Proteins Flashcards

1
Q

What are proteins made up of

A

Amino acids

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2
Q

What are amino acids consisted of

A

Carboxyl group, R group and amino group

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3
Q

What are amino acids joined by

A

peptide bonds (condensation reactions)

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4
Q

What are the four structures

A

Primary, secondary , tertiary and quaternary

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5
Q

What is the primary structure

A

the sequence of amino acids in a protein

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6
Q

What is secondary structure

A

2D arrangement of chain of amino acids either alpha helix or b pleated sheets.

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7
Q

What is tertiary structure

A

3D folding of ionic complex shape consists of
hydrogen bonding,
ionic bonds ( salt bridges between oppositely charged groups on r group )
disulphide bridges ( covalent bonds between sulphur atoms in cysteine)

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8
Q

What is quaternary structure

A

3D arrangement of more than one polypeptide

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9
Q

describe fibrous and globular in terms of type of structures

A

little to no tertiary structure and in globular consist of all

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10
Q

describe how r group is portrayed in globular and fibrous

A

in globular the hydrophilic r groups orientate outwards meaning they’re soluble and transported in blood

in fibrous the hydrophobic r groups are on the inside so insoluble

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11
Q

which proteins are functional and structural

A

globular are functional fibrous is structural

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12
Q

describe the chains in fibrous

A

long parallel polypeptides strands they have cross links which enable tensile strength for stability.

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13
Q

what type of protein is collagen

A

a fibrous protein

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14
Q

why does collagen have high tensile strength

A

because of the presence of hydrogen boding and covalent bonding

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15
Q

what is collagen made up of

A

3 chains / polypeptides wrapped around to form an alpha triple helix which is known as collagen fibrils which makes fibres

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16
Q

what does collagen do

A

forms structure of bones and tendons

17
Q

what type of protein is haemoglobin

A

a soluble globular protein