<span>Amino acids are the basic structural unit of all proteins. A 'free' amino acid (a single amino acid) always has:
an amino group -NH2,
a carboxyl group -COOH
a hydrogen -H
a chemical group or side chain -"R".
Since the amino acids (except glycine) have 4 different groups attached to the a-carbon, they are optically active stereoisomers (recall 23.101 Organic Chemistry) although only L-isomers are found in proteins.
At a neutral pH, both the amino and the carboxyl groups are ionised, giving what is termed the zwitterionic</span>
Answer:
1)The lithosphere/geosphere
2)glaciers and polar ice caps
3)moves bits of rock and soil
4)through compaction and cementation
5)Metamorphic
6)crystalline structure
7)The area was covered by water
8)The layers have different ages with the youngest layers on top
9)temperature and pressure
10)convergent boundaries
11)motion of tectonic plates
12)by studying the direction of S and P waves
Explanation:
Answer:
acetyl CoA
Explanation:
Pyruvate and fatty acids enter the mitochondrion (bottom) and are broken down to acetyl CoA.
Answer:
B
Explanation:
because of osmosis as it goes from low to high
Answer:
A compass needle is affected by Earth's magnetic field.
A magnetic field is strongest at the poles.
Explanation:
