What is the key difference among the 20 amino acids that are used to make proteins?

The side groups present in amno acids makes the 20 amino acids different from each other.

Explanation:

Amino acids are used by each cell of living body in order to build the proteins  required to survive. Amino acids consist of two-carbon bond, one is carboxyl group (COO-) and teh other carbon connected to the amino group.

There are total 50 amino acids out of which only 20 are used to make proteins in our body. The side groups present in these 20 amino acids amke them different from each other and used to make protein. Amino acid made up of carboxyl group -COOH , an amine group -NH2 , and atom of H, and variable radical -R.

The side groups are named as polar or non-polar groups or sometimes also called "R" groups. The side goups are responsible to interact with the environment. The polar and nonpolar chemical properties of amino acid allow them to become  hydrophilic (Polar) and hydrophobic (non-polar).

Example: Serine - C3H7NO3 (side chain of HOH2C- )

               Asparagine - C4H8N2O3 (side chain of H2N - CO- CH2-)

Hence, the "R" group is responsible for the variation in 20 amino acids.

events in order:

1.       vishnu schist

2. zoroaster granite

3. bass limestone

4. hakatar   shale

5. igneous intrusion

6. shinumo quartzite

7. dox sandstone

8. tapeats limestone

9. bright angel shale

10. muav limestone

11. temple butte limestone

12. redwall limestone  

nonconformity

answer: the unkar group shows angular unconformity because the layers are turned at angle.

unconformity

answer: specifically the angular unconformity occurs between the cambrian and precambrian rocks. the dox sandstone, shinumo quartzite, hakatar shale, and bass limestone have been filled. an angular unconformity occurs between the cambrian and precambrian rocks. the dox sandstone, shinumo quartzite, hakatar shale, and bass limestone have been filled.

disconformity

answer: the disconformities aremarked irregular lines between the sedimentaryrocks layers.