Carbohydrates, proteins and lipids are required by humans. The digestive system breaks down large molecules. Nutrients are passed to other organisms in a food web. Enzymes are biological catalysts.
What do the arrows in a food chain show?
The transfer of biomass
What eats what
How many organisms are at each trophic level
What molecules are the building blocks of proteins?
What molecules are the building blocks of carbohydrates?
Which of these foods is high in protein?
Which of these is small enough to be absorbed into the blood?
What do plants use cellulose for?
Making cell membranes
Making cell walls
What process joins amino acids together?
What are the subunits of lipids?
Fatty acids and glycerol
Starch is an example of which type of food molecule?
How many fatty acid molecules make up a lipid?