Answer:
The correct answer is: Serine, Histidine, Aspartate
Explanation:
The catalytic triad of an enzyme is composed of three aminoacid residues which are the most important for its catalytic activity. They are located in the catalytic site of the enzyme. In the case of chymotrypsin- a serine protease, the catalytic triad is composed by serine, histidine and aspartate (Ser-His-Asp). Serine proteases hydrolyse peptidic bonds in proteins and peptides. To do that, the histidine-which interacts with the aspartate by a hydrogen bond so its pKa increases- take a proton from the serine. Thus, deprotonated serine is able to attack the peptide bond and to perform hydrolysis.
Answer:
C.3
Explanation:
The coefficient is the number of molecules needed for a set of reactions. The different reactions will have a different coefficient, so you have to balance the reaction first by knowing all the reactants and the product the reaction. The balanced reaction for sulfuric acid and aluminum hydroxide is:
2 Al(OH)3(s) + 3 H2SO4(aq) -----> Al2 (SO4)3(aq) + 6 H2O(l)
Every set of reactions will need 3 molecules of sulfuric acid and 2 molecules of aluminum hydroxide. The coefficient in front of sulfuric acid (H2SO4) is 3.
The answer would be nuclear power.