what are the genetic defects in urea cycle?
A blockage of carbamoyl phosphate synthesis or any of the 4
steps of urea cycle has serious consequences because there
is no alternate pathway for synthesis of urea.
They all lead to an elevated level of NH4 ion in blood
(HYPER AMMONEMIA)SOME OF GENETIC DEFECTS BECOME EVIDENT
AFTER A DAY OR TWO AFTER BIRTH.
infant becomes lethargic and becomes periodically.
High levels of NH4 ion are toxic because elevated levels of
glutamine lead directly to brain damage.
alpha -ketoglutarate-.glutamate->glutamine
people cannot tolerate protein rich diet because aminoacids
ingested in excess would be deaminated in liver producing
free ammonia in blood which is toxic to humans.
people with defects in urea cycle treated by substituting
in diet alpha-keto acid analogues of essential aminoacids.
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Explain how can you determine the reaction, taking place at constant pressure delta (h)?
Why fe3+ ion is more stable than fe2+ ion is?
How do you call the geometrical isomerism, similar groups are present on same side?
The nucleophile in the first stage of the serine protease mechanism is a) H2O b) the carboxyl of Asp 102 c) the hydroxyl of Ser 195 d) the imidazole of His 57
"wobble" hypothesis means?
What is dipole?
All technical,written test questions
Which branch of science deals with the transformation of chemical energy into electrical energy and vice versa?
Which are the nucleotides “portions” that bind in the formation of nucleic acids?
What is meant by substrates of enzymatic reactions?
What is the enzyme that catalyzes the production of rna?
DNA binding by proteins with the helix-turn-helix (HTH) motif does not involve a) altered stacking of the DNA at the center of symmetry. b) hydrogen bonds, salt bridges, and van der Waals contacts. c) interactions with base pairs in the major groove of DNA. d) interactions with the sugar-phosphate backbone of DNA.