Question

1. error detection

each statement below contains one scientific error.
identify the error and rewrite the statement correctly.
a) lipids are polymers made of repeating fatty acid monomers.
b) all proteins function as enzymes in the cell.
c) nucleic acids provide energy for cellular processes.
d) carbohydrates store genetic information.

Explanation:

Part a)

• Error: Lipids are not polymers. Polymers are large molecules made of repeating monomer units, but lipids do not have a repeating monomer structure in the same way as true polymers (like proteins, nucleic acids, or carbohydrates). Also, not all lipids are made just of fatty acid monomers (e.g., phospholipids have a phosphate group too, and steroids have a different structure).
• Correction: Lipids are a diverse group of non - polymeric molecules (or Lipids are not polymers; they are a group of hydrophobic molecules that include structures like triglycerides (made of glycerol and fatty acids), phospholipids, and steroids). A more accurate rewrite: "Lipids are not polymers. Triglycerides (a type of lipid) are made of glycerol and fatty acid units, and lipids as a group are hydrophobic molecules with diverse structures."

• Error: Not all proteins function as enzymes. Proteins have many different functions such as structural support (e.g., collagen), transport (e.g., hemoglobin), defense (e.g., antibodies), and regulation (e.g., hormones like insulin).
• Correction: "Some proteins function as enzymes in the cell."

• Error: Nucleic acids (DNA and RNA) are responsible for storing and transmitting genetic information, not for providing energy for cellular processes. Molecules like glucose (a carbohydrate) and ATP are the main energy - providing molecules.
• Correction: "Nucleic acids store and transmit genetic information."

Answer:

Error: Lipids are stated as polymers (and the monomer description is incorrect).
Corrected statement: Lipids are not polymers. Triglycerides (a type of lipid) consist of glycerol and fatty acid units, and lipids are a diverse group of hydrophobic molecules.

Part b)