Streptomycin is an antibiotic that interferes with the function of the 30S subunit of the prokaryotic ribosome. What is the consequence of treating a bacteria with streptomycin?
A. Impaired protein synthesis
B. Impaired DNA synthesis
C. Impaired oxygen synthesis
D. Impaired ATP synthesis
Answer: A
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THC, the active ingredient in marijuana, mimics the function of the neurotransmitter ____, resulting in a variety of
effects including ____.
a. dopamine; increased pain perception b. norepinephrine; hallucinogens c. GABA; nervousness d. serotonin; loss of appetite e. anandamide; memory loss
Which of the following most accurately
describes the cellular activity associated with the actual passage of a nerve impulse? a. electrical discharge b. action of sodium-potassium pump c. positive feedback d. hyperpolarization followed by rebalancing e. active transport of ions
In a family, both parents have freckles and widow's peak. Both of these traits are dominant: F = freckles, W = widow's peak
What is the correct phenotypic ratio of the next generation if the parents were heterozygous? The order of the genotypes is: freckled with widow's peak; freckled, straight hairline; no freckles with widow's peak; no freckles, straight hairline. A) 9:3:1:1 B) 9:3:3:1 C) 9:1:1:3 D) 1:3:3:9
Which of the following breakfasts would be highest in carbohydrate?
a. Grapefruit half, 2 fried eggs, 3 bacon slices, 1 slice of toast with butter, coffee b. 8 ounces orange juice, 2 cups Cream of Wheat with 2 tablespoons sugar, English muffin with jelly, 1 cup whole milk c. 8 ounces orange juice, 1/2 cup fresh blueberries, 8 ounces nonfat yogurt, coffee d. 1 cup whole milk, 2 ounces sausage, 2 fried eggs, 1 slice of toast with butter