A reason that some antibiotics harm bacteria, but not humans, is because the antibiotic inhibits bacterial enzymes that humans do not have.

a. true
b. false


Answer: a. true

Biology & Microbiology

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What region of the heart acts as the heart's pacemaker?

A) sinoatrial (SA) node B) atrioventricular (AV) node C) semilunar valve D) ventricle

Biology & Microbiology

The rigid chitinous exoskeleton of an arthropod has all of the following functions except it

A. prevents injury to the animal. B. impedes water loss. C. provides a place for muscle attachment. D. maintains a uniform size for all individuals of that species. E. protects the animal from predators.

Biology & Microbiology

What would be the best anatomical feature to look for to distinguish a gastropod from a chiton?

A) presence of a muscular foot B) presence of a rasp-like feeding structure C) production of eggs D) number of shell plates

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The following steps occur during biosynthesis of a + strand RNA virus. What is the third step?

A) attachment B) penetration and uncoating C) synthesis of - strand RNA D) synthesis of + strand RNA E) synthesis of viral proteins

Biology & Microbiology