NEET Biology: Biomolecules Practice Questions
15 free multiple-choice questions on Biomolecules for NEET Biology, each with the correct answer and a step-by-step explanation. Attempt a question, then reveal the solution to check your reasoning.
Practice thousands more Biomolecules questions in the app →Q1. Which class of biomolecules is characterized by the presence of a phosphate group and a sugar moiety?
Show answer & explanation
Correct answer: C — Nucleic Acids
Nucleic acids (DNA and RNA) are composed of phosphate groups and sugar (ribose or deoxyribose) units, forming the backbone of the molecule.
Q2. The main building blocks (monomers) of proteins are:
Show answer & explanation
Correct answer: C — Amino acids
Proteins are polymers formed by the polymerization of amino acids. Amino acids are the fundamental monomers of proteins.
Q3. The monomers that form carbohydrates are typically:
Show answer & explanation
Correct answer: A — Simple sugars (Monosaccharides)
Carbohydrates are polymers built from monosaccharide units, such as glucose, which are the simplest forms.
Q4. Amino acids are the monomer units that link together to form which type of biomolecule?
Show answer & explanation
Correct answer: C — Proteins
Amino acids are the fundamental building blocks (monomers) that polymerize to form proteins.
Q5. What is the primary role of proteins in the body?
Show answer & explanation
Correct answer: C — Catalysis and regulation of body processes
Proteins perform most of the functions in the body, including acting as enzymes (catalysts) and regulating various metabolic processes.
Q6. Which biomolecule plays a crucial role in maintaining the structural integrity and flexibility of cell membranes?
Show answer & explanation
Correct answer: D — Lipids
Lipids, particularly phospholipids, form the basic structure of the cell membrane, defining its barrier properties.
Q7. The primary role of biomolecules in living organisms is to provide energy, structural support, and information. This role is fulfilled by which combination of molecules?
Show answer & explanation
Correct answer: D — All four classes (Carbohydrates, Lipids, Proteins, Nucleic acids)
All major biomolecules are essential for life; carbohydrates provide energy, lipids provide energy storage, proteins provide structure and function, and nucleic acids store genetic information.
Q8. Proteins are polymers formed by the linkage of which monomers?
Show answer & explanation
Correct answer: C — Amino acids
Proteins are polymers constructed by linking individual amino acids together.
Q9. Which of the following biomolecules primarily functions as the main source of stored energy in living organisms?
Show answer & explanation
Correct answer: D — Lipids
Lipids (fats and oils) are highly efficient energy storage molecules in the body, storing energy in reduced forms.
Q10. Which type of biomolecule is essential for the synthesis of genetic information and heredity?
Show answer & explanation
Correct answer: A — Nucleic Acids
Nucleic acids (DNA and RNA) carry the genetic code and are fundamental to the inheritance of traits.
Q11. Which functional group is commonly found in the structure of proteins and is essential for forming peptide bonds during polymerization?
Show answer & explanation
Correct answer: B — Amino group (-NH2)
The amino group (-NH2) and carboxyl group (-COOH) of amino acids react to form the peptide bonds that link amino acids together to form proteins.
Q12. Water is often referred to as the universal solvent because it plays an important role in which aspect of biomolecules?
Show answer & explanation
Correct answer: D — Increasing the solubility of all biomolecules
Water's polarity allows it to dissolve many substances, making it the universal solvent essential for biochemical reactions.
Q13. Which biomolecule primarily functions as the genetic material for the cell?
Show answer & explanation
Correct answer: B — Nucleic Acids
Nucleic acids (DNA and RNA) store and transmit the genetic information of an organism.
Q14. Which of the following biomolecules is primarily responsible for storing energy in living organisms in the form of chemical bonds?
Show answer & explanation
Correct answer: D — Lipids
Lipids (fats and oils) are the primary storage molecules for energy in cells, characterized by their high energy density.
Q15. Which type of biomolecule primarily serves as the long-term energy storage molecule in living systems?
Show answer & explanation
Correct answer: B — Carbohydrates
Lipids (fats and oils) are the most efficient form of long-term energy storage for organisms.
Keep going — practice on Padhai Karlo
Padhai Karlo gives you unlimited NEET practice: chapter-wise questions, timed quizzes, and full mock tests with an All-India Rank — free to start.
Get the free Android app →