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How does DNA replication occur in eukaryotes?

DNA replication involves a ‘complex system of enzymes'. DNA replication is semiconservative (1 stand of the original 2 stranded piece of DNA is conserved) It is a complex process involving many enzymes and w...
Answered by • Biology tutor
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Without expanding any brackets, work out the solutions of 9(x+3)^2 = 4

To solve for x first divide both sides by 9, giving the equation:(x+3) 2 = 4/9Then square root both sides, leading to:x+3 = +/- 2/3Finally subtract 3 from both sides leaving:x = -11/3 or x = -7/3
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Answered by Modestas T. • Maths tutor
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Explain why the use of petrol and diesel cars may be a source of market failure.

Pollution from petrol cars is an example of a negative externality (where the actions of one person impact another without the affected person being compensated). In a competitive economy people pay the &quo...
Answered by • Economics tutor
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Solve the simultaneous equations: 3x + y =11; 2x + y = 8

subtract one from the other to eliminate y: 3x+y=11; 2x+y=8 --> x=3 substitute value of x back in and solve for y : 3(3)+y=11; 9+y=11; --> y=2
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Answered by Israel H. • Maths tutor
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(a) Expand and simplify (x − 3)(x + 5), ..2 marks.. (b) Solve x^2 + 8x − 9 = 0 ..3 marks..

(a) Remember: Multiply each term in the left bracket by every term in the right bracket.(x-3)(x+5) = x 2 + 5x - 3x -15.Collecting all of the like terms:= x 2 + 2x -15. (b) Solve x 2 + 8x − 9 = 0Remember to p...
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Answered by Jack W. • Maths tutor
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