★ Macromolecules & Enzymes Quiz
How do enzymes speed up chemical reactions?
A. provide energy for the reaction
B. absorb energy
C. lower the activation energy
D. increase the number of available reactant molecules
Select your answer:
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Cell Division › View Which process and type of resulting cells are represented?
A. mitosis, gametes
B. mitosis, body cells
C. meiosis, gametes
D. meiosis, body cells
Excretion › View
Which of the following by-products of metabolism is most toxic?
A. Urea
B. Uric acid
C. Ammonia
D. Carbonic acid