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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...
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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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Why do the concentrations of Glycerate-3-phosphate in the chloroplast decreases after dark?

Glycerate-3-phosphate is a compound made during the calvin cycle in the leaf stroma. The calvin cycle is a light independent reaction, so continues when the light concentration decreases. To convert Glycerat...
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How does allopatric speciation work?

Allopatric speciation occurs when the population of a species becomes divided and the two (or more) groups are isolated from one another. Different factors in the environment of each group will affect the pr...
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Answered by Georgia W. • Biology tutor
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Explain why the binding of one oxygen molecule to haemoglobin makes it easier for a second molecule of oxygen to bind.

The binding of the first oxygen molecule changes the tertiary and therefor the quaternary structure of the haemoglobin molecule, therefore exposing another binding site making is easier for the second molecu...
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