Exam (elaborations)
Biochemistry Irene Gold Boards Pt 1
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Biochemistry Irene Gold Boards Pt 1
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Biochemistry Irene Gold Boards Pt 1All amino acids exist in the L-form except ___________ - -Glycine
-Why does Glycine not exist in the L-form? - -does not contain a chiral
carbon
-All AA are ___________ - -Amphoteric- Act as an acid or base
-What part of the molecule determines amino acid function? - -R group/side
chain
-What aa is essential for only children or in pregnancy? - -Histidine
-What are essential amino acids? - -PVT TIM HALL
Phenylalanine
Valine
Threonine
Tryptophan
Isoleucine
Methionine
Histidine
Arginine
Leucine
Lysine
-What are the ketogenic amino acids? "Lucy lies to get the keys" - -leucine
and lysine
-What is the precursor to carnitine - -Lysine
-What are the aromatic amino acids? "Tyrone will Tryp your Pal in the ring" -
-phenylalanine, tyrosine, tryptophan
-What are the sulfur containing amino acids? "To be an MC, you have to
have Soul" - -cysteine, methionine, cystine
-What makes up a cystine? - -2 cysteines linked together
-What kind of bond makes up a Cystine? - -Disulfide
-What are the branched amino acids? - -leucine, isoleucine, valine
, -What is maple syrup disease? - -cannot break down branches amino acids
-What are the acidic amino acids? "A CIty of ASs and GLUTEs" - -aspartic
acid, glutamic acid
-What does aspartame contain? - -aspartic acid
-What is the problem with excess of aspartame? - -Neurotoxicity
-What are the basic amino acids? "HAL lives on BASE" - -HAL
1) Histidine
2) Arginine
3) Lysine
-What is the limiting amino acid in wheat? "Nutritionists LYE about the
benefits of wheat and rice" - -Lysine
-What is the limiting amino acid in Legumes? "Don't TRYP on your LEG" - -
Tryptophan
-What are the limiting amino acids for maize? "A MAZE will LIE and TRYP
your mind" - -Lysine and tryptophan
-What are the limiting amino acids in pulses? Pulse=ION gun - -Methionine
(or cysteine)
-What is the limiting amino acid in eggs and chicken? "Which came first?
The chicken or the egg?? - -NONE
-What is the precursor of tyrosine? - -Phenylalanine
-What is the pathology when someone has a deficiency of phenylalanine
hydroxylase? - -Phenylketonuria (PKU)
-What is the precursor to dopamine? - -L-dopa
-What is the precursor to Norepinephrine? - -dopamine
-What is the precursor to serotonin and melatonin? - -Tryptophan
-What is the essential AA that is a precursor to nitric oxide and Creatine? - -
Arginine
-What non essential AA is a precursor to the manufacturing of thyroxine
(T4)? - -Tyrosine
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