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Describe the sodium-potassium ion pump on cell plasma membranes (2 marks)

These pumps use ATP / active transport to move 3 sodium ions (Na + ) out of the cell for every two potassium ions (K + ) that move in.1 mark - idea of active transport / use of ATP1 mark - idea of 3 Na + and...
AA
Answered by Aarif A. • Biology tutor
4142 Views

Solve the following simultaneous equations: 1) 2x + 7y = 12 2) 4x = 14 - 4y

×2 --> 4x + 14y = 241) - 2) --> 4x + 14y - 4x = 24 - 14 - (-4y) 14y = 10 + 4y10y = 10 --> y = 14x = 14 - 4 (1)x = 10/4 = 2.5x = 2.5 & y= 1
BS
Answered by Bernardo S. • Maths tutor
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Decrivez l’immigration en France apres avoir regardé le film ‘Que est- ce qu'on a fait au Bon Dieu?'

Depuis plusieurs années, le sujet d’Immigration en France est devenu très populaire parmi toutes les classes et races. Si autre fois les immigrés étaient majoritairement européens, ce n’est plus le cas aujou...
AK
Answered by Aleksandra K. • French tutor
2681 Views

Find max point of y=-x^2-5x-10

Can either differentiate or using the completing the square method. Differentiation not covered at GCSE so completing the square should be done to get -((x+5/2) 2 +15/4). To find the max point we need to fin...
GR
Answered by Gautham R. • Maths tutor
4056 Views

How should you answer reading comprehension questions involving grammar usage?

With grammar questions, examiners are looking for a straightforward answer about how a particular point of grammar works within a sentence. While it is good to use specific language such 'nominative', 'main ...
CM
Answered by Christina M. • Latin tutor
2846 Views