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BLOCK F: LESSONS 29, 30 & 31

gyorgycrack 13 Fragen

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  1. 1What of the next statements is not true about pepsinogen?
    1. APepsinogen is a zymogen
    2. BThe active form of pepsinogen is called pepsin
    3. CPepsinogen is transformed into pepsin in a basic medium
    4. DPepsin breaks the peptide bonds of proteins, so makes the proteins smaller
    5. EPepsin is not the only proenzyme present in the intestine
  2. 2For example, if we eat a protein from a vegetable, it will be [blank_start]denatured[blank_end] due to the low pH, and then [blank_start]pepsin[blank_end] will act and will divide it in small fragments as dipeptides and peptides, that will release [blank_start]amino acids[blank_end], which are going to be captured by the [blank_start]enterocytes[blank_end], and will be secreted into [blank_start]blood[blank_end].
    1. Adenatured
    2. Bpepsin
    3. Camino acids
    4. Denterocytes
    5. Eblood
  3. 3The AA digested can be used for the synthesis of non-proteic AA, synthesis of nitrogenous bases, synthesis of the heme group, synthesis of some neurotransmitters and synthesis of hormones and this is called the protein feedback
    1. ARichtig
    2. BFalsch
  4. 4During desamination we will get one α-ketoacid and one amino acid.
    1. ARichtig
    2. BFalsch
  5. 5Pyruvate and oxaloacetate are α-ketoacids
    1. ARichtig
    2. BFalsch
  6. 6If glutamic acid is digested, what will probably happen?
    1. AIt will react with pyruvate and Alanine will be obtained
    2. BIt will react with oxaloacetate and Aspartic acid will be obtained
    3. CIt will react with α-ketoglutamine and Proline will be obtained
    4. DIt will suffer a desamination and will form α-ketoglutarate
    5. EIt will suffer a desamination and will form one pyruvate
  7. 7Glutamate dehydrogenase will be active when...?
    1. AThe energy charge is low or, what is the same, with high levels of ADP
    2. BThe energy charge is low or, what is the same, with high levels of ATP
    3. CThe energy charge is high or, what is the same, with high levels of ADP
    4. DThe energy charge is high or, what is the same, with high levels of ATP
    5. EGlutamate dehydrogenase is always active
  8. 8Urea is produced and eliminated in liver
    1. ARichtig
    2. BFalsch
  9. 9Which of these statements is true?
    1. AIn the Glucose-Alanine cycle, one amino acid is transferred to one molecule of pyruvate, forming Alanine
    2. BIn the Glucose-Alanine cycle, one ammonium ion is transferred to one molecule of oxaloacetate, forming Alanine
    3. CIn the Glutamate-Glutamine cycle, one amino group is transported to one molecule of glutamic acid, forming Glutamate
    4. DIn the Glutamate-Glutamine cycle, one amino group is transported to one molecule of glutamic acid, forming Glutamine
    5. EAny of these is true
  10. 10Urea cycle:

    1.) One ammonium ion, bicarbonate (HCO3), and 2 molecules of [blank_start]ATP[blank_end] condense forming [blank_start]carbamoyl phosphate[blank_end].
    2.) This molecule condense with [blank_start]ornithine[blank_end] forming citrulline, and citrulline will be transferred to [blank_start]cytosol[blank_end].
    3.) There the citrulline condense with [blank_start]aspartic[blank_end] acid, what will form argininosuccinate.
    4.) These molecule will be fragmented releasing arginine and [blank_start]fumarate[blank_end].
    5.) Arginine will be fragmented again forming urea and [blank_start]ornithine[blank_end], that will be transferred back to mitochondria.
    1. AATP
    2. Bcarbamoyl phosphate
    3. Cornithine
    4. Dcytosol
    5. Efumarate
    6. Fornithine
    7. Gaspartic

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Metabolism of nitrogenous compounds test
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