Is RNA-binding enzyme RNase A more likely to have a pI of 9.2 or 5.0? Briefly explain your reasoning.
a) pI of 9.2 because it is a basic enzyme
b) pI of 5.0 because it is an acidic enzyme
c) pI of 9.2 because it binds to RNA
d) pI of 5.0 because it cleaves RNA