In this task, you are given a question and an answer, you would be asked to create the sentence based on the Question-Answer provided. It should be contained within the Question-Answer provided.

Q: Question: Which proteins recognize and combine with harmful materials, including both toxic chemicals and invasive microorganisms? Answer: antibodies

A: Antibodies recognize and combine with harmful materials, including both toxic chemicals and invasive microorganisms.
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Q: Question: Metabolic enzymes catalyze catabolic reactions that break down what? Answer: carbohydrates

A: Metabolic enzymes catalyze catabolic reactions that break down carbohydrates.
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Q: Question: What type of role does cartilage play in the human skeleton? Answer: insignificant

A:
Insignificant type of role does cartilage play in the human skeleton.
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