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Question
Which amino acids are metabolized mostly in skeletal muscles?a. those with side chains containing aromatic rings
b. those with side chains that are branched
c. those with side chains containing basic groups
d. those with side chains containing sulfur atoms
Answer
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Related questions
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a. blood urea nitrogen.
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a. ascending loop of Henle
b. distal convoluted tubule
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Which hormone, mediated by the enzyme renin, is primarily responsible for active reabsorption of sodium ions in the distal and collecting tubules?
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a. intracellular
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Why are vitamins A and E said to be antagonists of vitamin K?
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Although for micronutrients increasing the amount of a protein by directly inducing gene expression is certainly a common mechanism, we have encountered other mechanisms by which vitamins can regulate proteins. Provide one example of posttranslational modification, being as specific as possible.
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The active form of vitamin A that regulates cell differentiation through gene expression is _____.
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The 2 forms of naturally occurring provitamin D are: _____ and _____.
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Which fat-soluble vitamin appears to operate as a coenzyme that modifies proteins to bind with calcium?a. Ab. -carotenec. Ed. K
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For which vitamin is the Tolerable Upper Intake Level set because of increased tendency for bleeding?
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A genetic deficiency in _____ leads to a vitamin E deficiency syndrome.
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b. McCollum and Davis
c. Mellanby and Hopkins
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Q:
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a. circulating 25-OH cholecalciferol
b. circulating 1,25-OH2 cholecalciferol
c. circulating cholecalciferol
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Q:
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b. the evidence is only in animals, not humans.
c. some evidence suggests a protective effect of vitamin D.
d. take a supplement containing 2000 IU vitamin D each day.
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a. neurological function
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Q:
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a. lost 2 electrons
b. lost 1 electron
c. gained 2 electrons
d. gained 1 electron
Q:
Nutrients can be used to compensate for some gaps in our DNA. For example:a. Individuals with a change in the base sequence for the phenylalanine hydroxylase gene can correct the sequence of bases by eating a lot of phenylalanine.b. Obese individuals can lose body weight by eating fewer calories than they expend.c. Omega-3 fatty acids can up-regulate genes encoding for fat oxidation.d. Individuals with a polymorphism that decreases activity of a folate-metabolizing enzyme, methylene tetrahydrofolate reductase, may have more elevated plasma homocysteine than those with a normal enzyme while more folate intake can normalize plasma homocysteine for those with this polymorphism.