Many antibiotics work by blocking the function of ribosomes. Therefore, these antibiotics will:
A) prevent the movement of proteins through nuclear pores.
B) block RNA synthesis.
C) block DNA synthesis.
D) make the two nuclear membranes fuse into one.
E) block protein synthesis.
Answer: E
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What is the purpose of DNA ligase in a cloning experiment?
A. The purpose is to proofread the vector for mistakes. B. The purpose is to reestablish the stable sugar-phosphate backbone of the DNA molecule C. The purpose is to allow the vector to enter into the cell. D. The purpose is to function as a selectable marker.
Four of the five answers listed below are probable components of the Earth's primitive atmosphere
Select the exception. a. hydrogen gas b. oxygen gas c. nitrogen gas d. carbon monoxide gas e. carbon dioxide gas
The microtubules that overlap in the center of the mitotic spindle are called _______ microtubules.
a. astral b. polar c. kinetochore d. central e. minus-end
Which statement is correct?
A. Pharyngeal clefts form internally between arches while pharyngeal pouches form externally. B. Pharyngeal clefts form externally between arches while pharyngeal pouches form internally. C. Pharyngeal Arch I grows over Pharyngeal Clefts I-IV, obliterating them. D. The ear is formed across Pharyngeal Cleft II, intervening mesenchyme, and Pharyngeal Pouch I.