"Home" and "End" keys on the standard keyboard

Hi, it may sound a stupid question but as a prospective MacBook user, one of my main issues is that there are no "Home" and "End" keys on the standard keyboard. Unless I've missed something very obvious, is there any shortcut for these buttons?
Thanks

Command + up arrow = home, (beginning of document) and Command + down arrow = end (end of document). Command + left arrow = beginning of sentence while command + right arrow = end of sentence. The full sized keyboards (wired) for the iMac have a Home and End key located in the same place as it would be on a PC keyboard.