B2 Proteins Flashcards

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1
Q

Name the monomer shown in the diagram

A

Amino acid

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2
Q

Name the elements found in an amino acids

A

Carbon

Hydrogen

Oxygen

Nitrogen

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3
Q

Name the bond formed between two amino acids

A

Peptide bond

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4
Q

Name the type of reaction used to break a peptide bond

A

Hydrolysis

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5
Q

Name the level of protein structure shown in the diagram

A

Primary structure

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6
Q

Define primary structure of proteins

A

Specific sequence of amino acids joined by peptide bonds

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7
Q

Name the type of reaction used to join two amino acids together

A

Condensation reaction

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8
Q

How is this sectondary strucutre held in place?

A

Hydrogen bonds

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9
Q

Name the type of secondary structure shown on the diagram

A

Alpha helix

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10
Q

Name the type of secondary structure shown on the diagram

A

Beta pleated sheet

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11
Q

Give a defintion of secondary structure

A

Specific folding of the promary structure held in place by hyudrogen bonds

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12
Q

Give a definition of tertiary structure

A

Specific folding of the secondary structure held in place by hydrogen, ionic and disulfide bonds

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13
Q

Name a protein that has a tertiary structure

A

Enzyme

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14
Q

Name a protein that has a quaternary structure

A

Haemoglobin

Antibody

Chlorophyll

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15
Q

Give a definition of a quaternary structure

A

Protein made of two or more polypeptides

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16
Q

What is a disulfide bridge?

A

A bond between 2 supfur atoms

17
Q

Which amino acid contains supfur?

A

Cysteine

18
Q

Name the three parts of an amino acid

A

NH3 - amine group

COOH - carboxyl group

R group - variable side chain

19
Q

Describe how a dipeptode is formed

A

Condensation reation

Form a peptide bond between 2 amino acids

Hydrogen removed from NH3 group

Hydroxyl group removed from the carboxyl group

20
Q

What is a polypeptide?

A

Mnay amino acids joined together by peptide bonds

21
Q

Describe a biochemcial test for a protein

A

Biuret test

Add Biruet solution

Positive result - lilac

Negaive result - blue

22
Q

Nmae the organelle responsible for joining maino acids together

A

Ribosome