proteins

Question 1

what are the monomers of proteins?

Answer 1

amino acids

Question 2

what is formed when 2 amino acids join?

Answer 2

a dipeptide

Question 3

what is formed when more than 2 amino acids join?

Answer 3

polypeptide

Question 4

what are 2 types of proteins?

Answer 4

fibrous, vital for structure
globular, metabolic functions

Question 5

what are proteins made up of?

Answer 5

one or more polypeptide

Question 6

what is the general structure of an amino acid?

Answer 6

an amine group, an r group, hydrogen atom and carboxylic acid
H R O
N-C-C
H H OH

Question 7

how do 2 amino acids join together?

Answer 7

a condensation reaction, the OH from one carboxylic acid and a H from the amine group are removed to produce a water molecule and a peptide bond is formed to bond the two amino acids

Question 8

what is the bond formed between 2 amino acids

Answer 8

peptide

Question 9

what is an amino acid made up of?

Answer 9

Made up of a central carbon atom bonded to a hydrogen atom, a R group, a carboxyl group and an amine group.

Question 10

what is a dipeptide?

Answer 10

A molecule formed by the condensation of two proteins.

Question 10

what is a polypeptide?

Answer 10

a polymer formed by the condensation of many amino acids.

Question 11

describe the test for proteins

Answer 11

add sodium hydroxide solution to ensure the test solution is alkaline
add biuret or copper sulphate solution
if protein is present, solution will turn purple/lilac, if not, solution will remain blue