Which of the following statements describes how enzymes differ from ordinary chemical catalysts?
Enzymes are inorganic in nature.
Enzymes catalyze select chemical reactions.
Enzymes bind their substrates for a brief time.
Enzymes increase the rate of a chemical reaction.

Calculate the molar mass of aluminum oxide (al2o3). express your answer to four significant figures.

Identify and describe the three ways that mutations affect organisms.

If the concentration of phosphate in the cytosol is 2.0 mm and the concentration of phosphate in the surrounding fluid is 0.1 mm, how could the cell increase the concentration of phosphate in the cytosol? a) passive transportb) diffusionc) active transportd) osmosise) facilitated diffusion