proteins Flashcards

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1
Q

what is the monomer of a protein?

A

amino acids

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2
Q

what is a dipeptide?

A

2 amino acids joined together

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3
Q

what is a protein?

A

one or more polypeptides

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3
Q

what is a polypeptide?

A

more than 2 amino acids joined together

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4
Q

what is the structure of an amino acid?

A

amino group (H2N)
hydrogen
variable group (R)
carboxyl group (COOH)
carbon in centre

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5
Q

what is the primary structure of a protein?

A

sequence of amino acids

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6
Q

what is the secondary structure of a protein?

A

hydrogen bonds form between amino acids so they coil to an alpha helix r fold to a beta pleated sheet

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7
Q

what is the tertiary structure of a protein?

A

coils or fold further
hydrogen and ionic bonds form
disulfide bridges form

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8
Q

what is the quaternary structure of a protein?

A

how multiple polypeptide chains are assembled together

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9
Q

what is the biuret test?

A

add sodium hydroxide solution
add copper sulfate solution
positive = purple

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