Questions asked
Anand Jangid
Numerade educator
________ can induce a cytokine storm by the uncontrolled activation of T cells.
Asma Venkitta
The cholera toxin acts by: altering neural pathway signals destroying hyaluronic acid that cements cells causing an osmotic imbalance in the intestine none of the above
Viruses are not considered living organisms primarily because they Cannot reproduce by themselves Are structurally very simple Can only be visualized using an electron microscope Are typically associated with disease Are ubiquitous (found everywhere) in nature
Endogenous infections arise from microbes that are: in the patient's own microbiome in food on fomites in the air transmitted form one person to another
The lower respiratory tract has a larger normal microbiome than the upper respiratory tract. True False
Microbial hyaluronidase, coagulase, and streptokinase are examples of adhesive factors exotoxins hemolysins antiphagocytic factors virulence factors
Jenny Wu
The only part of an amino acid that differs from other amino acids is its R group.
Which of the following is essential for the growth of isolated colonies? broth medium differential medium selective medium solid medium assay medium
Bacterial transformation involves: bacteriophage carrying donor DNA to a recipient cell b) a donor cell with a plasmid and a pilus a donor cell with a plasmid and a pilus naked DNA fragments from a lysed donor cell are taken up by a recipient cell new progeny cells with genes from two parent bacterial cells none of the choices is correct
Which of the following statements is TRUE? [select all that apply] Endospores allow survival of a bacterium during harsh conditions Endospores are for reproduction Endospores are difficult to stain A cell produces one endospore and keeps growing A cell can produce many endospores Endospores can help make a bacterium a bioterrorism agent