Which of the following antibiotics inhibits RNA synthesis?

A) penicillin
B) erythromycin
C) rifampin
D) azithromycin


Answer: C

Biology & Microbiology

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With humans making up such a small percentage of life on Earth, which of the following represents the rationale behind spending a disproportionate amount of scientific research studying humans?

A. Humans are interested in learning how their own bodies function. B. Our role in the ecosystem needs to be understood in order to plan for our future. C. The more that is discovered about humans, the more likely it is that disease can be combatted. D. Humans are curious about their origins. E. All of the above are reasons for spending a disproportionate amount of scientific research studying humans.

Biology & Microbiology

Which type of selection would lead to two distinct phenotypes?

A. Stabilizing selection B. Phenotype selection C. Fitness selection D. Disruptive selection E. Directional selection

Biology & Microbiology

Define the terms restriction enzyme and ligase, and describe how these enzymes are used in recombinant DNA

technology. What will be an ideal response?

Biology & Microbiology

What is the purpose of protonephridia in flatworms?

a. To sense prey b. To exchange gas c. To respond to stimuli d. To regulate fluid balance e. To serve as a structure for sexual reproduction

Biology & Microbiology