Question

In cells, __________ are proteins that are needed to lower the amount of energy required to start chemical reactions. A) acids B) enzymes C) products D) substrates

Answer 1

$Enzymes.$
i.e., option B.

Answer 2

Hey friend here is your answer

b.enzymes

In cells, enzymes are proteins that are needed to lower the amount of energy required to start chemical reactions.

hope it help you ^_^