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How does the electron transport chain work?

The electron transport chain is a collection of proteins ( complexes ), of which there are 4 types, whose purpose is to pump protons into the intermembrane space. These protons will be used by the ATP syntha...
CB
Answered by Cezar B. • Biology tutor
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Solve the following simultaneous equations: 2y+x=8 , 1+y=2x

This is a very common type of question that might be asked in an exam and there are 3 methods we could use to solve this; by substitution, by elimination (or subtraction) or by using straight line graphs. Th...
BR
Answered by Ben R. • Maths tutor
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Expand and simplify 2y+3y(5y+3)

BIDMAS Following BIDMAS, multiply the bracket out before the addition of the 2y. 3y(5y+3) = 15y 2 +9y adding the 2y gives the calculation of 15y 2 + 9y +2y = 15y 2 + 11y
ES
Answered by Emma S. • Maths tutor
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Explain the mechanism of meiosis.

Meiosis is a specific type of cell division. Unlike mitosis, which results in 2 identical copies of the mother cell, meiosis creates 4 daughter cells each containing half of a normal gentic material (we refe...
MG
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Calculate the PH of 32 mmol of HCl in 75cm^3 solution. Assume HCl fully dissociates.

32 mmol = 0.032 mol 75cm 3 = 0.075dm 3 n = c x v so c = n / v c = 0.032mol/0.075 dm 3 = 0.426moldm -3 pH = -log[H+] pH = -log(0.426) = 0.37 (no units)
AP
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