Which of the following is an example of a biological macromolecule?
A.
Amino acid
B.
Protein
C.
Nucleic acid, Protein
D.
Monosaccharide
The correct answer and Explanation is :
The correct answer is C. Nucleic acid, Protein.
Biological macromolecules are large, complex molecules essential to various functions in living organisms. There are four main types of biological macromolecules: proteins, nucleic acids, carbohydrates, and lipids. Each type plays a crucial role in the structure and function of cells.
- Proteins: These are composed of long chains of amino acids linked by peptide bonds. Proteins are fundamental to many cellular processes. They serve as enzymes, structural components, signaling molecules, and transporters. For example, enzymes like amylase help in digesting food, while structural proteins like collagen provide support to tissues.
- Nucleic acids: These are polymers made up of nucleotide units, which consist of a sugar, a phosphate group, and a nitrogenous base. There are two main types of nucleic acids: DNA (deoxyribonucleic acid) and RNA (ribonucleic acid). DNA stores and transmits genetic information, serving as the blueprint for all living organisms. RNA is involved in protein synthesis and gene regulation.
In contrast, amino acids and monosaccharides are not macromolecules themselves but are the building blocks of macromolecules.
- Amino acids are the monomers that link together to form proteins.
- Monosaccharides are simple sugars and the basic units of carbohydrates. They join to form larger carbohydrates, like starch and cellulose.
Therefore, proteins and nucleic acids are examples of biological macromolecules due to their large size and complex structure, which are essential for life processes.