Building Blocks of Life
Study Guide - Grade 7

Living things are made of cells.
Substances made of one kind of atom are elements.
Molecules are created when 2 or more atoms bond chemically.
Chemical symbols for carbon, hydrogen, oxygen, nitrogen, phosphorus, and sulfur.
Ratio of C, O, & H in carbohydrate molecules.
Elements that make up lipids.
Differentiate proteins from carbohydrates and lipids.
Muscles - protein "rich."
Subunits of protein are amino acids.
Proteins are important in their roles as enzymes, cell protection, and muscle physiology.
Carbohydrates and lipids are the first sources of energy.
There are four nucleotide bases: Adenine, Guanine, Cytosine, and Thymine
The cell membrane is made of a bilipid layer.
ATP is an important energy source.
Nucleic acids are essential in directing protein formation.