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Calvin carried out ‘feeding experiments’ where radioactive labelled carbon was fed to plants. ¹⁴CO₂ is taken up the cells and is then fixed into photosynthesis. ¹⁴CO_2...

DNA is a double stranded helix. Each strand is held together by complementary base pairs or nucleotides. A nucleotide consists of a base, a deoxyribose sugar and a phosphate. The bases are A, T, C and G. ...

Transmission is the way in which a disease is spread. Transmission of disease can occur in multiple ways. Two methods of this are:1)- vector transmission 2)- waterAn example of vector transmission is tube...

Muscle fibers are comprised of elongated myofibrils. A myofibril is made of repeating chains of sarcomeres which have no nucleus but have myosin and actin filaments which are able to slide past each other...

Body temperature must be maintained around 37°C as the enzymes in our body work best at this temperature. The thermoregulatory centre in the brain contains receptors that detect the temperature of blood, ...