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Briefly describe the terms "antigen" and "antibody", and describe the structure of the latter. Briefly describe the processes of opsonisation, phagocytosis and destruction of bacteria by macrophages.

An “antigen” is a specific foreign molecular entity which is bound by antibodies during an immune response. Examples of antigens include peptides from bacterial surface proteins, which signal the presence of...
AR
Answered by Andrew R. • Biology tutor
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In an experiment a burrette was identified as the largest source of uncertainty, how could this uncertainty be reduced?

A burrette is a measuring apparatus a burrette measures the volume of liquid delivered during a titration. with each measurement there is an uncertainty with the recorded measurement of delivered liquid. Whe...
JG
Answered by Jarrod G. • Chemistry tutor
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Outline the change we have seen in organisational culture using examples. Discuss whether the idea of culture can be managed.

The word ‘Culture’, is, as argued by Peter, one of the most complicated words in the human language. Prior to outlining how culture has changed and discussing whether it can be managed, we firstly need to de...
JW
2051 Views

find the diffrential of 3sin2x+4cos2x

dy/dx=6cos2x-8sin2xExplanation: cos x difrentiates to -sinx, we must times the coefficient of cos2x,(4) , by the differential of 2x (ie 2), giving -(4x2)sin2x.Similarly, sinx differentiates cosx, so using th...
AC
Answered by Amy C. • Maths tutor
6346 Views

You have three keys in your pocket which you extract in a random way to unlock a lock. Assume that exactly one key opens the door when you pick it out of your pocket. Find the expectation value of the number of times you need to pick out a key to unlock.

Let X be the random variable for this question. P(X=x) = 1/3 for all x. When X=x, we have that it took x times for us to retrieve the correct key.Thus, we have the infinite sum 1/3 + 2 2/3 1/3 + 3*(2/3)^2 1/...
NO
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