Proteins

Question 1

The carbon adjacent to the primary carboxylic acid group is the

Answer 1

Alpha carbon

Question 2

How is the absolute configuration of AAs defined

Answer 2

As L- or D-, with reference to glyceraldehyde

Question 3

What is the natural configuration of AA

Answer 3

L

Question 4

Proteogenic

Answer 4

Serve as substrate for polypeptide synthesis

Question 5

4 classes of AA

Answer 5

Proteogenic, chemical, nutritional and metabolic

Question 6

Protein AA

Answer 6

Serve as substrates for polypeptide biosynthesis

ex. Leucine, alanine, serine

Question 7

Non protein AA

Answer 7

Not building blocks of polypeptides

ex. Citrulline and ornithine

Question 8

Conditionally essential AA

Answer 8

Can be made by the body, but needed to be provided when rate of use is higher than rate of synthesis

Question 9

Glucogenic AA

Answer 9

Yield pyruvate or key intermediates of TCA that have potential to yield glucose

Question 10

Ketogenic AA

Answer 10

Yield acetyl CoA or acetoacetyl CoA, which are precursors of ketone bodies