Bio Molecules

Question 1

What is the primary structure of a protein

Answer 1

The order of amino acids in a polypeptide chain

Question 2

What is the secondary structure of a protein

Answer 2

The shape the polypeptide chain forms as a result of hydrogen bonding along the chain

Question 3

What is the tertiary structure of a protein

Answer 3

The bonds that maintain the 3d structure of the molecule

Question 4

What is the quaternary structure of a protein

Answer 4

2 or more polypeptide chains combining to form a complex

Question 5

How does a peptide bond form

Answer 5

Amino group on one amino acid reacts with the carboxyl group of amino acid and elimates water

Question 6

how are lipids different to carbohydrates

Answer 6

contain more oxygen
dissolve in organic solvents
insoluble in water

Question 7

what is a triglyceride and what are the functions

Answer 7

1 glyceride and 3 fatty acids joined by an ester bond through a condensation reaction
energy reserves - in bonds
thermal insulation
protection of organs -fats

Question 8

what is a phospholipid and what are the functions

Answer 8

hydrophillic phosphate head and 2 hydrophobic fatty acid tails
structure in biological membranes
electrical insulation-myelin sheath surrounding axon of nerve cells

Question 9

Is a molecule with only single carbon bonds saturated or unsaturated

Answer 9

saturated

Question 10

why are unsaturated molecules liquid at room temp

Answer 10

the chain gets a kink , molecules cannot align and solidify