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.