Question

multiple select question
select all that apply
which of the following are examples of proteins?
antibodies
energy storage molecules
enzymes
structural molecules

Explanation:

• Antibodies: These are proteins that help the immune system identify and neutralize foreign substances like bacteria and viruses.
• Enzymes: Most enzymes are proteins (some are RNA) that act as biological catalysts to speed up chemical reactions in cells.
• Structural molecules: Proteins can serve as structural components, e.g., collagen in connective tissues, actin and myosin in muscle.
• Energy storage molecules: Energy storage is mainly done by carbohydrates (e.g., glycogen) and lipids (e.g., fats), not proteins (though proteins can be used for energy in emergencies, they aren't primary energy - storage molecules).

Answer:

A. Antibodies
C. Enzymes
D. Structural molecules