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Answering questions in biology that offer more marks is all about key words - usually the examiner has a few of these in front of them that offer a mark simply for using the word in your answer. The go...
In the double circulation system there are two routes that the blood can take:
1. Through the lungs
2. To the rest of the body
The blood starting in the heart ...
First of all we have to understand that there are concentration gradients between cells and the outside. A higher concentration of solute is when there is more solute (eg salt) ...
The heart has four chambers; the right ventricle and atrium, and the left ventricle and atrium. Deoxygenated blood, once it has travelled the entire body, enters the heart from the vena cava into the r...
The structure of proteins, especially those of enzymes, is extremely important in allowing them to carry out their duties in the cell and body. Protein folding needs to be specific, and repeated exactl...
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