MCQ 1 questions

Question 1

what are the aromatic amino acids

Answer 1

tryptophan, phenylalanine, tyrosine

Question 2

which amino acids have a neg charge

Answer 2

aspartate and glutamate

Question 3

note the features of the peptide bond

Answer 3

planar, polar, rigid, limited rotation

Question 4

note the key features of the zwitterion

Answer 4

neutral charge, can be protonated or unprotonated

Question 5

what are the functions of chaperones

Answer 5

help protein folding/protects from denaturing/correction of misfolding

Question 6

what are the differences between fibrous and globular proteins

Answer 6

fibrous proteins are insoluble in water, weak acids + bases. globular proteins are soluble in water acids and bases

Question 8

how to tell if a glycoprotein is n or o linked

Answer 8

if the protein is attached to a NH2 the structure is n linked

o linked - serine/threonine
n linked - argenine

Question 9

what is melting point and what governs it

Answer 9

decreases as the chain length decreases and decreases as the number of double bonds INCREASE

Question 10

what is a sphingolipid

Answer 10

lipid with a backbone of long chain amino alcohol sphingosine where a fatty acid is joined via amide linkage

Question 11

which dietary lipids are good for us

Answer 11

unsaturated fats - both poly and mono unsaturated

Question 12

which fats are bad for us

Answer 12

saturated fats (veg and animal) and trans fats (modified fatty acids- typically satuated)