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Biology
GCSE

A man has a disease caused by a dominant allele. The mother has the disease but the father does not, explain how we know the man is heterozygous for this disease.

So first we must gather the informaton, the disease is caused by a dominant allele, we may call this 'D', the recessive could therefore be 'd'. The mother has the disease, but the father does not. Therefo...

Answered by Lucas C. Biology tutor
2730 Views

What is an enzyme?

An enzyme is a catalyst / which speeds up a reaction. It's a protein and/or it's specific (due to its active site)

Answered by Precious E. Biology tutor
2318 Views

Using your knowledge of the Circulatory System, describe & explain how and why an increase in intensity of exercise leads to an increased heart rate.

Firstly we must understand what exercise does to the body and the Circulatory system. We know that muscles need ATP to contract, this is demanded much more during a more strenuous exercise. ATP is created...

Answered by Tutor62688 D. Biology tutor
3241 Views

Whats the difference between type 1 and type 2 diabetes?

There are important differences between type 1 and type 2 diabetes. They happen in people of different ages and present differently. Type 1 diabetes is found in younger people and is because your body has...

Answered by Katba I. Biology tutor
3275 Views

What's the difference between aerobic and anaerobic respiration?

In short Aerobic is with oxygen - think aero=air, therefore oxygen is present. This process also produces more energy and takes place on mitochondria only producing carbon dioxide and water from glucose a...

Answered by Oliver B. Biology tutor
3140 Views

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