★ Organic Compounds, Minerals and Enzymes Quiz
Nitrogen is vital to life because it is a key component of:
A. proteins
B. laughing gas
C. carbohydrates
D. lipids
Select your answer:

Topics:
Health and Social Care Philosophy Human Body and Pathogens Stress Parts of Human Body Measles and Hib Obesity Hair Evidence Vital Signs Physical Fitness Deficiency Diseases Genes, Genomes & Alleles Regulation of Urine Formation Special Senses Communicable Diseases and Immune Response (OCR)Other quiz:
Body Systems › ViewWhich of the following is NOT one of the five human senses?
A. Hearing
B. Reflex
C. Touch
D. Taste
Microbiology › View
The greatest number of pathogens enter the body through the ______.
A. Skin
B. Respiratory System
C. Urinary System
D. Gastrointestinal system