The best answer is letter A.
The main factors that change the speed of enzymatic reactions are temperature, pH and substrate concentration (quantity). <span>There are enzymes that need other associated molecules to work. These molecules are called enzyme co-factors. They can be organic ions like mineral salts.</span>
Answer: B. Allow light to pass through. :)
The name come from the German 'Bisemutum' a corruption of 'Weisse Masse' meaning white mass.
