proteins

Question 1

what are the three different groups in protiens

Answer 1

amino group
r group
carboxylic group

Question 2

what is the ‘r’ group of an amino acid

Answer 2

defines the amino acid changes depending on the specific amino acid

Question 3

what can two or more amino acids join to form

Answer 3

a dipeptide

Question 4

how is a dipeptide formed

Answer 4

in a condensation reaction - the removal of water
OH- from carboxyl group with a -H from the amino group lnked by a peptide bond

Question 5

when one or more amino acids are added to a di-peptide what is formed

Answer 5

a polypeptide

Question 6

what happens in the primary structure of proteins

Answer 6

polymerization occurs resulting in a polypeptide
it is the sequance of polypeptides that determines the shape of the protien

Question 7

what is the secondary structure

Answer 7

polypeptide folded into a-helix

Question 8

how does the polypetide become an a-helix?

Answer 8

bonds are fomed
hydrogen bonds are fomes in all levels of the structure
ionic bonds between carboxyl and amino groups
disulfide bonds are formed between two cysteine amino acids

Question 9

what are the three types of bonds in the tertiary structure

Answer 9

hydrogen bonds
ionic
disulfice bonds

Question 10

what are the disulfide bonds between

Answer 10

two cystenine amino acids

Question 11

what are the ionic bonds between

Answer 11

carboxyl and amino groups

Question 12

what happens in the quaternary structure

Answer 12

a number of different polypeptide cahins and other groups form to make a large protien molecule

Question 13

give an example

Answer 13

heamoglobin

Question 14

what is a globular protien

Answer 14

protiens with a spherical shape caused by tightly folded polypeptide chains

Question 15

give an example

Answer 15

heamoglobin