PROTEINS

Question 1

Proteins contain ….

Answer 1

Carbon Hydrogen Oxygen and Nitrogen sometimes sultry and phosphorus

Question 2

Proteins-

Answer 2

Polymers made of amino acids

Question 3

Amino acid structure

Answer 3

Amino group carboxyl Group hydrogen atom and The R groups

Question 4

The order of amino acids

Answer 4

Determines its structure and shape

Question 5

At Ph 7

Answer 5

The amino group is basic

Question 6

At Ph 7 the carboxyl group is

Answer 6

Acidic and loses a Hydrogen atom becoming negatively charges

Question 7

Zwitterion

Answer 7

A molecule or ion having separate positively charged and negatively charged groups

Question 8

Protein form in a …

Answer 8

Condensation reaction to form a peptide bond

Question 9

Amino acid + Amino acid

Answer 9

= Dipeptide + Water

Question 10

Protein Functions

Answer 10

• Biological catalysts
  -Hormones
  -Hormones
  -structure-Muscle

Question 11

Primary structure …

Answer 11

Sequence of Amino acids in a protein

Question 12

Polypeptides are

Answer 12

The chains of Amino acids

Question 13

Secondary structure

Answer 13

The shape the polypeptide chain forms as a result of hydrogen bonding . Where the polypeptides coils up or folds up and held together to form hydrogen bonds .Alpha helix and beta pleated sheet

Question 14

Roles of Amino acids

Answer 14

-Transport nutrients
-prevent illnesses

Question 15

Tertiary structure

Answer 15

3D Shape of the protein that can form due to the folding and coiling of protein structure .
-Hydrogen bonds
-ionic bonds
-Disulphide bridges
-Hydrophobic interactions

Question 16

Quaternary structure

Answer 16

A more folded 3d structure of polypeptide chains that contain
-Hydrogen Bonds
-ionic Bonds
- hydrophilic interactions on the outside and hydrophobic interactions on the inside

Question 17

The role of a protein depends on

Answer 17

Their structure and shape

Question 18

Hydrophobic

Answer 18

HATES WATER PHOBIA

Question 19

hydrophilic

Answer 19

WATER LOVING

Question 20

Globular properties

Answer 20

-spherical globe shape
- soluble in water
-Metabolic roles
-Compact and folded into spherical molecules making them soluble in water

Question 21

Example of a Globular structure

Answer 21

Haemoglobin enzymes

Question 22

Fibrous protein

Answer 22

3d tertiary and quaternary structure of proteins that forms fibres

Question 23

Properties of fibrous proteins

Answer 23

-long polypeptide chains
-have structural roles in the body
-the polypeptide chains are able to form long fibres due to the cross linkages of polypeptides
Insoluble in water so have structural functions
Strong and tough

Question 24

Examples of fibrous protein

Answer 24

Collagen, Keratin,

Question 25

Collagen

Answer 25

• collagen is a fiborous protein
• huge strentght due to hydrogen and covalent bonds
• collagen molecules wrap around eachother to form fibrils forms alpha helix
• ## forms the structure of bones,connective tissue and tendons

Question 26

Haemoglobin

Answer 26

• water soluble globular rotein
• consists of two beta olyetide chains and a haem group
• carries oxygen in the blood