mac - where is HOME and END key for MacBook Pro?

I am using a MacBook Pro running Mac OS X 10.5. I am new to this development environment, and previously worked on Windows.

I am wondering what is the HOME key (goes to the begin position of a line in text file) and END key (goes to the end position of a line in text file) on the Mac? My MacBook Pro seems to not have these two keys on the keyboard.

Thanks in advance.