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Chapter 2: Chemical Basis for Life- 3

Across
A type of chemical bond formed by the electrostatic attraction between two oppositely charged atoms or molecules.
A large molecule consisting of smaller units linked together, such as a polysaccharide or polypeptide.
The group of fatty or or fatlike substances that are insoluble in water.
A molecule that contains both a lipid and a protein.
One of two or more atoms having the same atomic number but different atomic masses.
A chemical that does not contain hydrocarbon groups.
A compound containing hydrocarbon groups.
A lipid composed of 3 fatty acids and a glycerol; also known as triglycerides.
Covalent joining of one amino acid to another to form a peptide.
An electrically charged atom or molecule.
The combinations of phosphoric acid, pentose sugars, and pyrimidine or purine bases that make up nucleic acids.
Down
Chains of more than 10 amino acids; also called oligopeptides.
The smallest particle of a substance, composed of two or more atoms, that retain one amino group.
A long chain of amino acids held together with peptide bonds.
Simple sugars; single sugar molecules.
A combination of two or more substances.
Anything that has mass and exists as a solid, liquid, or gas.
A molecule composed of 3 parts: phosphorus, fatty acids, and a nitrogenous base.
To cause the pH of a solution to approach 7 (neutral).
A subatomic particle with no electrical charge that joins with the protons to make up the entire mass of the nucleus.