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Enzymes are proteins that catalyse specific biological reactions in the body. These proteins have a specific 3D structure known as a teritary structure, with a specialised domain known as an 'active site' th...

A nerve impulse travelling down a motor neurone causes the release of acetylcholine from the synpatic knob into the synaptic cleft. This then diffuses across the synaptic cleft down its concentration gradien...

In order to understand a source and write the best possible answer, there are seven easy steps to take: 1. What does the source say? We need to briefly look at the source to understand what it is. For exampl...

The use of prepositions to say you are 'in' a country is actually quite simple in French. Your two options are 'en' (which is more common) and 'au'. 'Au' is used with masculine countries that begin with a co...

1.Mitosis: division of germline epithelium (into spermatogonia) 2. Cell growth 3. Meiosis (2 divisons): results in four haploid daughter cells 4. Cell differentiation: forming sperm cells Extension: Sertoli ...