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Changing one DNA base will alter one triplet in the DNA code. As each triplet codes for an amino acid this may result in a change to the primary structure of the protein produced. If the changed amino aci...

First solve for the exact point on the line by substituting 5 into the original equation. You should get y=+-4. 
Now implicitly differentiate the equation: 4x-6y(dy/dx)=0. Rearranging this will yiel...

When answering a source based question, you need to focus on the 5W's. By answering each of them, you will address each of the problems of a source based question. 

5Ws: WHO / WHAT...

We know in a quadratic x^2 +bx + c = 0, -b/a = α + β and c/a = αβ. 

Therefore, α + β = -(-2k) = 2k, and αβ = k - 1. (Both are divided by the coefficient in front of x which is 1 so can be ignored.<...

The Subjunctive is one of the hardest ideas in Spanish, simply because it is not commonly used in English!  The easiest way I find to remember it is to think of WEIRDO!

Wishes- eg when using de...