(a)   is a type of enzyme that specifically speeds up chemical reactions.

(a)   is a complex sugar (polysaccharide) that is the main structural component of plant cell walls.

(a)   is deoxyribonucleic acid; substance that carries genetic information in most living things.

(a)   is a type of protein found in living things that changes the rate of chemical reactions.

(a)   is a polysaccharide deposited into bodily tissues as a store of carbohydrates.

(a)   is a simple sugar (monosaccharide) of chemical formula C6H12O6.

(a)   is a red-colored protein found in red blood cells that transports oxygen in the blood.

(a)   are chemical compounds that contain a carbon backbone.

(a)   is ribonucleic acid; substance present in all living things that directs the production of proteins.

(a)   is a polysaccharide that functions as a carbohydrate and is commonly found in plant tissue.

(a)   is an analogy that shows the specificity of enzymes and substrates.

(a)   is a large, complex, organic polymer essential to all life containing nitrogen and sometimes sulfur.

(a)   is a hormone produced by the pancreas that regulates blood sugar.

(a)   is a complex organic substance made up of nucleotides, such as DNA and RNA.

(a)   is a specific type of lipid composed of four carbon rings, such as testosterone or cholesterol.

(a)   is a large group of organic compounds including oils, waxes, and fats that are insoluble in water and are used for energy storage and insulation.

(a)   is a type of lipid that contains a phosphate group and is found in cell membranes.

(a)   is the smallest amount of energy required for a chemical reaction to occur.