The largest superfamily of receptors activates which of the following types of s

Question

The largest superfamily of receptors activates which of the following types of signaling pathways? a. Directly gated ion channels b. Receptor tyrosine kinases that create large signaling complexes c. G-protein-coupled receptors d. JAK-STAT pathways The enzyme that breaks PIP_2 into IP_3 and DAG is a. Adenylyl cyclase b. Phosphodiesterase c. Protein kinaseA d. Phospholipase A e. Phospholipase The type of enzyme that creates a docking site when it attaches phosphate groups to specific amino acids in a peptide is a a. Phosphorylase b. Phosphodiesterase c. Serine/threonine kinase d. Tyrosine kinase e. Adenylate cyclase An enzyme that causes a change in the shape of its substrate protein through phosphorylation is a a. Serine/threonine kinase b. Tyrosine kinase c. Adenylate cyclase d. Phosphorylipase e. Phosphodiesterase Increased cAMP levels inside a cell activate a. Phospholipase A b. Phospholipase C c. Protein kinase A d. Protein kinase C e. Phosphodi

Explanation / Answer

11. A. Receptor tyrosine kinases that create large signaling complexes. they are the high affinity cell surface receptor for many polypetide growth factor, cytokinesis and hormone.

12. E. Phospholipase c, a variety of growth hormone and growth factor stimulate the hydrolysis of PIP2 by phospholipase c.

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