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Blood Donation Deficiency Disease The Circulatory System CVA Human Anatomy and Physiology - Types of Tissues Musculoskeletal Injuries & Workstation Design Cholera Muscoskeletal Injuries Diseases Communicable or non Communicable Counseling: Fact or Myth? Surgical Vocabulary Cell and Tissue Nutrients in Food Name that Pathogen The Chemistry of MicrobiologyOther quiz:
Types of Doctors › ViewUrologo
A. Surgeon
B. Urologyst
C. Dermathologyst
Microbiology › View
According to Watson and Crick’s model, what forms the “rungs” of the DNA helix ladder?
A. Sugar-phosphate backbones
B. Purines and pyrimidines
C. Major and minor grooves
D. Antiparallel strands