Answer the question on the basis of passage given below:
Living systems are made up of various complex biomolecules like carbohydrates, proteins, nucleic acids, lipids etc. Proteins and carbohydrates are essential constituents of our food. Carbohydrates are primarily produced by plants and form a very large group of naturally occurring organic compounds. Some common examples are cane sugar, glucose, starch etc.
Insulin, generally given to diabetic patient is a:
Answer & explanation
Correct answer: option 2
The correct answer is Option (2) → Protein
Insulin is a hormone made of two polypeptide chains containing 51 amino acids in all, so it is a protein (a globular protein, soluble in water). It is released in response to a rise in blood glucose and keeps the blood sugar level within narrow limits, which is why it is given to diabetic patients.
NCERT (2026-27 edition):
Globular Proteins – “This structure results when the chains of polypeptides coil around to give a spherical shape. These are usually soluble in water. Insulin and albumins are the common examples of globular proteins.”