To determine which option does not represent a function of proteins, let’s evaluate each choice:
- a) Provide structural components: Proteins play a critical role in forming structures such as muscles, tendons, and skin. This is indeed one of their primary functions.
- b) Catalyze reactions in the cells: Enzymes, which are proteins, facilitate biochemical reactions. Thus, this statement is also true.
- c) Transport substances through the bloodstream: Many proteins, such as hemoglobin, are responsible for the transport of oxygen and other substances throughout the body. This is a recognized function of proteins.
- d) Store the genetic information of a living organism: This option refers to the role of nucleic acids, specifically DNA and RNA, not proteins. Proteins do not store genetic information; they are translated from the information encoded in nucleic acids.
- e) Movement of muscles: Muscle contraction is facilitated by proteins such as actin and myosin, making this statement true as well.
In summary, the correct answer to the question is d) store the genetic information of a living organism, as this is a function attributed to nucleic acids rather than proteins.