Which 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.

Option 2, 4 and 5.

Explanation:

ATP ( adenosine triphosphate ) may be defined as the energy currency of the cell. The ATP molecule is used for the transportation of molecules in the active transport.

The ATP molecule links the anabolic and catabolic pathways and acts as common intermediate. The ATP molecule is generated in both the aerobic as well as anaerobic respiration. The flow of protons during electron transport chain helps in the formation of ATP molecule.

Thus, the correct answer is option (2), (4) and (5).  

geologic time scale (for gradpoint) =)