Under standard conditions, the best way to observe more details in a microscopic specimen is to 1. decrease resolution
2. increase resolution
3. increase scatter.
4. increase magnification
5. decrease magnification .

Lactase is essential for digesting lactose in milk. this enzyme is specific for this sugar. why? molecules and active sites vary in size; only properly sized molecules can fit. there is a precise compatibility between the active site and the lactose molecule. specificity refers to the action of the enzyme, such as hydrolysis, and relatively few molecules can be hydrolyzed. reaction-specific enzymes assume a fit by folding around the most numerous substrate molecules.