Microbiology Pre-test Correctly Answered Questions| UpToDate | Already Graded A+

The use of chemical agents directly on exposed body surfaces to destroy or inhibit vegetative pathogens is: : antisepsis Gram-negative organisms : have a more complex cell wall Resident biota are found in/on the : Skin, mouth, nasal passages, and large intestine Viruses exhibit all the following EXCEPT : metabolism Koch's postulates are criteria used to establish that : a specific microbe is the cause of a specific disease Peptidoglyan is a unique macromolecule found in bacterial : cell walls 2 | P a g e The outcome of the Gram stain is based on differences in the cell's : cell wall Substances that are naturally produced by certain microorganisms that can inhibit or destroy bacteria are called : antibiotics The greatest number of pathogens that cause life-threatening illness enter the body through the : respiratory system All bacterial cells have: : chromosome The causes of bacterial resistance to antibiotics include : ALL CHOICES ARE CORRECT...... chromosomal mutations, prevention of drug entry into the cell, and alternations of drug receptors on cell targets Amoebic dysentery is most commonly contracted through : fecal-oral route from contaminated food or water There are fewer antifungal, anti-protozoan, an anti-helminthic drugs compared to antibacterial drugs because fungi, protozoa, and parasitic worms 3 | P a g e : are so similar to human cells that drug selective toxicity is difficult to achieve The study of the frequency and distribution of a disease in a defined population is : Epidemiology The alcohol wipe used on a patient's skin before an injection is an example of : antisepsis All communicable diseases : are caused by microorganisms or their products E. coli bacteria that normally live in the human large intestines and produce vitamin K that the body uses would be best termed a ____ relationship. : mutualistic The term ___ is given to any foreign substance that stimulates a specific immune system response. : antigen Diagnosis of viral infections sometimes involves analyzing the patient's blood for specific ____ that the immune system produces agai