NEET BIOLOGY

Detailed explanation-1: -Humans are unable to digest cellulose because we lack appropriate enzymes (cellulase) to break down this complex substance, cellulose.

Detailed explanation-2: -Humans cannot digest cellulose because they lack the enzymes essential for breaking the beta-acetyl linkages. The undigested cellulose acts as fibre that aids in the functioning of the intestinal tract.

Detailed explanation-3: -So, the correct answer is ‘cellulose’.

Detailed explanation-4: -In the human body, cellulose cannot be digested due to a lack of appropriate enzymes to break the beta acetal linkages. The human body does not have the digestive mechanism to break the monosaccharide bonds of cellulose.

Detailed explanation-5: -These symbiotic bacteria possess the necessary enzymes to digest cellulose in the GI tract. They have the required enzymes for the breakdown or hydrolysis of the cellulose; the animals do not, not even termites, have the correct enzymes. No vertebrate can digest cellulose directly.