Macromolecule and Enzyme Test Study Guide KEY Name the 4


Macromolecule and Enzyme Test Study Guide KEY


Name the 4 macromolecules and the functions and examples of each.

Carbohydrates- quick/short term energy

Protein- Building blocks of living materials; compose structural parts such as keratin in hair and nails, antibodies, cartilage, bones, ligaments and enzymes

Lipids-Long term energy storage, Insulate against heat loss, Protective cushion around organs

Nucleic acids- Important for growth & reproduction of cells, contains the genetic code


Label and illustrate the 4 macromolecules.

Lipid Carbohydrate Protein Nucleic Acid


Name the 4 polymers with their monomer.

Polymer: Carbohydrate, Lipid, Protein, Nucleic Acid

Monomer: Monosaccharide, Glycerol/fatty acid, Amino Acid, Nucleotide


Give the name of the macromolecule tested and what indicates a positive test with the following:

Lugol’s Iodine - Carbohydrate-Starch; blue/black color

Benedict’s Solution - Carbohydrate- glucose (sugar); green/orange/red color

Biuret’s - Protein; purple/lavender

Sudan IV - Lipids; pink ring at top


Use the following terms to draw and label an enzymatic reaction: enzyme, active site, substrate, reactants, products, enzyme-substrate complex.


What is a catalyst? How do enzymes act like catalysts to affect chemical reactions?

Catalyst is any substance that speeds up a reaction

Increases the speed at which a reaction happens, decreases the activation energy required for a reaction


What does the term “Lock and key” explain?

Enzyme specificity: There is only one enzyme that works with one substrate to produce products

The enzyme can be used over and over again to produce the same products-it is not used up


Explain the term Denaturation. What things could affect the way in which an enzyme works?

Enzymes quit working because conditions have changed: the active sites change shapes and the substrates can no longer fit into them


Name two enzymes that we have discussed and how they help the body function.

Mouth- Salivary Amylase-breaks down starch

Stomach- Pepsin- breaks down proteins

Intestines- Amylase-breaks down starch

Trypsin- breaks down protein

Lipase- breaks down lipids/fat

Maltase/Sucrase/Lactase- breaks down sugars

Peptidase- breaks down proteins to amino acids


Name and explain the two types of enzymatic reactions. Draw a representation of each.

Catabolic- breaks bigger molecules into smaller ones

Anabolic- builds smaller molecules into larger ones

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