Proteins Flashcards

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1
Q

What monomers are proteins made from?

A

Amino acids

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2
Q

Draw the general structure for an amino acid:

A

Amino acid with H group, carboxyl group, amino group and R group

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3
Q

What reaction between 2 amino acids forms what type of bond?

A

A condensation reaction forms a peptide bond between 2 amino acids creating a dipeptide.

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4
Q

How are polypeptides formed?

A

The condensation of many amino acids.

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5
Q

What might a functional protein contain?

A

One or more polypeptides

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6
Q

What is the primary structure of a protein? And which bond maintains it?

A

The number, type and order of amino acids in a polypeptide chain. Maintained by peptide bonds.

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7
Q

What is the secondary structure of a protein? And which bond maintains it?

A

The bending and folding of a polypeptide chain into an alpha-helix or beta-pleated sheet. Maintained by hydrogen bonds.

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8
Q

What is the tertiary structure of a protein? And which bonds maintain it?

A

The bending and folding of a polypeptide chain to give a unique globular or fibrous shape. Maintained by hydrogen, ionic and disulfide bonds.

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9
Q

What is the quaternary structure of a protein? And which bonds maintain it?

A

The joining of 2 or more polypeptide chains and other groups to form the final protein. Maintained by hydrogen, ionic and disulfide bonds.

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10
Q

What dictates tertiary structure?

A

Primary structure

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11
Q

What dictates an enzyme’s active site?

A

Tertiary structure

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12
Q

How do you conduct the Bieuret test for proteins?

A
  1. Add a few drops of NaOH to sample
  2. Add Copper Sulfate solution
  3. If protein present, turns purple.
  4. No protein = blue.
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13
Q

How does haemoglobin’s shape determine it’s function?

A

Compact, soluble protein which makes it easy to transport and carry oxygen around the body.

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14
Q

How does collagen’s shape determine it’s function?

A

Has 3 polypeptide chains tightly coiled together to make it strong.

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