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a) Proteins, which are highly-folded poplypeptides, are broken down into shorter polypeptides, and then into amino acids, by protease enzymes.

b) Fats, or lipids, are broken down by enzym...

Enzymes are biological catalysts - they 'speed up' biological reactions - essentially increasing the rate at which they occur.

Pepsin is an enzyme that catalyses the digestion of proteins...

All of this is to do with moving stuff over a barrier called a cell membrane.

I want you to imagine the cell membrane to be like a border of a country and the stuff to be different pizzas...

Oxygenated blood flows into the left atrium from the lungs via the pulmonary vein, when the left atrium contracts the blood flows down into the left ventricle via the mitral valve (which divides the at...

Here a thoroughly thought out response to the question should be formulated it is not enough to simply know the name and role of plant hormones within it.
Start with a factor, it is helpful to kn...