Question

select all that apply
which three of the following are growth factors?

□ vitamins

□ purines and pyrimidines

□ sulfur

□ some amino acids

□ carbon

□ zinc

□ oxygen

Explanation:

Growth factors are organic compounds required in small amounts for microbial/cellular growth that an organism cannot synthesize on its own. Vitamins act as enzyme cofactors for growth-related reactions. Purines and pyrimidines are building blocks for nucleic acids needed for cell division and growth. Some amino acids that an organism cannot synthesize (essential amino acids) must be provided as growth factors. Sulfur, carbon, oxygen, and zinc are macronutrients or micronutrients (inorganic or core building blocks) rather than defined growth factors.

Answer:

• Vitamins
• Purines and pyrimidines
• Some amino acids