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Can you help me understand the movemement of tectonic plates and their margins

The Earth's surface is divide into plates, and these plates on the Crust move around slowly (mm's to cm's a year), this is due to convection currents in the mantle on which the crust sits. These convectio...

TC
Answered by Tom C. Geography tutor
6011 Views

Explain how proteins act as enzymes, including control by feedback inhibition in allosteric enzymes [9 marks]

The following answers this past exam question. Test your understanding by defining all the CAPITALISED words. Enzymes are GLOBULAR PROTEINS, which contain an active site to which the substrate binds. The ...

PS
Answered by Paulien S. Biology tutor
7086 Views

Why is oxygen needed in respiration?

In respiration, as you know the electrons travel through the electron transport chain and provide the energy to pump Hydrogen ions across the inner membrane. Once they reach the end of the chain, where do...

EJ
Answered by Emma J. Biology tutor
15046 Views

Lithium and potassium are both in Group 1 of the periodic table. Explain why.

Li and K both have one electron in their outer shell and therefore perform chemical reactions in a similar way and share certain characteristics.

JD
Answered by Joshua D. Chemistry tutor
2957 Views

Describe three differences between a motor neurone and a sensory neurone.

A motor neurone has no or a very short dendron whereas a sensory neurone has a long dendron. A sensory neurone's cell body is found 'in the middle' of the neurone whereas a motor neurone's cell body is fo...

JD
Answered by Joshua D. Biology tutor
6819 Views

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