The side chain of which of the following amino acids is negatively charged at ph

Question

The side chain of which of the following amino acids is negatively charged at physiological pH (~7)?

Glutamate

Serine

Lysine

Glutamine

3.3 points   

QUESTION 6

Match the structures with the names of the amino acids.

aa A

aa B

aa C

aa D

serine

tyrosine

methionine

phenylalanine

glutamine

tryptophan

arginine

alanine

leucine

valine

lysine

asparagine

glycine

isoleucine

threonine

aspartate

glutamate

histidine

cysteine

proline

3.3 points   

QUESTION 7

Protein kinases serve to add phosphate groups (donated typically by ATP) onto the side chains of certain amino acids with hydroxyl groups (–OH), thereby activating their substrate proteins. The amino acids that can thus become “phosphorylated” are all of the following EXCEPT

tryptophan residues.

tyrosine residues.

serine residues.

threonine residues.

3.3 points   

QUESTION 8

Which of the following amino acids is found in -turns more often then the others?

Tryptophan

Leucine

Glycine

Phenylalanine

Histidine

Glutamate

Serine

Lysine

Glutamine

Explanation / Answer

1)

The side chain of which of the following amino acids is negatively charged at physiological pH (~7) is

Glutamate because it has a carboxylic group which is negatively charge at pH =7

and no other amino acid given have negative charge.

2) question is not clear

3)

tryptophan residues because it has no -OH group

4)

Glycine is often found in the beta turns due to their unchirality nature.

Related Questions

Navigate

• Browse (All)
• Browse T
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.