Atp synthases are found in the prokaryotic plasma membrane and in mitochondria and chloroplasts.

(a) propose a hypothesis to account for an evolutionary relationship of these eukaryotic organelles and prokaryotes.

(b) explain how the amino acid sequences of the atp synthases from the different sources could be used to support or refute your hypothesis.

a) ATP synthase is a molecular machine. This enzyme (protein) is in charge of

making ATP and is used by prokaryotes and eukaryotes. The fact that the same enzyme appears in both groups creates a relationship because the easiest way this could happen is by eukaryotes acquiring this mechanisms from prokaryotes. It is believed that in fact this happened through a process known as endosymbiosis, in which prokaryotic cells engulf other cells establishing a symbiotic relationship. After millions of years it eventually became 1 organism.

b) Since ATP synthase is a type of protein one could expect that the amino acid sequence that creates this enzyme should be similar between prokaryotes and eukaryotes and supporting the idea that eukaryotes evolved from prokaryotes.

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the transfer of energy between two molecules spaced just nanometers apart plays a key role in many technologies, including photovoltaics, quantum information systems, lighting, and sensors, as well as in biophysics to measure nanometer distances and in photosynthesis. but an open question in this area is what effect, if any, the surrounding photonic environment has on this nanoscale energy transfer. by designing and performing a carefully controlled experiment to answer this question, scientists have settled the debate and found clues to improving the efficiency of many of the technologies that rely on this process.

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