★ Skin Appendages Quiz
The tiny grains of pigment deposited in cells that provide skin with its color are?
A. protein
B. keratin
C. melanin
D. collagen
Select your answer:
Topics:
Lifestyle Diseases Motor Neuron Disease Advanced Stretching SM2 Joints Molecular Genetics Integrated Science Medicine Clinics Epidemiology Mutations Cell Diversity - Organization, Tissues, Plants and Animals Skin Structure, Growth & Nutrition Skin Growth Brain/Neuron Anatomy Communicable Diseases and Immune Response (OCR) Branches of Microbiology Muscle TissueOther quiz:
Biology › ViewDeficiency of which of the following nutrients is the most common cause of goiters?
A. Iodine
B. Calcium
C. Iron
D. Vitamin C
Protein and Amino Acid Metabolism › View
Which amino acid is a precursor for neurotransmitters and plays a crucial role in brain function and mood regulation?
A. Arginine
B. Leucine
C. Methionine
D. Tryptophan