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How does oxidative phosphorylation work in respiration

Reduced NAD/FAD from previous stages of respiration (glycolysis, link reaction, Krebs cycle) relocate from the mitochondrial matrix to the inner mitochondrial membrane. At this point they are oxidised, losin...
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Answered by Fionn M. • Biology tutor
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What is the Hardy-Weinberg equilibrium and when is it used? With an example

The Hardy-Weinberg equilibrium is used to work out dominant and recessive allele ratios in a population regarding one gene. Dominant alleles are those which when at all present in the genotype develops a par...
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Answered by Ellie B. • Biology tutor
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Explain how water is re-absorbed in the kidney

It would be helpful for you to have a diagram of a kidney nephron in front of you as you read this explanation. The body has a clever mechanism to conserve water levels, it creates a strong salt concentratio...
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Answered by Charlotte D. • Biology tutor
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What is selective reabsorption?

Selective reabsorption occurs because during ultrafiltration, important components of the blood are filtered out and they need to be reabsorbed into the body. When the filtrate leaves the Bowman's capsule an...
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Answered by Charlotte D. • Biology tutor
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What is ultrafiltration?

Ultrafiltration is a process in the kidney by which urea, salt, water and glucose etc. is extracted from the blood. When blood passes through the top of the nephron, it enters a structure called the glomerul...
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Answered by Charlotte D. • Biology tutor
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