Question #1: (1.5 point) The side chain of serine is non-polar because even thou

Question

Question #1: (1.5 point) The side chain of serine is non-polar because even though it has two types of atoms that have differences in electronegativity, it is not asymmetrical. a.) True b.) False Question #2: (1.5 point) Consider the amino acid His at pH 7.8. Its side chain has a pKa of 6. What is the ratio of base to acid for this group at this pH? a.) 6:1 b.) 63:1 C.) 631:1 d.) 630957:1 e.) 1:631 Question #3: (1.5 point) Biomolecules are held together and assume their shapes due to a mixture of covalent and non-covalent bonds. a.) True b.) False Question #4: (1.5 point) At pH 1 will the alpha carboxyl group of W likely be charged OR uncharged? You must spell out the one word answer correctly for credit.

Explanation / Answer

1. False - Serine is a polar amino because it have energetically favorable contact with water.

2. pH = 7.8

pKa = 6

we have,

pH = pKa + log([base] / [acid])

7.8 = 6 + log([base] / [acid])

log([base] / [acid]) = 1.8

[base] / [acid] = 101.8

[base] / [acid] = 63.1

Thus, base : acid = 63:1

3. True - Biomolecules are held together and assume their shapes due to a mixture of covalent and non-covalent bonds.

Related Questions

Navigate

• Browse (All)
• Browse Q
• Subjects

---