Which box goes under which category

You will have the opportunity to explore the effectiveness of six different antibacterial substances against a certain species of bacteria. You will follow scientific procedures by questioning, forming a hypothesis, setting up and conducting an experiment, analyzing results, and forming a conclusion. You will determine the comparative effectiveness of six antibiotics. What is the dependent variable? What is the independent variable?

Why might you expect a small dose of puromycin to be less effective in repressing bacterial growth than an equivalent number of mole- cules of erythromycin?

Which of the following does NOT describe a mechanism for drug resistance? Prevention of drug entry into the cell Production of proteins that bind and sequester the drug Creation of new plasmids upon drug treatment Changes in the structure of the drug's target Inactivation of the drug by hydrolysis

Introduction: There’s quite a bit of interest around repurposing extant drugs to treat infections by targeting host pathways that pathogens rely on. Here are a few potential drugs: 1) A drug that inhibits endocytosis, but not phagocytosis. 2) A drug that inhibits degradation of cytoplasmic proteins into smaller peptides, preventing their cycling back into amino acids. 3) A drug used to treat porphyria that reduces the reactivity of heme. 4) A drug that depletes glutathione, a chemical which protects red blood cells against the reactivity of heme. 5) A drug that reduces expression of the ACE-2 protein.   Question: Pick a drug and an infection that the drug is likely to be good at treating, or pick an infection and a drug that would most likely make the infection substantially worse. Which drug and pathogen did you pick? Do you think it’ll make it better or worse?

Robert Koch developed a set of criteria (postulates) for conclusively demonstrating the aetiology (specific cause) of an infectious disease. Which of the following is not a postulate?     The infectious agent must be isolated and cultured in vitro     The disease is reproduced when a pure culture of the infectious agent is inoculated into a new susceptible host     The infectious agent can be recovered from the experimentally-infected host     The infectious agent is present in most cases of the disease

You perform a Kirby-Bauer assay with two antibiotics. Antibiotic X has a zone of inhibition of 9 mm. Antibiotic Y has a zone of inhibition of 11 mm. Which antibiotic is better at killing this particular microorganism?   Group of answer choices 1Antibiotic Y 2Antibiotic X and Y, which have identical antimicrobial activities 3Antibiotic X4 4It is impossible to tell from the information given

Why are the risks associated with antibiotics hard to understand?  Please describe in detail with reasoning in a supporting paragraph.