proteins Flashcards Preview

YEAR 1 BIO > proteins > Flashcards

Flashcards in proteins Deck (22)
Loading flashcards...
1

what are proteins made of

amino acids

2

how many amino acids do we need and how do we get all of them

20we eat nine of them daily and from those 9 we can make the other 11

3

what is a ZWITTERION

no overall charge but separate parts which are + and - acids donate protons and bases accept them

4

what is a dipeptide

to proteins which form a peptide bond between the nitrogen and carbon atoms and H2O is formed in the process

5

what is the primary sequence in proteins

sequence of amino acids in a protein

6

what is the secondary structure in proteins

hydrogen bonds between amine and carboxylic acids to form an alpha helix or beta pleated sheets dependant on the stregth of the bond

7

what is the tertiary structure of proteins

bonds between the R groups in polypeptides

8

what bonds do sulphur containing R groups form and give examples

disulphide bridges between cysteine and methionine

9

positive and negative charged R groups from......

ionic bonds

10

where are hydrophobic R groups and how do they interact

in centre of protein and have hydrophobic interactions

11

wat bonds do R groups form with other R groups OR water molecules

hydrogen bonds

12

what is the quaternary structure of proteins

some proteins consist of more than one polypeptide held in a 3D structure

13

what are the chains in quaternary structures held by

the same bonds as tertiary structures

14

what are groups do quaternary structures involve

non amino acid groups called prosthetic groups

15

give examples of prosthetic groups

metal ions, sugar vitamins and methyl groups

16

what are globular proteins and give properties

a roughly spherical shaped protein soluble

17

what type of protein are enzymes

globular

18

give an example of a globular protein

haemoglobin4 polypeptides - 2 alpha 2 beta chain subunits4 harm groups containing iron

19

what is a fibrous protein and give properties

llong chains of fibre structures containing all 4 structures

20

give an example of a fibrous protein

collagen found in skin teeth bones blood vessel wallsfibres form a triple helix bonded by hydrogen bonds

21

how can you test for proteins

2cm^3 of solution with 2cm^3 of biuret solution cover and invertif it turns purple it is positive for protein

22

uses of water

hydrolisiscondensation reaction thermoregulation transport