Answer:
8) Answer is option D (water has a high capacity for heat).
9) Answer is option A (proteases are enzymes).
10) Answer is option C (when an enzyme catalyzes a reaction, it decreases the activation energy of the reaction).
Step-by-step explanation:
Water has the ability to absorb a large amount of heat before its temperature increases. This means it has high specific heat or heat capacity. The heat absorbed is used to break hydrogen bonds before the water molecules can begin moving faster to create kinetic energy (heat). So, it causes a relatively small change in the temperature of the water. The excess heat from the body is also removed as sweat on the skin and water vapor from the lungs. The fluids in the cells and blood (water in the human body) acts as a shield and prevent sudden temperature changes.
Proteases (peptidases or proteinases) are proteolytic enzymes that help to break down protein in the food into shorter fragments called peptides and then into amino acids. This process is called proteolysis.
In order to start a reaction, energy is required. It is called activation energy. Enzymes are used in a reaction to reduce the activation energy of that reaction. This process is known as catalysis. As the activation energy lowers, the reaction happens at a faster rate.