Biology - Digestion and Absorption Question with Solution | TestHub
BiologyDigestion and AbsorptionAlimentary CanalEasy2 minPYQ_2026
BiologyEasysingle choice
The hardest substance of human body is _________
Options:
Answer:
A
Solution:
Enamel is the hardest substance in the human body. It is the highly mineralized outer layer of the tooth, primarily composed of crystalline calcium phosphate (hydroxyapatite).
Dentin is the layer beneath the enamel, which is less hard.
Cementum is a calcified substance covering the root of a tooth.
Histone is a protein that provides structural support to a chromosome.
Answer: enamel
Stream:MHT_CET_MEDICALSubject:BiologyTopic:Digestion and AbsorptionSubtopic:Alimentary Canal
⏱ 2mℹ️ Source: PYQ_2026
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