Based on buoyant density gradient centrifugation, the mammalian genome is divided into five regions which are > 300 kbp in length, characterized by relatively homogenous compositions. These regions are

A. DNA primase B. Primase C. Primer synthase D. All of the above

A. RNA editing B. Antisense RNA C. RNA splicing D. All of the above

A. B-DNA B. A-DNA C. Z-DNA D. All of the above

A. 5' → 3' phosphodiester bonds B. H₂ bonds C. Phosphorylated ions D. Covalent bonds