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From the chemical listed below, select the correct sequences that are found in these categories: carbohydrate, lipid, protein, nucleic acid.

a. disaccharide, phospholipid, glycerol, DNA

b. glucose, cholesterol, enzyme, lemon juice

c. starch, triglyceride, enzyme, RNA

d. sucrose, steroids, enzyme, hydroxyl group

Group of answer choices

c

b

d

a

1 answer

To categorize the given sequences:

a. disaccharide (carbohydrate), phospholipid (lipid), glycerol (lipid), DNA (nucleic acid)

b. glucose (carbohydrate), cholesterol (lipid), enzyme (protein), lemon juice (not a macromolecule)

c. starch (carbohydrate), triglyceride (lipid), enzyme (protein), RNA (nucleic acid)

d. sucrose (carbohydrate), steroids (lipid), enzyme (protein), hydroxyl group (not a macromolecule)

Now let's analyze the choices based on the presence of correct categories:

  • a contains valid examples but has glycerol as a standalone molecule instead of being explicitly part of a lipid.
  • b contains glucose (carbohydrate), cholesterol (lipid), and enzyme (protein), but lemon juice is not classified as a macromolecule.
  • c contains valid examples of carbohydrate (starch), lipid (triglyceride), protein (enzyme), and nucleic acid (RNA).
  • d contains valid examples of carbohydrate (sucrose), lipid (steroids), protein (enzyme), but the hydroxyl group is a functional group, not a macromolecule.

Thus, the correct sequence that presents all categories accurately is:

c: starch (carbohydrate), triglyceride (lipid), enzyme (protein), RNA (nucleic acid).