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The main bonding in DNA which renders the double helix structure so stable is that of hydrogen bonds. Between the complementary base pairs, hydrogen bonds connect the two strands of the helix. There are 3 H ...

There are a number of integrals that we can evaluate directly, called elementary functions:integral[ x dx ] = x 2 /2 + Cintegral[cos( x ) dx ] = sin( x ) + C However, most integrals cannot be solved so direc...

This is something that can make the difference between a C and an A at A Level for languages. Speaking from my experience of Spanish A Level, there are a couple of things that you can do to up your writing g...

Proof by induction has three core elements to it. To start with you must prove that the statement is true for the 'basic case'. For the most part this is 1, but some questions state it is higher. Do this by ...

First, I was born and lived in the capital of China, I am a native speaker of mandarin and my english is advanced too, so there may not have communicative problems. Second, according to different students, d...