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Home Ec > Protein > Flashcards

Protein Flashcards

1
Q

What is the NH2

A

Amino acid

Basic

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2
Q

What is the COOH

A

Carboxyl group

Acidic

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3
Q

Name two examples of amino acids and their variable

A

Glycine=H

Cysteine=HS-CH2

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4
Q

What amino acids can be

a) Manufactured by the body
b) obtained from food

A

a) non essential

b) essential

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5
Q

How many essential amino acids do
Adults need
Children need

A

8
10

(CHILDREN) Histidine
(CHILDREN) Arginine
(BOTH) Valine

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6
Q

How many non essential amino acids are there an name two

A

10
Alanine
Proline

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7
Q 
How many bonds does \_\_\_\_\_ have 
Hydrogen 
Oxygen 
Nitrogen 
Carbon
A 
1 
2
3
4
 HONC
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8
Q

How many peptides make a poly peptide

A

20

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9
Q

How many peptides make a protein

A

50

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10
Q

How many poly peptides are in a chain for the primary structure of a protein

A

20

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11
Q

How is a secondary structure formed

A

The folding of a primary structure into definite shapes

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12
Q

Name two cross link bonds

A

Disulfide bind

Hydrogen bond

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13
Q

What is a disulfide bond

A

When two sulfures from two amino avduees form either a single polypeptide or two different polypeptide chains

Eg cysteine

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14
Q

What is a hydrogen bond

A

When a hydrogen from the NH group of one Amin acid and an oxygen from the C=O group of another ami o acid join together to make a single polypeptide chain or two different polypeptide chains

Eg collagen

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15
Q

What is a tertiary structure

A

The folding of secondary structure proteins into 3D shapes

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16
Q

What are the names of the tertiary structures

A

Fibrous - arranged, straight, zigzag

Globular- spheric shape

17
Q

What are properties of fibrous and globular

A

F
Insoluble in water
Not easily denatured
Eg gluten

G
Soluble
Easily denatured
Eg ovalbumin

18
Q

Name the plant subgroups examples and sources of properties

A

Glutenins- glutenin wheat

Prolamines - zein - wheat

19
Q

Name an example of a lipoprotein

A

Lecithin

20
Q

Name an example of a phosphoprotein

A

Caseiniogen

21
Q

What proteins are in soya beans

A

Glycinin

22
Q

What proteins are in meat bone

A

Gelatine

23
Q

What is the Maillard reaction

A

Non enzymic browning of food due to the reaction between two amino aides and sugars under dry heat

24
Q

What is the energy value of protein

A

1g prot = 4kcal energy

25
Q

What transports amino acids to the liven

A

Hepatic portal vein

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