The answer is A (<span>Its crystal structure)</span>
They can ensure that chemical reactions occur in safe temperature by only speeding up the reaction in optimum temperate range.
If the temperature is too low, the enzymes may be inactive, and the chemical reactions may be slow.
If the temperature is too high, the enzyme would be denatured and it can no longer function as a biological catalysts.
The eukaryotic cells have nucleus & nucelar bound organelles.
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Cell is highly concentrated compared to blood
To produce an electric current, three things are needed: a supply of electric charges (electrons) which are free to flow, some form of push to move the charges through the circuit and a pathway to carry the charges. The pathway to carry the charges is usually a copper wire.
