Starch grain Cell wall
The magnification of the photograph is 500. In Figure 1, the labelled starch grain is 1 cm across.
Calculate the actual size of this starch grain. Use the formula:
actual size =
size of image
magnification
cm (2)
Actual size =
(Total 5 marks)

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.