If you wished to design an antimicrobial agent that prevented the formation of the 70S initiation complex in bacterial translation, which molecule should be specifically be targeted?
A. Peptidyl transferase
B. IF-3
C. EF-1
D. mRNA
Answer: B
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You have been a sample of Mimivirus, which has the largest capsid diameter of all currently known viruses (600 nm) and is hexagon shaped (icosahedral). Based on your knowledge of microscopes, what would you be able to see/determine about mimiviral structure using each of the following microscopes?
a. simple compound (light) microscope b. fluorescent microscope using fluorescently labeled antibodies to a novel capsid protein c. magnetic resonance force microscope
A decrease in which hormone might cause an overproduction of stomach acids?
a. gastrin b. somatostatin c. CCK d. secretin e. GIP
Lethal genes (genes that result in the failure to develop a vital organ or metabolic pathway) are nearly always recessive. Animal breeders who discover a unique trait and selectively breed to increase the occurrence of that trait often encounter a noticeable increase in lethal genes. Why?
A. "Pleiotropy"-the gene that is being selected for this trait may have the second effect of being lethal. B. The lethal recessive gene may be incompletely dominant. C. Spreading the gene among offspring of both sexes will increase the likelihood it will be sex-linked and expressed. D. "Epistasis"-selection for the desired trait may result in "uncovering" the lethal gene. E. The selective-mating of closely related individuals, or inbreeding, increases the chances that two recessive genes will "meet" in offspring.
Which of the following is not a genetically engineered drug?
A. Glyphosate B. Growth factors C. Factor VIII D. Interferons E. Interleukins