Chloroplasts
a. resemble photosynthetic bacteria.
b. utilize the same pigments regardless of
what organism they are in.
c. apparently evolved from mitochondria.
d. utilize DNA derived from the nucleus.
e. are all of these
A
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The tRNA shown in the figure above has its end projecting beyond its end. What will occur at this end?
A) The codon and anticodon complement one another. B) The amino acid binds covalently. C) The excess nucleotides (ACCA) will be cleaved off at the ribosome. D) The small and large subunits of the ribosome will attach to it. E) The cap of the mRNA will become covalently bound.
Which of the following organisms is responsible for "sick building syndrome?"
A. Stachybotrys chartarum B. Claviceps purpurea C. Amanita phalloides D. Aspergillus nidulans
How many different aminoacyl-tRNA synthetases can be found in a given cell?
What will be an ideal response?
Which of the following represents a prezygotic barrier to reproduction?
a. hybrid sterility b. hybrid breakdown c. behavioral isolation d. hybrid inviability e. hybrid weakness