ANSWER:
MACROMOLECULES:
“The molecules consisting of thousands of atoms are called macromolecules. Their molecular masses range from thousands to millions.”
Examples: Haemoglobin is a macromolecule found in blood. It carries oxygen from our lungs to all body parts. Each molecule of haemoglobin consists of nearly 10,000 atoms, and is 68,000 times heavier than a hydrogen atom.
(Ref. An Insight Into Objective Chemsitry-11, Ch-01, Q. No. 08)