BIOMOLECULES AND ENZYMES

Detailed explanation-1: -Amount of energy in a food is measured in calories. One calorie is defined as the amount of heat energy required to increase the temperature of one gram of water by one degree Celcius.

Detailed explanation-2: -Energy as kilojoules A kilojoule is a unit of measure of energy, in the same way that kilometres measure distance. Food energy used to be measured in Calories (Cal) and some countries still use those units. The conversions are as follows: 1 kJ = 0.2 Cal.

Detailed explanation-3: -Detailed Solution. The correct answer is Calories. Energy is measured in units of calories, kilocalories (kcal) or kilojoules (kJ). A calorie is a unit that is used to measure energy.

Detailed explanation-4: -A unit of heat energy used in thermochemistry is the thermochemical calorie, equal to 4.184 joules. It is commonly used as the unit for heat capacities, latent heats, and heats of reaction.