Which of the following enzymes serve as a catalyst in metabolism

Amylase, Lactase and Pepsin all serve as catalysts in metabolism. A catalyst is a chemical that increases the rate of a chemical reaction without being changed by the reaction itself. Enzymes are catalytic proteins and they are only found in living organisms as part of their life processes. 

one part of the electromagnetic spectrum that arrives on earth as solar radiation from the sun is the visible spectrum. wavelengths of the visible spectrum combine to form what we refer to as

answer - d) ultraviolet radiation.

violet /   380–450 nm / 668–789 thz

violet is number 1 in the chart of visible light.