<em>The correct option is a) the greatest reaction for this enzyme will be in tubes 4 and 5. </em>
Explanation:
As the information in the question shows, the enzyme was isolated from a bacterium which is adapted to live in hot springs where the temperature range is 50 to 80 degrees Celsius. Hence, we can deduce that the enzymes in this bacteria work best at this temperature range or his temperature range can be considered to be optimum for the enzymes of this bacteria. Hence, the greatest reactions will be seen in the tubes 4 and 5 as the temperature will be perfect for the working of the enzyme.
