Answer:
Enzymes are proteins that act as biological catalysts. Catalysts accelerate chemical reactions. The molecules upon which enzymes may act are called substrates, and the enzyme converts the substrates into different molecules known as products.
Explanation:
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Probaly c or d would be the most likely answer.
Answer:
1 preposition ok or 5 preposition
Yes, he should include at the end of the essay information about what he learned and if it changed him.
Absolutely so.
