Chemical Reactions and Enzymes

Group of substances made up of carbon, hydrogen, and oxygen, where energy and the structural elements of living systems are stored.

• water

• carbohydrates

• proteins

• lipids

Substances formed by simple units called amino acids.

• water

• proteins

• carbohydrates

• lipids

Substances formed by carbon, hydrogen and a small amount of oxygen that don't mix with water.

• proteins

• enzyme

• lipids

• carbohydrates

The process of breaking food down into smaller parts the body can use is called:

• digestion

• respiration

• photosynthesis

The set of organs responsible for receiving, transforming and absorbing food for cells to use is the:

• excretory system

• digestive system

• respiratory system

• nervous system

The chemical agents responsible for breaking down large molecules of food nutrients intro smaller molecules are called:

• enzymes

• amino acids

• nucleic acids

• carbohydrates

Digestion begins in the:

• mouth

• stomach

• intestine

What elements does water contain?

• hydrogen and ozone

• hydrogen and oxygen

• oxygen and helium

What did you learn in today's class?