Chemical digestion couldn't take place without the help of what?

Correct Answer: digestive enzymes
pigments
melatonin
neurotransmitters

Explanation: Chemical digestion could not take place without the help of digestive enzymes. An enzyme is a protein that speeds up chemical reactions in the body. Digestive enzymes speed up chemical reactions that break down large food molecules into small molecules.

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Chemical digestion couldn’t take place without the help of what?