The agent responsible for causing mad cow disease is thought to be a fungus protozoan virus prion TRUE ANSWER : ? YOUR ANSWER : ?
Both Mycobacterium tuberculosis and Streptococcus pneumoniae have polysaccharide capsules stay in the lung and rarely, if ever, enter the bloodstream have cell walls that contain a high content of mycolic acids are acquired by inhalation TRUE ANSWER : ? YOUR ANSWER : ?
Cholera toxin is an A-B type toxin in which the B portions bind to a receptor on a host cell and the A portion enters the cell to cause ADP ribosylation of guanylate cyclase that stimulates production of cGMP ADP ribosylation of adenylate cyclase that stops production of cAMP ADP ribosylation of a G protein that locks it into an active form that stimulates adenylate cyclase to make cAMP cleavage of rRNA that results in disruption of ribosome function TRUE ANSWER : ? YOUR ANSWER : ?
Which of these cytokines is also known under the name cachectin? Interferon gamma None of these Interleukin 2 Tumor necrosis factor (TNF) TRUE ANSWER : ? YOUR ANSWER : ?
In the human disease cholera, what is it that actually ends up killing the victim? Dehydration and loss of nutrients the toxin produced by the bacterium Faulty carrier proteins Too little water in the food stream TRUE ANSWER : ? YOUR ANSWER : ?
Which of the following characteristic of the Rotavirus was important for the construction of the Rotashield vaccine? The ability of the Rotavirus to be transmitted faster The ability of monkey Rotavirus strains to cause serious illness (diarrhea) in human beings The possession of a segmented RNA genome A limited number of capsule types TRUE ANSWER : ? YOUR ANSWER : ?
The influenza vaccine is administered each year because mutations in the viral hemagglutinin may allow the virus to evade the immune response elicited by previous vaccines it is a polysaccharide vaccine that does not confer long-term protection None of these the vaccine is sufficiently toxic to make it necessary to administer only a small amount at any one time TRUE ANSWER : ? YOUR ANSWER : ?
An important host defense of human beings is a dense resident microbiota associated with vagina lungs bladder uterus TRUE ANSWER : ? YOUR ANSWER : ?
Each of the 3 virulence factors of Bacillus anthracis i.e. the capsule, edema toxin and lethal toxin can affect the activity of macrophages ciliated epithelial cells M cells B cells TRUE ANSWER : ? YOUR ANSWER : ?
Which of the following statements is not true regarding Mycobacterium tuberculosis and/or the disease it causes? The pathogen contains mycolic acid in its cell wall The pathogen can live inside macrophages None of these Antibodies to the pathogen are protective TRUE ANSWER : ? YOUR ANSWER : ?