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A student carries out an experiment to determine the melting point of a waxy solid. She heats a sample until it melts, then measures and records its temperature as it cools down. Explain how the student could use her results to decide whether the waxy

...solid is a pure substance or a mixture.
Firstly, she would need to plot a graph of temperature against time. Temperature remains constant at the melting point. The graph will show whether the sol...

LE
7183 Views

Describe how alterations to tumour suppressor genes can lead to the development of tumours.

Alterations to tumour suppressor genes such as their increased methylation, mutation in the genes, or an instance where the tumour suppressor genes are not being transcribed or expressed, results in rapid...

LE
Answered by Lucy Erin S. Biology tutor
10698 Views

Explain the lock and key model of enzyme action, including how they are denatured.

An enzyme is a protein that functions as a biological catalyst by speeding up chemical reactions and remaining unchanged by the reaction. The place on an enzyme where the molecule binds is called the acti...

LE
Answered by Lucy Erin S. Biology tutor
7078 Views

How does nervous input in a human cause increase cardiac output during exercise?

The nervous system can be divided into two branches-the parasympathetic branch and the sympathetic branch. The activity of the sympathetic nervous system is increased in response to exercise. This respons...

TR
Answered by Tamarind R. Biology tutor
4361 Views

How does Fitzgerald present the theme of isolation through the character of Jay Gatsby in 'The Great Gatsby'?

Gatsby is the primary representation of a figure that is completely isolated due to his disassociation with reality, and the belief that by simply acquiring wealth he will be able to secure Daisy’s love. ...

Answered by English Literature tutor
23707 Views

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