Q. Cell signaling is a process by which cells communicate.

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Q. Paracrine messenger molecules are usually ________________

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Q. Endocrine messengers are also called ___________________

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Q. The primary messenger molecules bind to the transmembrane receptors.

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Q. Protein kinases and phosphatases act by altering ______________ of the signaling proteins.

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Q. To which of the following residues of the protein, the protein kinases do not add phosphate groups?

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Q. The process by which extracellular messages translate into intracellular changes is termed _________________

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Q. Steroids are derived from ________________

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Q. Which messenger molecules are derived from arachidonic acid?

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Q. G-protein coupled receptors contain ________ transmembrane alpha helices.

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Q. G-protein coupled receptors are referred to as seven-transmembrane receptors.

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Q. The G-protein coupled receptors have their _____________________ outside the cell.

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Q. On the cytoplasmic site of GCPRs, the G-proteins bind to ___________________

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Q. Which of the following is a stimulus for rhodopsin?

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Q. The inactive conformation of a G-protein coupled receptor is stabilized by ____________________

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Q. The G-proteins bind only to _________________

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Q. Desensitization is the process of blocking receptors from turning on ______________

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Q. Arrestins compete with ________________ for binding with G-protein coupled receptors.

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Q. Retinitis pigmentosa is an inherited disorder caused due to mutation in the gene that encodes for __________________

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Q. Adenoma is caused by the over-secretion of ____________________

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