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Outline the process of ATP generation by chemiosmosis.

This is a process that occurs on the membrane of the mitochondria. Here the electrons are passed from one electron carrier to the next in a chain know as the electron transport chain. With each carrier being...
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Answered by Anushri J. • Biology tutor
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Can you explain the four levels of protein folding?

Proteins form from basic structures and fold into larger, more complex ones. They start as simple chains of amino acids, this is known as the primary structure of a protein. They then fold into secondary str...
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Answered by Caitlin C. • Biology tutor
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What is the difference between a saturated and an unsaturated? (2 marks)

A saturated lipid has no carbon double bonds in the R group of the fatty acid.An unsaturated lipid has one or more carbon double bonds in the R group of the fatty acid.
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Answered by Lydie K. • Biology tutor
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Describe the passage of blood through the left side of the heart. Include the names of the valves between the chambers.

This is a typical question that could be asked in your exam and so it’s important to break it down in terms of its content, as well as its format. format: this is a describe question and thus doesn’t need va...
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Answered by Lewis H. • Biology tutor
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Describe and explain how the human lungs are adapted for efficient gas exchange (3 marks)

There are millions of alveoli (gas exchange surface), so they have a very large surface area collectively, which is further increased by having a folded membrane. A larger surface areas means there is a fast...
Answered by • Biology tutor
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