A dental assistant qualified to perform coronal polishing is preparing for the next patient, a 50-year-old smoker who has had a moderate amount of direct composite resin and indirect porcelain posterior restorations placed. Following the patient's adult prophylaxis by the
hygienist, the dental assistant is asked to do selective polishing. What instruments and materials will be required?

yes we can.   a lady urinates from her urethra.

answer: the correct option is d. enzyme

lactase and carbonic anhydrase are the examples of enzymes.

lactase is an enzyme, which is present in the small intestine of mammals. it in the digestion of the disaccharide, lactose ( milk sugar) by converting it into two monosachharide, which are glucose and galactose.

carbonic anhydrase is present in the red blood cells. this enzyme plays significant role in the transport of co₂. it in the conversion of co₂ and h₂o into carbonic acid, which is then dissociated into bicarbonate ions and hydrogen ions.