Which of the following statements about the electron transport chain is true? a. the proton gradient established during electron transport is a form of potential energy. b. protons are pumped out of the mitochondria by the complexes of the electron transport chain. c. the electron transport chain can be found in the mitochondria of aerobic bacteria and other cells. d. atp synthesis associated with the electron transport chain is an example of substrate level phosphorylation. e. the movement of protons down a concentration gradient is an endergonic process.

The scientific method is a series of steps followed by scientific investigators to answer specific questions about the natural world. it involves making observations, formulating a hypothesis, and conducting scientific experiments.the steps of the scientific method are •observation-the first step of the scientific method involves making an observation about something that interests you•question-once you've made your observation, you must formulate a question about what you have observed. •hypothesis-once you've made your observation, you must formulate a question about what you have observed. •experiment-once you've developed a hypothesis, you must design and conduct an experiment that will test it.•results-the results are where you report what happened in the experiment. •conclusion-the final step of the scientific method is developing a conclusion.i hope that this you : )