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Describe the stages of phagocytosis (4 marks)

Phagocytes (white blood cells) recognise pathogens via receptors and chemoattractionPhagocytes engulf the pathogen, forming an intracellular compartment called a phagosome Lysosomes fuse with the phagosome t...
Answered by • Biology tutor
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explain how a parachutist reaches a constant speed using the concept of terminal velocity.

1 - parachutist is in plane, they are stationary so according to Newton's first law the forces acting on them (weight downwards and reactionary force upwards) are equal. 2 - parachutist leaves the plane. Hav...
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Answered by annabel k. • Physics tutor
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Potassium forms an ionic compound with sulfur. Describe what happens when two atoms of potassium reaction with one atom of sulfur (5 marks)

In this question we need to give our answer in terms of electron transfer: Electrons are transferred from potassium to sulfur. Two potassium atoms each lose one electron forming K + ions. Sulfur gains two el...
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Answered by Megan L. • Chemistry tutor
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Work out the value of n, the value of A & the value of B (question given below in correct subscript)

(2x 3/2 y -1 ) n = Ax 6 y B First of all both sides need to be written in the same format so simplify the left hand side. 2 n (x 3/2 ) n (y -1 ) n We are given the power of x is 6 so we can write and equatio...
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Answered by Megan L. • Maths tutor
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Compare anaerobic respiration in a yeast cell with anaerobic respiration in a muscle cell (3 marks)

This is a comparison question therefore all statements must compare the two types of cells in the question- muscle and yeast. This question is worth 3 marks so we should give 3 statements. What do we know ab...
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Answered by Megan L. • Biology tutor
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