g Glucagon is a hormone that is released when the level of glucose in the blood is low. Glucagon uses a G protein signalling pathway to promote glycogenolysis. Put the steps of the signal transduction pathway in order after the release of glucagon into the blood before glycogen phosphorylase is activated leading to glycogenolysis. 1. Glucagon binds extracellularly to G protein-coupled receptor. 2. G protein releases GDP and binds GTP. 3. Activated G protein activates adenylyl cyclase. 4. Adenylate cyclase converts ATP to cAMP. 5. Cyclic AMP activates protein kinase A.

it's not c. i took the quiz and got it wrong. so my best guess is b.

have a great day, and hope this .

examples of nucleic acids are deoxyribonucleic acid (dna) and ribonucleic acid (rna).

answer: the correct option is d. enzyme

lactase and carbonic anhydrase are the examples of enzymes.

lactase is an enzyme, which is present in the small intestine of mammals. it in the digestion of the disaccharide, lactose ( milk sugar) by converting it into two monosachharide, which are glucose and galactose.

carbonic anhydrase is present in the red blood cells. this enzyme plays significant role in the transport of co₂. it in the conversion of co₂ and h₂o into carbonic acid, which is then dissociated into bicarbonate ions and hydrogen ions.