protein structure (1)

Question 1

R group

Answer 1

varies in numbers

Question 2

how many different amino acids are there

Answer 2

20

Question 3

peptide bonds

Answer 3

formed when the carboxyl group of 1 amino acid reacts with amino group of another via condensation

Question 4

primary structure

Answer 4

sequence of amino acids which forms polypeptide chain

Question 5

secondary structure

Answer 5

formed due to formation of hydrogen bonds and forms beta pleated sheets

Question 6

Alpha helix

Answer 6

hydrogen bonds form between every 4th peptide bond

Question 7

Beta pleated sheets

Answer 7

hydrogen bonds form between parallel peptide bond regions

Question 8

Describe how the structure of a protein depends on the amino acids it
contains

Answer 8

Structure is determined by R group
2. Primary structure is sequence of amino acids;
3. Secondary structure formed by hydrogen bonding
4. Tertiary structure formed by interactions
6. Quaternary structure contains >1 polypeptide chain

Question 9

Describe how a peptide bond is formed between two amino acids to form a
dipeptide

Answer 9

Condensation (reaction)
2. Between amine