Top answers

Describe how an antibody works?

Binding sites on the antibody are complementary to specific binding sites on antigen. Antibodies group together/in groups of 5 (pentamers) and attach to antigen presenting pathogens, forming antigen-antibody...
AP
Answered by Adam P. • Biology tutor
3101 Views

What were the social and economic consequences for African Americans in Southern states in the aftermath of the American Civil War?

The social and economic consequences for African Americans in Southern states after the conclusion of the American Civil War in 1865 were varied. On one hand, white plantation (and slave) owners lost their s...
HB
Answered by Harriet B. • History tutor
3877 Views

Factorise and solve the quadratic equation x^2 + 6x + 8 = 0

Theory Problems like this need to be broken down into steps: i) Factorise, ii) solve and iii) check. The aim of this question is to find values of x which satisfy the quadratic equation, i.e. when we substit...
TD
Answered by Tutor87306 D. • Maths tutor
10336 Views

To what extent was the policy of appeasement inevitable in the late 1930s?

Given the prevailing reformation of the balance of power in Europe due to the rise of nationalism and the ongoing Spanish Civil War from 1936-1939 which reflected a microcosm of interwar Europe, the Great Po...
DM
Answered by Dionysia M. • History tutor
2247 Views

Why is the control of insulin called "negative" feedback? How does it work?

Negative is a slightly confusing term, as it seems to imply that the control is bad, when in reality it is vital to being alive! Negative in this sense is used in a mathematical way, meaning "removing&q...
AP
Answered by Andrew P. • Biology tutor
9033 Views