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How are different substances transported across the cell membrane?

There are several different ways substances can be transported: 1) simple diffusion, i.e. substances that tend to be lipid soluble/ non-polar and can pass easily across the phospholipid bilyar of cells. 2) f...
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Answered by Vinay S. • Biology tutor
10865 Views

There are n sweets in a bag, 6 of which are red. The rest of the sweets are blue. Jen removes 1 sweet from the bag. Jen then takes another sweet from the bag. The probability that Hannah takes two red sweets is 1/3. Show that n²-n-90=0.

We know the total number of sweets is n, and that 6 are red. When Jen takes the first sweet, the probability of it being red is [number of red sweets] / [how many there are] = 6/n . For the second sweet, the...
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Answered by Amy B. • Maths tutor
5566 Views

How do I analyse Shakespeare’s language?

When analysing Shakespeare, don’t panic if you don’t understand every word; focus instead on the overall meaning of the text. Ask yourself: What is Shakespeare trying to achieve here? Has he written this pas...
KC
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What does it mean to 'earth' something?

When you earth a charged object you're creating a physical path between this object and the ground so it loses its charge. To begin with the object is charged due to having extra or fewer free electrons. Whe...
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Answered by Rhiannon J. • Physics tutor
19382 Views

Lewis wins £360 in a prize draw. He gives 15% to charity and puts 3/8 into his savings. The rest he uses to buy a bike. How much of the money has Lewis got left for this bike? Note: do not use a calculator

10% of £360 is £36. Therefore 5% of £360 would be £18 (half of the 10% figure). Added together, 15% of £360 would be £54. 1/8 of £360 is £45 (half £360 three times), therefore 3/8 would be £135 (£45*3). £54 ...
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Answered by Lewis B. • Maths tutor
3721 Views