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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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
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.