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How does a heterogenous catalyst work? (3 marks)

Reactants are adsorbed onto the surface of the catalyst (1). Bonds forms between the atoms and molecules on the surface (2), and the products desorb (3).
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Answered by Yva P. • Chemistry tutor
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Describe how mutations in tumour suppressor genes can lead to the development of tumours

Tumour suppressor genes (TSGs) are genes whose protein products restrain inappropriate cell growth and division. A mutation results in a changed amino acid sequence, which alters the tertiary structure of th...
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Answered by Yva P. • Biology tutor
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Interview Question: What medical work experience have you carried out?

Work experience is a great way to show to demonstrate your interest in medicine, whilst also ensuring that you're aware of some of the more challenging aspects of the career. Whilst the ideal placements woul...
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In the triangle ABC, AB = 16 cm, AC = 13 cm, angle ABC = 50 and angle BCA= x Find the two possible values for x, giving your answers to one decimal place.

Using the sine rule: sina/A = sinb/Bsinx/16 = sin50/13sinx = 16 * (sin50/13)sinx = 0.943x = 70.5 and 109.5
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Answered by Yva P. • Maths tutor
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How can a volcanic eruption be predicted?

Constant monitoring of a volcano is crucial in being able to predict an upcoming eruption. Various technologies are used by volcanic monitoring stations, such as the Hawaiian Volcano Observatory, to detect c...
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Answered by Lydia P. • Geography tutor
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