Structure of proteins Flashcards

Module 3

1
Q

What is the primary structure

A

amino acid sequence

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2
Q

what determines the properties of the protein

A

primary structure

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3
Q

what is the secondary structure

A

the folds such as helix and sheets

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4
Q

the function of a protein is determined by

A

3D structure

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5
Q

what is the tertiary structure

A

3D unique structure

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6
Q

what is quarternary structure

A

several units combine to form a protein with several polypeptide chains

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7
Q

Alpha helices are formed when

A

when the polypeptide strand folds around a central axis forming a regular, repeating helical structure

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8
Q

describe each repeating unit for the alpha helices include a) how many turns b) how long is the extension c)how many residues

A

a) single turn
b) 5.4 A along the axis
c) 3.6 residues

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9
Q

Is the helical twist of alpha helices in proteins left handed or right?

A

Right

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