Questions: Multiple Choice Question Name the family of macromolecules that plays a role in cell structure, communication (hormones and neurotransmitters), membrane transport, catalysis (enzymes), recognition and protection (immune factors), movement (contractile molecules), and cell adhesion. Carbohydrates Lipids Proteins Nucleic acids

The answer is the third one (Proteins): the family of macromolecules that plays a role in cell structure, communication (hormones and neurotransmitters), membrane transport, catalysis (enzymes), recognition and protection (immune factors), movement (contractile molecules), and cell adhesion.

Explanation for each option:

1. Carbohydrates: While carbohydrates are important for energy storage and supply, as well as cell recognition and signaling, they do not play as broad a role in the functions listed in the question.

2. Lipids: Lipids are crucial for forming cell membranes, energy storage, and signaling molecules (like hormones), but they do not cover all the roles mentioned, such as catalysis and cell adhesion.

3. Proteins: Proteins are versatile macromolecules that are involved in nearly all aspects of cell function. They serve as enzymes (catalysis), structural components, signaling molecules (hormones and neurotransmitters), transporters, immune factors, contractile elements, and adhesion molecules.

4. Nucleic acids: Nucleic acids (DNA and RNA) are primarily involved in the storage and expression of genetic information. They do not directly participate in the wide range of functions listed in the question.

Summary: Proteins are the family of macromolecules that play a role in cell structure, communication, membrane transport, catalysis, recognition and protection, movement, and cell adhesion.