How Many Amino Acids Are Considered to Be Essential

question 54

Multiple Choice

How many amino acids are considered to be essential?

• A)none
• B)five
• C)nine
• D)20

---

Definitions:

Ex Situ Conservation

The strategy of preserving endangered species or genetic materials outside their natural habitats, such as in zoos, seed banks, or aquariums.

CFC

Chlorofluorocarbons, compounds containing carbon, chlorine, and fluorine, known for their role in ozone depletion.

O3

Ozone; a molecule composed of three oxygen atoms, significant as a protective layer in the Earth's stratosphere and as a pollutant at ground level.

Biosphere Reserves

Zones designed and set aside to protect biodiversity, promote sustainable development, and foster research and conservation education.