Question

question ①
________ is indigestible by animals because they lack ______, which is a ________.
answer
starch; an enzyme to break it down; protein
a triglyceride; an enzyme to break it down; protein
cellulose; a certain gene; protein
cellulose; an enzyme to break it down; protein
i dont know yet
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Explanation:

Cellulose is a polysaccharide that animals generally cannot digest because they lack the specific enzyme (cellulase) to break it down. Enzymes are proteins that catalyze chemical reactions.

Answer:

D. Cellulose; an enzyme to break it down; protein