Question

using the answer choices below (a through d), match the characteristic with its macromolecule class.
form the major framework of biological membranes
used to create steroid molecules like cholesterol
act as short - term energetic molecules
function energy storage and structural support
store and transmit genetic information
participate in nearly every chemical reaction in living systems
speed chemical reactions
exhibit various levels of structure

Explanation:

1. Lipids form the major framework of biological membranes. Phospholipids, a type of lipid, have a hydrophilic head and hydrophobic tails which arrange themselves to create a bilayer in membranes.
2. Lipids are used to create steroid molecules like cholesterol. Steroids are a class of lipids with a characteristic four - ring structure.
3. Carbohydrates act as short - term energetic molecules. Glucose, a simple carbohydrate, is readily broken down in cells to release energy.
4. Carbohydrates function in energy storage (e.g., starch in plants, glycogen in animals) and structural support (e.g., cellulose in plant cell walls).
5. Nucleic acids store and transmit genetic information. DNA and RNA carry the genetic code that determines the characteristics and functions of living organisms.
6. Proteins participate in nearly every chemical reaction in living systems. Enzymes, which are proteins, catalyze chemical reactions.
7. Proteins speed up chemical reactions as enzymes. Enzymes lower the activation energy required for a reaction to occur.
8. Proteins exhibit various levels of structure: primary (amino - acid sequence), secondary (alpha - helices and beta - sheets), tertiary (3 - D structure), and quaternary (multiple polypeptide chains).

Answer:

1. Lipids
2. Lipids
3. Carbohydrates
4. Carbohydrates
5. Nucleic acids
6. Proteins
7. Proteins
8. Proteins