Topics: Microbiology Quiz
What is the structure of purines in DNA nucleotides?
A. A single-ring structure with a six-carbon ring
B. A double-ring structure with a six-carbon ring fused to a five-carbon ring
C. A double-ring structure with two six-carbon rings
D. A single-ring structure with a five-carbon ring
Select your answer:
Topics:
Blood and Bones Principle of Health Science Health and Diseases CP A&P: Cardiovascular Brain/Neuron Anatomy Bacteriology Lab Culture Media Bacterial Protein Synthesis Inhbitors Health Systems Carbohydrates The Digestive System Blood and Hematology Asthma Digestion and Microbes Medicine on the Western Front Medical VocabularyOther quiz:
First Aid › ViewAn accident victim has a badly broken arm and you can see the bone. What should you give them?
A. Some aspirins for the pain
B. Several glasses of water or a hot drink
C. Nothing to eat or drink until they see a doctor
D. A shout-out on social media
Disease, Immunity, and Phatogens › View
A pathogen that depends on living things to reproduce is a
A. Bacteria
B. Virus
C. Fungi
D. Parasite