1.Explain the biological role of chlorophyll

Chlorophyll acts as photosensitizer. Transfers energy to carbon di oxide and water molecule and helps in photosynthesis.

2.Define standard hydrogen electrode. What is its potential?

SHE is the universal reference for reporting relative half-cell potentials.The value of standard electrode potential is zero.

3. What is the application of Henderson Equation

It is used for estimating the pH of a buffer solution and to calculate the isoelectric point of proteins.