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Explain how a change in one amino acid in an enzyme molecule can stop the enzyme working.

This is because the altered amino acid codes for a different protein (an enzyme is a protein) to be created. This protein has a different 3D structure and shape meaning that it's active site, where the su...

Answered by Beatrix T. • Biology tutor

12054 Views

Outline ways in which behaviourists can treat phobias.

One popular way of treating phobias is by systematic desensitisation which is based on the principle of classical conditioning. It involves creating an anxiety hierarchy and using relaxation techniques to...

Answered by Beatrix T. • Psychology tutor

2959 Views

Tim flies on a plane from London to Tokyo. The plane flies a distance of 9000 km. The flight time is 11 hours 15 minutes. Work out the average speed of the plane in kilometres per hour.

Speed = Distance/TimeSpeed = 9000/11.25Speed = 800 km/h

Answered by Nicholas E. • Maths tutor

3704 Views

Describe and explain how the structure of the small intestine is adapted for absorbing the products of digestion.

The small intestine's structure is adapted in two main ways to aid in the absorption of the products of digestion. Firstly, the small intestine's surface is covered in villi which help to increase the sur...

Answered by Tom D. • Biology tutor

6823 Views

How do I improve at close reading?

The key to successfully analysing a piece of writing - whether it's a poem, or a play, or a passage of prose - is to "read" from the large to the small.This means that you should first consider ...

Answered by Gabriel M. • English tutor

2263 Views