Second Messengers in Signal Transduction — MCQs

Which one of the following acts as second messenger?

Many signaling pathways involve the generation of inositol trisphosphate (IP3) and diacylglycerol (DAG). These molecules are involved in the regulation of which cellular processes?

In the mitogen activated protein kinase pathway, the activation of RAS is counteracted by

Which of the following stimulate adenylate cyclase with G-protein coupled action ?

A primigravida at 38 weeks of gestation has gone into labor. Oxytocin was started to augment labor. The second messenger system through which oxytocin acts is:

Beta 2 receptors act via which of the following secondary messenger systems

Phospholipid associated with the mechanism of hormone action is

Which of the following binds to Tyrosine Kinase receptor?

Which of the following statements about G protein-coupled receptors (GPCRs) is true?

In response to changes in Ca2+ concentration, which of the following Ca2+ binding proteins can modify the activity of many enzymes & proteins?