Quiz
BLOCK F: LESSONS 29, 30 & 31
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Perguntas do quiz (13)
1What of the next statements is not true about pepsinogen?
- APepsinogen is a zymogen
- BThe active form of pepsinogen is called pepsin
- CPepsinogen is transformed into pepsin in a basic medium
- DPepsin breaks the peptide bonds of proteins, so makes the proteins smaller
- EPepsin is not the only proenzyme present in the intestine
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].
- Adenatured
- Bpepsin
- Camino acids
- Denterocytes
- Eblood
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
- AVerdadeiro
- BFalso
4During desamination we will get one α-ketoacid and one amino acid.
- AVerdadeiro
- BFalso
5Pyruvate and oxaloacetate are α-ketoacids
- AVerdadeiro
- BFalso
6If glutamic acid is digested, what will probably happen?
- AIt will react with pyruvate and Alanine will be obtained
- BIt will react with oxaloacetate and Aspartic acid will be obtained
- CIt will react with α-ketoglutamine and Proline will be obtained
- DIt will suffer a desamination and will form α-ketoglutarate
- EIt will suffer a desamination and will form one pyruvate
7Glutamate dehydrogenase will be active when...?
- AThe energy charge is low or, what is the same, with high levels of ADP
- BThe energy charge is low or, what is the same, with high levels of ATP
- CThe energy charge is high or, what is the same, with high levels of ADP
- DThe energy charge is high or, what is the same, with high levels of ATP
- EGlutamate dehydrogenase is always active
8Urea is produced and eliminated in liver
- AVerdadeiro
- BFalso
9Which of these statements is true?
- AIn the Glucose-Alanine cycle, one amino acid is transferred to one molecule of pyruvate, forming Alanine
- BIn the Glucose-Alanine cycle, one ammonium ion is transferred to one molecule of oxaloacetate, forming Alanine
- CIn the Glutamate-Glutamine cycle, one amino group is transported to one molecule of glutamic acid, forming Glutamate
- DIn the Glutamate-Glutamine cycle, one amino group is transported to one molecule of glutamic acid, forming Glutamine
- EAny of these is true
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.- AATP
- Bcarbamoyl phosphate
- Cornithine
- Dcytosol
- Efumarate
- Fornithine
- Gaspartic
11Which of these statements is true about the urea cycle?
- A3 ATP are required, fumarate will be transported to CAC and aspartate forms part of the malate aspartate cycle
- B3 ATP are required, aspartate will be transported to CAC and a fumarate forms part of the malate fumarate cycle
- C2 ATP are required, fumarate will be transported to CAC and aspartate forms part of the malate aspartate cycle
- D2 ATP are required, aspartate will be transported to CAC and a fumarate forms part of the malate fumarate cycle
- EAny of these is true
12Which of these statements is true?
- AThe enzyme that is regulated in the urea cycle is carbomoyl phosphate synthetase I, which activator is N-acetylglutamate and is produced in the presence of high levels of arginine.
- BThe enzyme that is regulated in the urea cycle is carbomoyl phosphate synthetase I, which activator is N-acetylarginine and is produced in the presence of high levels of glutamate.
- CThe enzyme that is regulated in the urea cycle is carbomoyl ammonium synthetase I, which activator is N-acetylglutamate and is produced in the presence of high levels of ammonium.
- DThe enzyme that is regulated in the urea cycle is N-acetylglutamate synthetase I, which activator is carbomoyl phosphate and is produced in the presence of high levels of arginine.
- EThe enzyme that is regulated in the urea cycle is N-acetylarginine synthetase I, which activator is carbomoyl phosphate and is produced in the presence of high levels of glutamate.
13Carbon skeleton of AA can be used for the production of glucose or ketone bodies. Leucine for example can be used for the production of ketone bodies
- AVerdadeiro
- BFalso
Informações
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- Metabolism of nitrogenous compounds test
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