A unique polysaccharide, derived from certain types of seaweed (algae), often used in a variety of solid media used in microbiology labs around the world is:

Which of the following choices correctly identifies the differences between tetanus and botulism with respect to their unique effect on skeletal muscles? 

To prevent light scattering while using the 100X objective lens, it is important to:

Which of the following strains of influenza are the most common human flu viruses?

Alpha hemolytic organism is the one that ________________ when inoculated on the blood agar medium.

Which of the following choices does not represent a reason that bacterial smears are heat-fixed?

While not a common staining technique, negative stains do have their uses in the lab.  Which of the following bacteria would be best visualized using a negative stain?

Which of the following diseases produces a characteristic bull’s eye rash, known as erythema migrans, when viewed within one to two weeks of the initial infection?

This event in influenza virus is a minor change resulting in small changes of structure of surface proteins HA and NA through mutations of genes that code for spike proteins. This is the primary reason why we have to update the flu vaccine composition each year. 

Because the pH scale is based on a logarithmic scale, how much more basic is pH 10 than pH 5?