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Biology

A Level

What is the Hardy-Weinberg equation?

The Hardy-Weinberg equation is: p²+2pq+q²=1

It is important to remember that p+q also equals 1.

Answered by Marlie C. • Biology tutor

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What is the difference between Evolution and Natural Selection?

The theory of Evolution by Natural Selection was first proposed by Darwin in 1859. Evolution is the observation that species change over time, for example the beak of birds getting larger or the neck of g...

Answered by Anna D. • Biology tutor

10267 Views

Enzyme inhibitors are often used as antiretroviral drugs in the treatment of HIV. Describe the structure of an enzyme and suggest how antiretroviral drugs would work in the treatment of HIV.

Enzymes are globular (globe-like) proteins, meaning they exist as 3D structures. As a protein, it is composed of a chain of amino acids which is able to fold into secondary structures such as alpha-helice...

Answered by Declan C. • Biology tutor

2725 Views

What are genes and how do work?

Genes are the code that makes up all life on Earth. Genes are sections of the long chain-like molecule called DNA, which is found coiled up into chromosomes in the nucleus of cells. The most important par...

Answered by Anna D. • Biology tutor

2550 Views

Trypsin is a protease produced in an inactive form in some cells of the pancreas. Suggest the advantage of producing it in an inactive form?

Trypsin is a protease that acts in the small intestine to digest proteins. The advantage of it being produced inactive form in the pancreas is so that it doesn't digest pancreatic proteins. This means it ...

Answered by Sarah A. • Biology tutor

18206 Views