Is it easier to identify an unknown metal by such as physical properties as colour, lustre, mass, and volume, or by characteristic physical property such as density? explain your answer.

Imagine that you have produced several versions of lactase, each of which differs from normal lactase by a single amino acid. describe a test that could indirectly determine which of the versions significantly alters the three-dimensional shape of the lactase protein.

What provides structure to the human body?

What happens when the temperature of a solution increases?