Select your answer:
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Food Microbiology Asexual Reproduction Biodiversity Conservation Ankle, Foot, & LL - Injuries Digestive System Heart Genetics Vocabulary Regulation of Heart Rate Common Diseases in Human Beings Vitals Principles of Microbiology Pediatrics Osteoporosis Advanced Stretching SM2 Cell Theory and Cellular StructureOther quiz:
Microbiology › ViewWhich of the following is not a nitrogenous base in DNA?
A. Adenine
B. Thymine
C. Guanine
D. Ribose
HHB Immunology › View
molecule (often a protein) on the cell surface that can trigger an immune response in the body
A. antigen
B. cytokines
C. memory cells
D. lymphocyte