This is the energy that comes to earth from the sun.

Hemoglobin is a proton that carries oxygen around your body what is hemoglobin made from

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.

Add solid urea to a beaker of water. the beaker gets very cold. is δh favorable or