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Describe the Structure of a DNA molecule

A DNA molecule is double stranded and arranged in a helical structure. The two strands are made up of a sugar phosphate 'backbone' where the sugar is attached to a base and a phosphate group, the sugar is de...
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Answered by Adam O. • Biology tutor
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What is the difference between a conformer and a regulator?

A conformer is an organism which is unable to regulate its own internal temperature, therefore, it's internal environment is dependent upon its external environment (e.g. lizards). Whereas a regulator is an ...
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Answered by Heather D. • Biology tutor
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Describe what is meant by the term mutualistic symbiotic relationship and provide an example of one.

A mutualistic symbiotic relationship is a relationship between 2 different species where both species benefit. For example, the relationship between a plant and its pollinators is a mutualistic symbiotic rel...
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Answered by Heather D. • Biology tutor
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Describe the requirements, process and applications for Polymerase Chain Reaction (PCR)

Requirements· Original DNA sample (to be amplified)· dNTPS (4 DNA nucleotide bases)· Thermal cycler (reaction vessel)· Buffer solution (to maintain stable pH)· Taq Polymerase· DNA primers (forward and revers...
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Answered by Verity L. • Biology tutor
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There are many specialised cells in the body which have developed from embryonic stem cells. What is the name used to describe this process? Go on to describe how this process may occur.

Process - Differentiation. Explanation - The only genes which are expressed in the cell are those which are characteristic to that cell type.
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Answered by Rory B. • Biology tutor
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