Question

of the following list, choose the functions of proteins in living cells. they are the immediate source of energy for most cell activities. they catalyze chemical reactions. they help the body recognize and destroy foreign microbes and cancer cells. they carry genetic information from one generation to the next. they transport oxygen in the blood of vertebrates. they play a key role in moving materials within cells.

Explanation:

• ATP is the immediate energy source for cells, not proteins.
• Enzymes (a type of protein) catalyze chemical reactions.
• Antibodies and immune-related proteins help recognize and destroy foreign microbes/cancer cells.
• Nucleic acids (DNA/RNA) carry genetic information, not proteins.
• Hemoglobin (a protein) transports oxygen in vertebrate blood.
• Motor proteins (e.g., kinesin) move materials within cells.

Answer:

• They catalyze chemical reactions.
• They help the body recognize and destroy foreign microbes and cancer cells.
• They transport oxygen in the blood of vertebrates.
• They play a key role in moving materials within cells.