Proteins: Polymers & Essential Amino Acids — NEET Biology
🔥 Predicted for NEET 2027Each protein is a polymer of amino acids. As there are 20 types of amino acids (e.g. alanine, cysteine, proline, tryptophan, lysine, etc.), a protein is a heteropolymer and not a homopolymer. A homopolymer has only one type of monomer repeating 'n' number of times. This information about the amino acid content is important as later in your nutrition lessons, you will learn that certain amino acids are essential for our health and they have to be supplied through our diet. Hence, dietary proteins are the source of essential amino acids. Therefore, amino acids can be essential or non-essential. The latter are those which our body can make, while we get essential amino acids through our diet/food. Proteins carry out many functions in living organisms, some transport nutrients across cell membrane, some fight infectious organisms, some are hormones, some are enzymes,
Adjacent to a frequently-asked paragraph in the same chapter.
A nutrient label touts “essential amino acids” in a diet; a physiologist notes dietary protein’s role; another scientist classifies the same protein as a transport/hormone/enzyme. Which concept is correct?
View solution & NCERT explanation
Correct answer: C — Essential amino acids needed in diet; proteins perform diverse roles
Essential amino acids must be obtained from diet. Proteins serve multiple roles — enzymatic, hormonal, structural, and transport.
What does NCERT say about Each protein polymer amino?
Has this concept appeared in NEET?
Which chapter is this from?
Through deep analysis of NEET and NTA, 176 of the 180 ReNEET 2026 (June 21) questions were already in the MedicNEET question bank before the exam.
176/180MedicNEET's Biology question bank is built from the same NCERT lines NTA picks repeatedly. Not random MCQs — questions crafted exactly like NTA crafts them.