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Find the coordinates where the curve y=x^2+6x+5 crosses the x-axis.

When any curve crosses the x-axis, the y-coordinate is 0 at that point. Hence, our answers will have y=0. So we want to solve x^2+6x+5=0. From before, we have that x^2+6x+5=0 can be rewritten as (x+5)(x+1)=0...
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Answered by Jonny I. • Maths tutor
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Factorise fully x^2+6x+5=0

To start, notice that we have x^2 in our equation. This means that our answer is of the form (x )(x ). We now look for integers that give 5 when multiplied together. The only way we can do this is with the n...
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Answered by Jonny I. • Maths tutor
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What is functional RNA?

Non-coding RNA.The sequence of Messenger RNA codes for a protein so is not functional RNA. However some RNA has catalytic function, such as ribosomal RNA, doesn't code for proteins so is functional RNA. Tran...
EC
Answered by Edward C. • Biology tutor
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Outline the first three levels of protein structure, including the types of bonding within each

The primary structure of a protein is its amino acid sequence which is determined by the base sequence of the gene which codes for the protein. Secondary structures include alpha-helicies and beta-pleated sh...
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Answered by Rowena G. • Biology tutor
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Explain how bacteria may become resistant to antibiotics

Bacterial resistance to antibiotics is an example of natural selection. In a population of bacteria there may be some individuals that are not affected by the antibiotic. This may be due to random changes or...
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Answered by Rowena G. • Biology tutor
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