A ddNTP, used often in DNA sequencing, lacks a(n) carbons.

Molecular biologists rely on many, often sophisticated, techniques to pursue their
discipline. Ultracentrifugation, electron microscopy, X -ray diffraction, electrophoresis, and computer interfacing are fundamental tools. Model organisms provide the raw materials for study. List three organisms (or organismic groups) often used by
recombinant DNA technologists and describe a major advantage of each group.

Assume that a plasmid (circular) is 3200 base pairs in length and has restriction sites at the following locations: 400, 700, 1400, 2600. Give the expected sizes of the restriction fragments following complete digestion.