Which of the following is true about second O They produce their effect by chang
ID: 216062 • Letter: W
Question
Which of the following is true about second O They produce their effect by changing in cAMP is an example of a second messenger. They are proteins O They are enzymes D Question 2 1 pts Which of the following would eventually lead to signaling being turned ON? OG protein uses its GTPase activity O Tyrosine kinase receptors dimerize O G protein binds to GPCR O G protein is bound to GDP O Tyrosines are dephosphorylated on tyrosine kinase receptors Question 3 1 pts Which of the following can lead to a change in shape and thus a change in activity? OA phosphatase removes a phosphate from a protein O A protein kinase gets phosphorylated O A ligand binds a receptor O cAMP binds a protein kinase O G protein hydrolyzes GTPExplanation / Answer
Answer to the first question
Which of the following is true about second messengers?
They produce their effect by changing in concentrations (Reason: Second messengers activate various cyclin kinases leading to a cascade of reactions. This, in turn, increases the strength of the original messenger)
cAMP is an example of second messenger (Reason: Epinephrine triggers the release of cAMP which acts as a secondary messenger and helps in the conversion of glycogen to glucose in the liver)
Answer to question 2
Which of the following would eventually lead to signaling being turned on?
Tyrosine kinase receptor dimerize. (Reason: Ligands bind to these receptors and dimerize them. This release tyrosine which undergoes trans-phosphorylation leading to a signal cascade in the plasma membrane)
Answer to question 3
Which of the following can lead to a change in shape and thus a change in activity?
A ligand binds a receptor (Reason: The binding of a ligand to a receptor causes a conformational change of the receptor. This process is called receptor activation)
Related Questions
drjack9650@gmail.com
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.