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Explanation of the lac operon, based on 9700/41/M/J/18 Question 3

It is made up of 3 genes: lacZ, lacY and lacA which encode for B-galactosidase (LacZ), lactose permease (LacY), and another enzyme (not studied at A level) respectively.The functions of LacZ (the enzyme) ...

JV
Answered by Jose V. Biology tutor
3648 Views

Describe and evaluate research into obedience.

Obedience is following the orders of an authority figure and has been the subject of much research. Milgram (1963) wanted to look at how so many people were capable of doing horrible things to other peopl...

PG
Answered by Phoebe G. Psychology tutor
13591 Views

There are five main areas a duty of care may arise regarding omissions. Discuss any three areas.

Occasionally an omission can amount to an actus reus of a crime. An omission is a failure to act where there is a duty to act. In the UK the general rule regarding omissions is that there is no good Samar...

MA
Answered by Marcello A. Law tutor
4765 Views

Solve the Inequality X^2 - 2X - 8 < 0

First we need to solve the Inequality, looking at what two numbers add to give -2 and multiply to give -8 we find these to be -4 and +2. So we can now say that (X-4)(X+2)<0. Then I like to draw a ...

LC
Answered by Liam C. Maths tutor
6091 Views

Solve the following pair of simultaneous equations: 2x - y = 7 and 4x + y = 23

2x - y = 74x + y = 23In this pair of simultaneous equations, we have two unknowns. We can solve them simultaneously using substitution or elimination, but I will go through the elimination method. I wish ...

LR
Answered by Lauren R. Maths tutor
4930 Views

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