I may be wrong but I think it’s the second one. They speed up reactions, and there’s a certain enzyme for a certain reaction.
Answer: C. is your answer
They are used to directly amplify segments of dna
Bias is when a scientist is inclined to put their own thoughts before their actual results. Therefore, an ethical scientist would not exhibit this trait.
Logic is when a scientist puts critical thinking and the scientific process first. An ethical scientist WOULD exhibit this trait.
Honesty is when a scientist tells the truth, wether or not their results align with their own thoughts/opinions. An ethical scientist WOULD exhibit this trait.
The answer to your question would be "An ethical scientist exhibits Logic and Honesty"