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Explain how a substitution mutation could cause an enzyme not to work (5)

The mutation changes the order of bases so there is a different triplet code present. This results in a different amino acid being coded for in the polypeptide chain. Thi...

EC
Answered by Evie C. Biology tutor
6889 Views

"Transnational Corporations (TNCS) only bring disadvantages to their host country" To what extent do you agree? (9)

Intro- define key terms TNCs are large corporations that operate in more than one country. A host country is defined as a country that a TNC has chosen to establish part of its operations...

EC
Answered by Evie C. Geography tutor
23396 Views

Express 4x/(x^2-9) - 2/(x+3) as a single fraction in its simplest form.

To satisfy the condition of substracting two fractions with unlike denominators, a common denominator needs to be found. By recognizing x^2 - 9 = (x-3)(x+3), we can rewrite the question as 4x/(x-3)(x+3) -...

YC
Answered by Ye C. Maths tutor
5711 Views

Show that r^2(r + 1)^2 - r^2(r - 1)^2 ≡ 4r^3.

Start with the left hand side (LHS) of the equation. r^2(r + 1)^2 - r^2(r - 1)^2Take the equivalent terms from the separate parts of the LHS outside of set of brackets.r^2[(r + 1)^2 - (r - 1)^2]Expand t...

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Answered by Andrew D. Maths tutor
6619 Views

What structure is required for a perfect 16 marker?

A perfect 16 marker would be structured like this:

1. A small introductory paragraph
Perhaps including the definition of the key word put forward in the question a...

BR
132393 Views

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