What is the role of activated protein kinases?
A) Phosphorylate proteins.
B) Degrade cAMP to AMP.
C) Phosphorylate ADP to ATP.
D) Convert ATP to cAMP by phosphorylation.
E) Activate adenylate cyclase.
A) Phosphorylate proteins.
Phosphorylation can activate different proteins causing the response of the cell to water-soluble hormone.
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A positive latex agglutination test was observed in a sample containing Cryptococcus neoformans. The specimen of choice to identify this pathogen is:
a. urine. b. blood. c. stool. d. cerebrospinal fluid (CSF).
Before messenger RNA fully matures,
a. all exons are deleted and removed. b. a poly-A tail and modified guanine “cap” are added. c. anticodons are assembled. d. the transfer RNA transfers the messenger RNA to the ribosome. e. the single RNA strand duplicates itself in much the same way as DNA.
The diet of the first primates included
a. insects. b. seeds. c. bugs. d. eggs. e. all of these.
Germ-free animals are often more susceptible to infections and serious disease than are animals with a typical complement of normal microbiota. Based on this observation, which of the following would be an appropriate conclusion?
A. Normal microbiota are incapable of causing disease B. Normal microbiota stimulate the development of the immune system C. Normal microbiota are parasitic D. Normal microbiota are opportunists E. Normal microbiota provide supplemental nutrition to the host