Which of the following is NOT a biomolecule?
A. Water
B. Carbohydrate
C. Lipid
D. Nucleic Acid
A. Water
The correct answer is A. Water. Water is not considered a biomolecule. Biomolecules refer to the organic molecules found in living organisms, such as carbohydrates, lipids, nucleic acids, and proteins. Water, on the other hand, is an inorganic molecule and is not considered a biomolecule.
To determine which of the given options is NOT a biomolecule, let's first understand what biomolecules are.
Biomolecules are organic molecules that are essential for the structure and function of living organisms. They are typically classified into four main categories: carbohydrates, lipids, proteins, and nucleic acids.
Now, let's evaluate each option:
A. Water: Although water is essential for life and plays a crucial role in biological processes, it is not considered a biomolecule. Water is an inorganic molecule composed of two hydrogen atoms bonded to one oxygen atom (H2O).
B. Carbohydrate: Carbohydrates are biomolecules composed of carbon, hydrogen, and oxygen atoms. They serve as a major source of energy and are found in various forms, such as sugars and starches.
C. Lipid: Lipids are another class of biomolecules that include fats, oils, phospholipids, and steroids. They are characterized by their hydrophobic nature and are involved in energy storage, insulation, and cell membrane structure.
D. Nucleic Acid: Nucleic acids, such as DNA and RNA, are biomolecules composed of nucleotides. They play a fundamental role in genetic information storage and protein synthesis.
Considering the above information, we can conclude that option A (Water) is NOT a biomolecule.