The genetic code is ________.
A. the complementary base-pairing of A going with T and C going with G
B. our genome
C. our DNA, in other words what makes us who we are
D. what allows codons to be translated into amino acids
Answer: D
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What would happen if snRNPs did not recognize the branch point within an intron?
A. A 3' poly A tail would not be added to the transcript. B. A 5' cap would not be added to the transcript. C. snRNPs would not base-pair with the 5' end of the intron. D. A lariat would not form.
Which of these drugs is used to treat cases of tuberculosis?
A. aminoglycosides. B. vancomycin. C. penicillin G. D. synercid. E. isoniazid.
G protein coupled receptors are a large class of receptors that bind hormones as well as other signaling molecules, neurotransmitters, and even odorants. They are a major target of pharmaceutical drugs for various disorders. Typically, the drug acts as an antagonist, blocking the binding site on the GPCR. Why is the receptor a more attractive drug target than the G protein activated downstream? (Check all that apply.)
_____ It is easier to target molecules from the outside of the cell membrane, because getting drugs into the cell can be difficult. _____ Interfering with the G protein would require getting a drug across several membranes into the cell's nucleus. _____ The "G-protein" is not really a protein but just a GTP molecules, which is too small to be a possible drug target. _____ Since GPCRs are so widespread and perform many roles in the body, targeting G proteins used by multiple GPCRs would create side-effects beyond the targeted physiological function. _____ Since the GPCRs bind a variety of unique ligands, their structures are varied enough to be able to create specific targeted drugs for certain pathways. _____ It is easier to target molecules from the outside of the cell membrane, because getting drugs into the cell can be difficult. _____ The "G-protein" is not really a protein but just a GTP molecules, which is too small to be a possible drug target.
What mineral is found in horsetails that help
protect it from insects?
a. siderite b. aluminum c. silica d. feldspar e. amethyst