BIOC192 Lecture 3 - Introduction to proteins

Question 1

what are protein polymers made of?

Answer 1

non-branching polymer composed of a unique sequence of amino acids joined by a peptide bond

Question 2

how many standard amino acids are there?

Answer 2

20 amino acids

Question 3

what is the name of the bond that links amino acids in the polypeptide chain?

Answer 3

amino acids are joined by peptide bonds

Question 4

does each protein have an unique sequence of amino acids? And why?

Answer 4

yes, each protein does have a unique sequence of amino acids that determine different functions however all proteins are composed of the same amino acids

Question 5

why is it important to know and understand protein structure?

Answer 5

it is important because the structure of a protein determines its function

Question 6

what are the 3 main techniques that are used to determine protein structure?

Answer 6

1) protein crystallography
2) electron cryo-microscopy
3) NMR spectroscopy

Question 7

name a protein involved in DNA replication

Answer 7

DNA polymerase

Question 8

name a protein involved in RNA replication

Answer 8

RNA polymerase

Question 9

name a protein involved in oxygen transport

Answer 9

haemoglobin

Question 10

name a protein involved in immune protection

Answer 10

anitbodies

Question 11

name a protein involved in digestion

Answer 11

trypsin

Question 12

name a protein involved in metabolism

Answer 12

alcohol dehydrogenase

Question 13

what is a protease

Answer 13

an enzyme that breaks down proteins

Question 14

suffix for an enzyme

Answer 14

ase