Which of the following statements are true?
1. electron carriers are located at ribosomes
2. atp is a common intermediate between catabolic and anabolic pathways
3. atp is used for the long-term storage of energy and so is often found in storage granules
4. anaerobic organisms are capable of generating atp via respiration
5. atp can be generated by the flow of protons across protein channels

a. 1, 3, 4
b. 1, 2, 3
c. 2, 3, 5
d. 2, 4, 5
e. all of the statements are true