C2 p3 slides Proteins Flashcards Preview

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Flashcards in C2 p3 slides Proteins Deck (28):
1

Proteins are polymers of ?

Amino acids

2

short amino acid chains are called

peptides

3

Total basic and modified amino acids

150

4

Proteins made on ribosomes contain only ?-amino acids

L

5

In solution, amino acids are ?, meaning they have both positive and negative charges

zwitterions

6

The chiral carbon i an amino acid is called an ?

alpha carbon

7

The amino group of an amino acid is protonated or unprotonated at neutral ph

protonated (99%)

8

The carboxyl group of an amino acid is protonated or unprotonated at neutral ph

unprotonated (99.999%)

9

pk2 of amino acid (amino group)

9.6

10

pk1 of amino acid (carboxyl group)

2.3

11

Tryptophan is polar or nonpolar

nonpolar

12

glycine is unique in that ?

it's side chain only consists of hydrogen

13

Glycine is technically hydrophobic or hydrophillic

hydrophobic

14

glycine often resides where ?

two polypeptides come in close contact

15

Amino acid that can fit into either hydrophobic or hydrophilic region

glycine

16

amino acid acid side chain with pka closest to physiological ph

histidine

17

With which group would cysteine fall into if it did not have a special characteristic

uncharged, polar

18

forms disulfide bond with another one of it's molecules

cysteine

19

Proline would fall into this group if it did not have a special character

nonpolar

20

amino acid that creates kinks in polypeptide chain

proline

21

bond between amino acids

peptide bond

22

a peptide bond is a form of ? bond

amide

23

This bond has characteristics of a double bond

peptide

24

Nucleotides are joined together by ?

phosphodiester linkage

25

Three major functions of nucleotides

carry chemical energy, can combine with other molecules to form coenzymes, signalling molecules

26

nucleoside

sugar + base

27

phosphates of ATP connected by ?

phosphoanhydride bonds

28

Biological molecules are put together with ? reactions

condensation