I. Heat is not readily available to all living cells. II. Heat at excessive amounts denatures proteins. III. Heat does not provide the activation energy for their reactions. IV. When a critical temperature is reached, proteins no longer function.
Living cells cannot use heat to provide the activation energy for biochemical reactions because ________. Which choice(s) complete the sentence correctly? A) Answer choice II. B) Answer choices II and IV. C) Answer choice III and IV. D) All answers can complete the sentence.