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Use the following to answer questions Choose the correct answer from the list below. Not all of the answers will be used. -The class of enzymes that cleaves most aromatic rings in biological systems is _____________.


A) hyperammonemia
B) aminotransferases
C) methionine
D) S-adenosylmethionine
E) glutamate dehydrogenase
F) oxaloacetate
G) biopterin
H) glutamate
I) hippurate
J) urea
K) dehydratase
L) dioxygenases
M) ammonia disorder

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Biopterin is a complicated coenzyme required for the conversion of phenylalanine to tyrosine. Why is biopterin not considered a vitamin?

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Because it is synthe...

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Which amino acids can be directly deaminated to produce NH4+?


A) serine and threonine
B) serine, asparagine, and threonine
C) proline and threonine
D) serine and valine
E) None of the above.

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What general feature is involved in the degration of aromatic amino acids?

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The cleavage of arom...

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Serine dehydratase catalyzes the conversion of serine into NH4+ and ___________________.

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What is the basic strategy by which proteins are degraded?

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Proteins are degraded to amino acids and...

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The urea cycle is:


A) a system for protein degradation and turnover.
B) responsible for nitrogen fixing.
C) responsible for the filtering of nitrogen by the kidney.
D) a system involved in transporting nitrogen from muscle to the liver.
E) None of the above.

Correct Answer

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