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What is a protein? How are proteins made?

Proteins, also known as polypeptides, are amino acid sequences . All proteins are made of amino acids.Proteins exhibit variance . This is due to the fact that there can be a myriad of possible combinations :...
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Answered by Francesco G. • Biology tutor
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What is a mutation and what are the consequences of one?

A mutation is a change in the genetic composition of the DNA. It is often caused by an accidental insertion, deletion or swapping of a single base however whole genes can also move. SNPs, or single nucleotid...
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Answered by Liam M. • Biology tutor
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How does air enter the lungs for inspiration? What does the body do to make this happen?

Intercostal muscles and the diapragm contract, which causes the ribs to move upwards and outwards. This increases the volume of the thorax, therefore lowering the pressure within the lungs. The pressure of t...
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Answered by Isobel R. • Biology tutor
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What is a reflex action and along which pathway does it travel in the nervous system?

A reflex action is an automatic rapid involuntary response, which acts to protect the body from damage. Such as when you touch something extremely hot, you involuntarily remove your hand from the hot object....
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Answered by Isobel R. • Biology tutor
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What is an enzyme?

An enzyme is known as a biological catalyst. This is because they can speed up reactions by providing an alternative pathway, lowering the activation energy of the reaction. They are normally composed of a p...
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Answered by Liam M. • Biology tutor
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