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Proof by contradiction works by working of the assumption a statement is true, then showing it contradicts with a known truth. It's easy to rote learn the main ones required for Maths A Levels (irriationa...

This is because helper T cells are required to cause the proliferation of plasma B cells that produce antibodies once they recognise the antigen on an antigen presenting cell as harmful.

Collective responsibility is the concept that members of the cabinet cannot pubically disagree with the decisions of the cabinet and must agree and support any decisions made.

Ka for ethanoic acid = 1.74 × 10–5 mol dm^–3 also given in question. moles = concentration x volume / 1000Ka = [H+] [A-]/[HA]pH = -log [H+]
initial moles:NaOH: 20x0.1/1000 = 0.002molCH_...

There are 2 types; amylose and amylopectin which are both made of alpha glucose and are tightly coiled. while amylopectin has branches and 2 bonds, 1-4 and 1-6 glycosidic bonds, amylose only has 1-4 glyco...