Describe the structure of haemoglobin and explain how its 3 dimensional structure is achieved to enable it to carry oxygen molecules.

The fact that haemoglobin have a 'dip-like' sort of thing in the centre, allows them to carry more oxygen because of its increased surface area.

Also, haemoglobin are small and flexible meaning that they can squeeze through the smallest capillaries and deliver oxygen.

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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