

Muscle has lots of protein in it. Muscle is usually red in color. A steak from the supermarket is mostly muscle. People like to eat protein because it tastes good. Proteins are chains of amino acids.


There are many different kinds of lipids but most of them look like candle wax. Lipids won't dissolve in water. Some lipids when placed in water, make little hollow bags called vesicles.

Every cell in all living things has ribosomes which use the information in the nucleic acids to make different proteins. The ribosome is made of nucleic acids and proteins.
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