Binding of a signal molecule to a cell surface receptor activates a which in turn activates

G-protein ; phospholipase C

Explanation:

answer: 45

explanationyou have to add as well to be it could be

image result for how many calories of energy will 20 grams of carbohydrates provide in one gram provides 4 calories

consuming the right balance of protein, carbohydrates and fat can you maintain a healthy weight and optimize your energy levels. protein and carbohydrates both contain 4 calories per gram, while fat provides 9 calories per gram.