What is the source of the energy that causes electrons to be emitted from the surface?

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.

In the following redox reaction which is the oxidizing agent and which is the reducing agent? alcl3 + na nacl + al

6what is the importance of water on earth? a) it keeps the top layer of the geosphere cool b) it allows life to exist c) it provides ice at the poles d) it creates earth's blue color from space