What is the cause of most peptic ulcers?

a. lactose intolerance
b. heartburn
c. bacteria
d. malnutrition


Ans: c. bacteria

Biology & Microbiology

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Which of the following microbial groups have members which are considered to be autotrophic?

a. fungi b. protists c. prions d. viruses e. All of the above

Biology & Microbiology

Which of the following hormones counteract each other in regulating calcium homeostasis?

A. antidiurectic hormone and aldosterone B. atrial natriuretic peptide and aldosterone C. parathyroid hormone and vitamin D (1,25 dihydroxyvitamin D) D. antidiurectic hormone and parathyroid hormone E. antidiurectic hormone and vitamin D (1,25 dihydroxyvitamin D)

Biology & Microbiology

Which layer of the eye contains an extensive blood supply?

A. lens B. sclera C. choroid D. cornea E. retina

Biology & Microbiology

An example of an "emerging virus" (a virus in a new host) with a lethality rate in excess of 50% is

A. influenza virus. B. Ebola virus. C. yellow fever. D. hepatitis B. E. variola virus.

Biology & Microbiology