Which of the following is not a difference between prokaryotic and eukaryotic gene expression?
A. In prokaryotes, transcription and translation can be done simultaneously.
B. Eukaryotic mRNAs are extensively processed before translation.
C. Prokaryotic mRNAs have very short half-lives.
D. Bacterial mRNAs contain no untranslated regions.
E. Prokaryotic mRNAs may be polycistronic.
Ans: D
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Which of the following is not a shape seen in prokaryotes?
A. Spheres B. Rods C. Spirals D. Icosahedrals
Which of the following solutes would NOT
leave the vertebrate body under normal conditions? a. uric acid b. ammonia c. urea d. carbon dioxide e. glucose
Blood calcium levels will increase under the influence of ________, and decreases under the influence of ______.
Fill in the blank(s) with the appropriate word(s).
The 1-m height attainable by Dawsonia moss is at the upper end of the size range reached by mosses. What accounts for the relative tallness of Dawsonia?
A) the cuticle that is found along the ridges of "leaves" B) "leaves" that are more than one cell layer thick C) reduced size, mass, and persistence of the sporophytes, which allows gametophores to grow taller D) the presence of conducting tissues in the "stem"