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Describe the structure of DNA in the eukaryotic cell

DNA is a double stranded helix. Each strand is held together by complementary base pairs or nucleotides. A nucleotide consists of a base, a deoxyribose sugar and a phosphate. The bases are A, T, C and G. G a...
ML
Answered by Megan L. • Biology tutor
13888 Views

How do I compile a successful portfolio?

At this early stage in a design based or creative education, people are not looking for specialisation - they are looking for the opposite. A successful portfolio will have variety, no two projects should be...
GK
Answered by Gregory K. • Art tutor
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How does pH relate to pKa?

pH measures the concentration of H + (protons) in an aqueous solution. pK a measures the ability for an acid to dissociate in an aquesous solution. Their relationship can be described my the Henderson-hassel...
CW
4006 Views

2 log(x + a) = log(16a^6) where a is a positive constant. How do I find x in terms of a?

The left hand side of the equation can be rewritten as log(x+a)^2, using the power rule for logs. We can then simplify log(x+a)^2=log(16a^6) to (x+a)^2=16a^6. Taking the square root of both sides, we find x+...
EV
Answered by Emily V. • Maths tutor
15702 Views

How do I solve quadratic equation by completing the square : X^2 - 4X = 5

We have X 2 - 4X = 5, write the expression on the left side as X 2 - 2•2X = 5. Then we would need extra term 4 to complete the square, so adding 4 on the both sides gives us, X 2 - 2•2X + 4 = 5 +4. Simplify ...
RK
Answered by Rabin K. • Maths tutor
4428 Views