Tutor profile: Genie W.
Explain the process of fractional distillation.
Fractional distillation separates mixtures by relying on the different boiling points of fractions. Fractions with a lower boiling point reaches the top of the column where it condenses is collected, while those with a higher boiling point condense at the bottom.
Maltose is a sugar which can only be broken down by maltase. Why is this the case?
The tertiary structure of the maltase enzyme protein contains an active site with a shape complementary to only maltose. As maltose binds to maltase it causes a conformational change named the 'induced fit', allowing the formation of an enzyme-substrate complex. This therefore lowers the activation energy for this reaction.
Mark, a 58 year old man had fallen off his bike this morning and landed on his left wrist. On examination a wrist drop has been noted. Radiological imaging shows a fracture of the scaphoid bone. Which nerve is most likely to have been damaged?