Which of the following are true statements about enzymes? ( there are more than one answer) A. They are necessary for a chemical reaction to occur

B. They increase the efficiency of chemical reactions.

C. They reduce the energy needed for a chemical reaction to occur.

D. One enzyme catalyzes many different reactions.

E. They are only needed for a few chemical reactions in cells.

F. They can catalyze the same reaction repeatedly.

They are necessary for a chemical reaction to occur

They increase the efficiency of chemical reactions

evidence and logical support is essential for a scientist to do in order to maintain credibility. this is because no one can believe without any logic and without any evidence.hence a scientist can maintain credibility by proving himself and by answering logically so experiments prove very beneficial. logical hypothesis give conclusion which is acceptable. therefore, there are two main factors to maintain credibility by a scientist is evidence and logical support.