Dynamic assembly and disassembly of a cytoplasmic microtubule in a cell occurs primarily at its plus end, because its minus end is usually anchored to
A) a basal body.
B) a centromere.
C) a microtubule organizing center.
D) a mitochondrial outer membrane.
E) the plasma membrane.
Answer: C
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Which of the following is not a function of the replicative form (dsDNA) of phage phiX174?
A. Function to direct the synthesis of minus-stranded DNA. B. Function to direct the synthesis of mRNA. C. Function to direct the synthesis of plus-stranded DNA. D. Function to direct the synthesis of more RF copies.
If part of a DNA template is the sequence GTTAGTCTGTGGGCT, then the mRNA transcribed from it is
A) GTTAGTCTGTGGGCT. B) CAATCAGACACCCGA. C) CAAUCAGACACCCGA. D) gln-ser-asp-thr-arg.
In vertebrates, which of the following is not a function of calcium?
A. blood clotting B. muscle contraction C. transport of oxygen to the body's cells D. cell membrane permeability E. strengthening of bone
What is one reason why the classification of protists is difficult?
a) some protists are unicellular while other protists are multicellular b) all of the other answer choices c) protists more closely resemble members of other eukaryotic kingdoms than they do other protists d) protists may be funguslike, plantlike, or animal-like, but they do not have characteristics of more than one of these groups