Bacteriophages engage in two interactive cycles with bacteria. What are these cycles?
A) heteroduplex and homoduplex
B) insertion and replication
C) negative and positive
D) auxotrophic and prototrophic
E) lytic and lysogenic
Answer: E
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Proper design of a urogenital swab expressly intended for the collection of urethral discharge should include what feature?
a. Charcoal-treated cotton or rayon b. Antibiotic-treated calcium alginate c. Non flexible Shaft of wood and not flexi-ble d. Dacron-tipped swabs
If the ? of surrounding soil is higher than that in living root epidermal cells, then water should
a. leave the root cells, making them flaccid. b. enter the root cells, making them turgid. c. leave the root cells, making them turgid. d. enter the root cells, making them flaccid. e. none of these accurately describe water movement.
A source for alginic acid, a thickening, emulsifying agent found in ice cream, toothpaste, pudding and cosmetics, are the:
a. seed plants b. ferns c. brown algae d. red algae e. green algae
What type of organism causes tuberculosis?
What will be an ideal response?