title: Does memory address always refer to one byte, not one bit?
body: <ol>
  <li>Can you confirm that memory address in a PC is alway pointing to one
  byte (8 bits)?</li>
  <li>If a float number needs 32 bits in memory, does the
  computer allocate 4-sequential bytes (32 bits total) to represent
  that number?</li>
  </ol>