These important macromolecules act as catalysts to help carry out the thousands of chemical reactions that take place in cells. What is this
macromolecule?
A) lipid - hormone
B) protein - enzyme
C) nucleic acid - RNA
D) carbohydrate - cellulose

About __ of the mass of the cell is water

How did alexander fleming’s research solve a societal problem? he developed ways to treat inherited diseases. he advocated for regular hand washing to kill germs. he discovered a new type of medicine that could treat infections. he discovered the cause of mad cow disease, an emerging disease.

Why does the earth spin slowly, not faster? is it possible to prove it scientifically? can you prove it with math?