Which is not true of RNA?
A. It is usually single-stranded.
B. It functions in the cytoplasm.
C.
It contains both uracil and thymine.
D. It contains ribose.
C
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Which of the following is not a function of the Drosophila Sxl protein?
A. prevention of the splicing machinery from recognizing the splice junctions of the E1 or L3 exons of the Sxl mRNA B. mediation of alternative splicing that produces transcripts for functional Tra protein C. binding specifically to the regulated 3' splice site of the tra transcript D. mediation of the splice variant of the dsx transcript leading to repression of female-specific genes
The importance of phage-mediated lateral gene transfer by virioplankton was illustrated by the fact that cyanophages thought to infect Synechococcus and Prochlorococcus carry the structural gene for ________.
A. a photosynthetic reaction center protein B. phycocyanin production C. nitrogenase D. All of the choices are correct.
What technique detects brain voltage (electrical activity) fluctuations?
a. molecular biology techniques using brain tissue b. x-rays c. positron emission tomography (PET) d. electroencephalograph (EEG) e. functional magnetic resonance imaging (fMRI)
Is it possible to be a "carrier" (phenotypically normal but capable of passing the allele to one's offspring) for Tay-Sachs Disease?
a. Yes b. No