Which of the following is NOT a true statement about bacterial structure and function?
A. Bacteria can have membrane-enclosed organelles such as mitochondria or chloroplasts
B. Bacteria have a single circular chromosome made of double-stranded DNA
C. Bacterial cell walls are made of a substance called peptidoglycan
D. Bacterial flagella rotate to propel the cell
E. Some bacteria have a capsule surrounding the cell, made of a sticky polysaccharide or protein