Problem:
Question 1: Which electron carrier(s) function(s) in the Krebs cycle?
a. NAD+ only
b. both NAD+ and FAD
c. ATP only
d. FAD only
e. NAD+, FAD, and cAMP
Question 2: Transcription begins at regions of DNA that have a binding site for RNA polymerase. These regions of DNA are known as ________.
a. promoters
b. introns
c. sigma
d. exons
e. telomeres
Please select correct answer and also provide explaination.