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Biology: Chapter 3.2
Chapter 3.2 Vocabulary
Term | Definition |
---|---|
Carbohydrate | organic compounds composed of carbon, hydrogen, and oxygen in a ratio of about one carbon atom to two hydrogen atoms to one oxygen atom |
Monosaccharide | a monomer of a carbohydrate |
Disaccharide | when two monosaccharaides in living things combine in a condensation reaction to form double sugar |
Polysaccharide | a complex molecule composed of three or more monosaccharaides |
Protein | organic compounds composed mainly of carbon, hydrogen, oxygen, and nitrogen |
Amino Acid | when proteins are formed from the linkage of monomers called this |
Peptide Bond | when two amino acids form a covalent bond called this |
Polypeptide | very long chains that amino acids often form |
Enzyme | RNA or protein molecules that act as biological catalysts, which is essential for the functioning of any cell |
Substrate | the reactant being catalyzed |
Active Site | folds of an enzyme |
Lipid | large, nonpolar organic molecules |
Fatty Acid | un-branched carbon chains that make up most lipids |
Phospholipid | two, rather than three fatty acids attached to a molecule of glycerol |
Wax | a type of structural lipid consisting of a long fatty-acid chain joined to a long alcohol chain |
Steroid | molecules that are composed of four fused carbon rings with various functional groups attached to them |
Nucleic Acid | very large and complex organic molecules that store and transfer important information in the cell |
Deoxyribonucleic Acid (DNA) | contains information that determines the characteristics of an organism and directs its cell activities |
Ribonucleic Acid (RNA) | stores and transfers information from DNA that is essential for the manufacturing of proteins; can also act as enzymes |
Nucleotide | thousands of linked monomers that make up the polymers DNA and RNA; made of three main components: phosphate group, five-carbon sugar, and a ring-shaped nitrogenous base |