What can be said about prokaryotes and eukaroytes?
a. prokaryotes always have a nucleus, but eukaryotes don't.
b. both of these cell types contain a nucleus.
c. eukaryotes always have a cell membrane, but prokaryotes don't.
d. both of these cell types contain genetic material.

All of the following statements about enzymes are correct except: proteolytic enzymes are also known as proteases. pectin methyl esterase causes browning of cut fruit. cloud loss in orange juice is due to enzyme activity. proteolytic enzymes in fish cause tissue softening during storage.