Diversity among the oligosaccharide chains found in the carbohydrate coating of the cell surface can be achieved in which of the following ways?
(a) varying the types of sugar monomers used
(b) varying the types of linkages between sugars
(c) varying the number of branches in the chain
(d) all of the above
(d)
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Viruses are characterized by all of the following except
A. being found in every organism investigated so far. B. being specific to the hosts they infect. C. being capable of independent reproduction. D. being acellular.
The two layers of fluid-filled membranes that are
used to separate the lungs from other organs in humans are called a. larynx. b. pharynx. c. bronchial. d. pleural. e. none of these.
Beadle and Tatum began their studies with wild-type Neurospora. How is this organism best characterized?
a. A strain that only grows in the wild b. A mutant strain that will only grow in the lab on complete medium c. A strain that will not grow in the lab d. A virulent strain e. A normal phenotype that will grow on minimal medium
Why is there not a clinical distinction between bacteriostatic and bactericidal antibiotics?
What will be an ideal response?