Histidine Catabolism to Oxoglutarate
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Science, Chemistry
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University
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Hard
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7 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the primary enzyme involved in the initial catabolism of histidine?
Dioxygenase
Glutamate dehydrogenase
Histidine ammonia lyase
Urocanic hydratase
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Why is urocanic acid important in the epidermis?
It provides structural support
It acts as a moisturizer
It absorbs ultraviolet light
It enhances pigmentation
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which enzyme catalyzes the hydration of urocanic acid?
Glutamate dehydrogenase
Imidazolone propionase
Urocanic hydratase
Histidine ammonia lyase
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the significance of tautomerization in the conversion of urocanic acid?
It increases solubility
It enhances UV absorption
It allows nucleophilic acyl substitution
It stabilizes the molecule
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the final product of histidine catabolism?
Urocanic acid
Formimino glutamate
Glutamate
Alpha-ketoglutarate
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How is histidine classified based on its catabolic pathway?
Both ketogenic and glucogenic
Neither ketogenic nor glucogenic
Glucogenic
Ketogenic
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which cycle does alpha-ketoglutarate enter after being formed from histidine catabolism?
Pentose phosphate pathway
Urea cycle
Glycolysis
TCA cycle
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