Lesson 5- Proteins (pr-)

Question 1

Function

Answer 1

Structural functions, enzymes, aid in the transport of substances, chemical messengers (hormones)

Question 2

Structure

Answer 2

amino acids joined together in chains called polypeptides

Question 3

Amino acids

Answer 3

Carbon middle, amino group, carboxyl group, and r side chain. can be polar, non-polar, or electrically charged. bond together through a condensation reaction

Question 4

Protein structure

Answer 4

complex-shaped based on the order amino acids are joined together. Primary, secondary, tertiary, and quaternary structures. a change in the shape is called denaturation and loses the ability to function

Question 5

Primary structure

Answer 5

the order of the amino acids in a polypeptide (20 amino acids so many different variations)

Question 6

Secondary structure

Answer 6

local folding of the polypeptide, hydrogen. bonds between amino acid backbones, a-helix and b-pleated sheet

Question 7

Tertiary structure

Answer 7

the folding of secondary stuctures in polypeptide chain upon themselves, results in interactions between side chains (ionic, hydrogen, hydrophobic interactions, disulfide bridges)

Question 8

Quaternary structure

Answer 8

when two or more polypeptide chains combine to forma. single pr- molecule, results in interactions between side chains