★ Biochemistry Quiz
If an atom has 15 protons, 16 neutrons, and 15 electrons, what is its:
A. Atomic number: 15, Mass number: 31
B. Atomic number: 16, Mass number: 31
C. Atomic number: 15, Mass number: 30
D. Atomic number: 31, Mass number: 15
Select your answer:

Topics:
Integumentary and Musculoskeletal System Monoclonal Antibodies Kidney - Loop of Henlé Hematologic System The Human Eye Knee Anatomy Nutrition form 2 Beneath the Skin Anatomy & Physiology: Respiratory Circulatory & Respiratory System History of Immunology Health Issues Related to Digesting System and Eating Habits Microorganisms, Health and Diseases Human Anatomy and Physiology - Types of Tissues Skin and DerivativesOther quiz:
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A. interphase
B. mitosis
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What is the main symptom of goiter?
A. Swelling of the neck or larynx
B. Heat intolerance
C. Obesity
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