W1 - Intro to Amino Acids + Proteins

Question 1

What are the 3 forms of nomenclature for amino acids?

Answer 1

Full name, 3 letter code and 1 letter

Question 2

There are non-protein amino acids found in all organisms but how many are found in proteins?

Answer 2

20

Question 3

What 4 things are bound to the central chiral carbon of an amino acid?

Answer 3

Amine group, carboxyl group, H atom and R group

Question 4

Amino acids can exist as dipolar ions where the amino group is protonated and the carboxyl group is de-protonated, what are these called?

Answer 4

Zwitterions

Question 5

At what type of pH are zwitterions present?

Answer 5

Physiological/neutral pH

Question 6

What are the two isomers called that make up the pair of enantiomers of aas? (different shape but are mirror images)

Answer 6

L and D isomers

Question 7

Which out of L+D isomers are found in proteins?

Answer 7

L

Question 8

What two things can’t the D-isomer do?

Answer 8

Be digested or interact with the tRNA

Question 9

What is the unit of mass and length for proteins?

Answer 9

Daltons = mass, Angstrom = A

Question 10

One dalton is is equivalent to the molecular weight of…

Answer 10

1 H atom

Question 11

One Angstrom is equivalent to how many metres and nanometres?

Answer 11

1^-10m and 0.1nm