You want to make a grilled cheese sandwich. The weight of each slice of bread is 1.4 grams and the cheese weighs 21 grams. What is the total mass of your grilled cheese sandwich?

Explain why biological control methods are generally environmentally superior to chemical pest control methods.

Which of the following is required of a new drug?me

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.