4302252
Description
Quiz by gyorgycrack, updated more than 1 year ago
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Created by gyorgycrack
over 8 years ago
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Question 1
Question
What of the next statements is not true about pepsinogen?
Answer
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Pepsinogen is a zymogen
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The active form of pepsinogen is called pepsin
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Pepsinogen is transformed into pepsin in a basic medium
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Pepsin breaks the peptide bonds of proteins, so makes the proteins smaller
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Pepsin is not the only proenzyme present in the intestine
Question 2
Question
For 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].
Answer
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denatured
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pepsin
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amino acids
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enterocytes
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blood
Question 3
Question
The 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
Answer
- True
- False
Question 4
Question
During desamination we will get one α-ketoacid and one amino acid.
Answer
- True
- False
Question 5
Question
Pyruvate and oxaloacetate are α-ketoacids
Answer
- True
- False
Question 6
Question
If glutamic acid is digested, what will probably happen?
Answer
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It will react with pyruvate and Alanine will be obtained
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It will react with oxaloacetate and Aspartic acid will be obtained
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It will react with α-ketoglutamine and Proline will be obtained
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It will suffer a desamination and will form α-ketoglutarate
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It will suffer a desamination and will form one pyruvate
Question 7
Question
Glutamate dehydrogenase will be active when...?
Answer
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The energy charge is low or, what is the same, with high levels of ADP
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The energy charge is low or, what is the same, with high levels of ATP
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The energy charge is high or, what is the same, with high levels of ADP
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The energy charge is high or, what is the same, with high levels of ATP
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Glutamate dehydrogenase is always active
Question 8
Question
Urea is produced and eliminated in liver
Answer
- True
- False
Question 9
Question
Which of these statements is true?
Answer
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In the Glucose-Alanine cycle, one amino acid is transferred to one molecule of pyruvate, forming Alanine
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In the Glucose-Alanine cycle, one ammonium ion is transferred to one molecule of oxaloacetate, forming Alanine
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In the Glutamate-Glutamine cycle, one amino group is transported to one molecule of glutamic acid, forming Glutamate
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In the Glutamate-Glutamine cycle, one amino group is transported to one molecule of glutamic acid, forming Glutamine
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Any of these is true
Question 10
Question
Urea 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.
Answer
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ATP
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carbamoyl phosphate
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ornithine
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cytosol
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fumarate
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ornithine
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aspartic
Question 11
Question
Which of these statements is true about the urea cycle?
Answer
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3 ATP are required, fumarate will be transported to CAC and aspartate forms part of the malate aspartate cycle
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3 ATP are required, aspartate will be transported to CAC and a fumarate forms part of the malate fumarate cycle
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2 ATP are required, fumarate will be transported to CAC and aspartate forms part of the malate aspartate cycle
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2 ATP are required, aspartate will be transported to CAC and a fumarate forms part of the malate fumarate cycle
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Any of these is true
Question 12
Question
Which of these statements is true?
Answer
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The 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.
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The 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.
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The 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.
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The 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.
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The 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.
Question 13
Question
Carbon 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
Answer
- True
- False
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