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Describe the diference between an object and a class

A class defines the propertices and methods of a group of similar objects. While an object is a specific instance of a class

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Explain why the first ionisation energy of Al is less than that of Mg?

The outer electron on aluminium is removed from the 3p sub-level, whereas the outer electron on magnesium is removed from the 3s sub-level.The 3p sub-level is higher in energy than the 3s sub-level.Alumin...

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Describe how you would use a biochemical test to show that a solution contained a protein (2 marks)

Biuret testThe solution colour changes to: Lilac / purple / mauve / violet(specific colour required, reject blue or pink)

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Name two enzymes involved in DNA replication (2 marks)

DNA helicase (1 marks)DNA polymerase (1 marks)

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Which of the following was of greater importance as a reason for overseas exploration, 1445-1570? (i) Religion (ii) Technological change

Religion was undoubtedly a vital motivating factor for overseas exploration in Spain and Portugal. Within the Reconquista, ending for Portugal with the capture of Farzo in 1249 and for Spain with the conq...

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