题目
题目
单项选择题

Which of the following is a regulatory protein associated with second messenger systems?

选项
A.ATP
B.calcium
C.GnRH
D.G protein
E.FSH
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标准答案
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思路分析
Here we analyse each option to understand which one fits the description of a regulatory protein associated with second messenger systems. Option ATP: ATP is a small nucleotide primarily known for its role as cellular energy currency and as a substrate in various biosynthetic reactions. It is not a regulatory protein ......Login to view full explanation

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Question at position 43 The role of G proteins in neurotransmitter signaling is to:Activate adenylate cyclase, producing cAMPDirectly bind to and open ion channelsDiffuse across the membrane and bind to intracellular enzymes Inhibit ligand-gated ion channels

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G protein-coupled receptors are found only in eukaryotes. The ligands that bind to G protein-coupled receptors include a range of compounds including pheromones, hormones and neurotransmitters and range in size all the way from small peptides to large proteins. Which of the following best describes the function of the G protein?

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