The cell surface receptors that can act only indirectly on plasma membrane-bound enzymes or ion channels are called
A. enzymatic receptors.
B. second messenger receptors.
C. G protein-coupled receptors.
D. gated ion channels.
Answer: C
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Purification of waters while generating power and providing energy for monitoring environmental processes is an application of microbial fuel cells.
Answer the following statement true (T) or false (F)
Diffusion tensor imaging (DTI) is a type of ____
a. MRI b. PET scan c. X-ray d. sonogram e. CT scan
A translocation involving chromosome 21 can result in
A. a risk for Down syndrome independent of maternal age. B. a risk for Down syndrome dependent on paternal age. C. no increased risk outside of maternal age. D. lowering the risk of Down syndrome. E. no change in the risk for Down syndrome.
During which cellular process do all three forms of RNA associate?
A. protein synthesis B. ribosome assembly C. formation of the nucleolus D. chromatin formation