Proteins Flashcards

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1
Q

What is an R group?

A

A functional group

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2
Q

How many naturally occurring amino acids are there?

A

20

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3
Q

What bond is formed by a condensation reaction between amino acids?

A

Peptide

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4
Q

What is primary protein structure and what bonds does it contain?

A

sequence of amino acids linked by peptide bonds

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5
Q

What is secondary protein structure and what bonds does it contain?

A

folding of primary structure into an alpha helix or a beta pleated sheet, held by hydrogen bonds

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6
Q

What is tertiary protein structure and what bonds does it contain?

A

further folding into a complex 3D structure, held by disulphide, ionic, hydrogen and hydrophobic bonds between -R groups

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7
Q

What is quaternary protein structure and what bonds does it contain?

A

two or more polypeptide chains in tertiary form bonded together, held by disulphide, ionic, hydrogen and hydrophobic bonds between -R groups

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8
Q

Are enzymes, antibodies and hormones globular or fibrous?

A

globular, as they must be soluble

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9
Q

Name a fibrous protein

A

Collagen, keratin

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