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What are the models for enzyme action and how to remember the differences?

The two models to explain the actions of enzymes with substrates are the Lock and Key model & Induced fit model. In lock and key the enzyme is the lock and the substrate is the key. As with a lock and th...
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Answered by Thomas P. • Biology tutor
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Why are active transport and diffusion different?

Active transport is the movement of molecules, usually against the concentration gradient (going from low concentration into a higher concentration), and it requires energy. Diffusion is the movement of mole...
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Answered by Victoria C. • Biology tutor
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What is eutrophication? Explain how this process can cause harm to the environment, particularly when farmers apply fertiliser to their land.

Eutrophication describes a process wherein a substance containing excessive levels of nutrients, in this case fertiliser, is applied to land and leaches off into nearby bodies of water (often as a result of ...
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Answered by James C. • Biology tutor
3073 Views

What is the function of bile in digestion?

Bile is used in the digestive system to emulsify fats. This means that it breaks down the fats into smaller fat droplets creating a larger surface area for the digestive enzymes to work on.
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Answered by Poppy K. • Biology tutor
7457 Views

Explain how energy moves through a habitat in a food chain.

The sun provides the initial energetic input for most terrestrial and aquatic ecosystems. Producers (commonly green plants) transform sunlight into food via photosynthesis where light energy is converted to ...
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Answered by Sam G. • Biology tutor
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