name large_stringclasses 12
values | year large_stringdate 2013-01-01 00:00:00 2014-01-01 00:00:00 | category large_stringclasses 6
values | qid int64 1 235 | qtext large_stringlengths 5 1.24k | ra int64 1 5 | answers large listlengths 5 5 |
|---|---|---|---|---|---|---|
Cuaderno_2014_1_Q | 2014 | chemistry | 177 | Why is chlorophyll green ?: | 3 | [
{
"aid": 1,
"atext": "Absorbs all wavelengths of the visible spectrum."
},
{
"aid": 2,
"atext": "Absorbs wavelengths only from the red and ultra-red parts of the spectrum (680nm, 700nm)."
},
{
"aid": 3,
"atext": "Absorbs wavelengths in the red and blue parts of the visible spectrum."... |
Cuaderno_2014_1_Q | 2014 | chemistry | 178 | Transketolase catalyzes the transformation of ribose-5-phosphate and xylulose-5-phosphate into: | 2 | [
{
"aid": 1,
"atext": "Two molecules of ribulose-5-phosphate."
},
{
"aid": 2,
"atext": "Sedoheptulose-7-phosphate and glyceraldehyde-3-phosphate."
},
{
"aid": 3,
"atext": "Fructose-6-phosphate and erythrose-4-phosphate."
},
{
"aid": 4,
"atext": "Glyceraldehyde-3-phosphate ... |
Cuaderno_2014_1_Q | 2014 | chemistry | 179 | In oxidative stress it is characteristic: | 4 | [
{
"aid": 1,
"atext": "Decrease in the concentration of oxidized glutathione."
},
{
"aid": 2,
"atext": "Increase in the concentration of reduced glutathione."
},
{
"aid": 3,
"atext": "Decreased production of reactive oxygen species."
},
{
"aid": 4,
"atext": "Increase in th... |
Cuaderno_2014_1_Q | 2014 | chemistry | 180 | Which amino acid is a precursor of neurotransmissions such as dopamine, adrenaline and noradrenaline ?: | 3 | [
{
"aid": 1,
"atext": "Tryptophan"
},
{
"aid": 2,
"atext": "Serina"
},
{
"aid": 3,
"atext": "Tyrosine"
},
{
"aid": 4,
"atext": "Aspartic."
},
{
"aid": 5,
"atext": "Glutamic"
}
] |
Cuaderno_2014_1_Q | 2014 | chemistry | 181 | Which of the following compounds acts as a reducing agent in fatty acid biosynthesis ?: | 2 | [
{
"aid": 1,
"atext": "NADH"
},
{
"aid": 2,
"atext": "NADPH."
},
{
"aid": 3,
"atext": "FAD +."
},
{
"aid": 4,
"atext": "FADH."
},
{
"aid": 5,
"atext": "NADP +."
}
] |
Cuaderno_2014_1_Q | 2014 | chemistry | 182 | If an animal organism has deficiencies in the path of pentose phosphate: | 5 | [
{
"aid": 1,
"atext": "There would be an excess of activity of the enzyme glutathione reductase."
},
{
"aid": 2,
"atext": "The pentose phosphate would be integrated into the glycolytic pathway."
},
{
"aid": 3,
"atext": "NADH would be used to replace NADPH."
},
{
"aid": 4,
... |
Cuaderno_2014_1_Q | 2014 | chemistry | 183 | The folded sheet β: | 3 | [
{
"aid": 1,
"atext": "It is formed by a single polypetide chain."
},
{
"aid": 2,
"atext": "It presents a distance between adjacent amino acids of approximately 4 ångströms."
},
{
"aid": 3,
"atext": "It is formed by the union of two or more strands by hydrogen bonds."
},
{
"ai... |
Cuaderno_2014_1_Q | 2014 | chemistry | 184 | In which part of the cell is ribosomal RNA synthesized ?: | 1 | [
{
"aid": 1,
"atext": "Nucleolus"
},
{
"aid": 2,
"atext": "Ribosomes."
},
{
"aid": 3,
"atext": "Vacuolas"
},
{
"aid": 4,
"atext": "Golgi apparatus."
},
{
"aid": 5,
"atext": "Endoplasmic reticulum."
}
] |
Cuaderno_2014_1_Q | 2014 | chemistry | 185 | The arginosuccinasa: | 4 | [
{
"aid": 1,
"atext": "In an enzyme of the citric acid cycle."
},
{
"aid": 2,
"atext": "Converts arginine to lysine."
},
{
"aid": 3,
"atext": "It is activated by the allosteric effector N-acetylglutamate."
},
{
"aid": 4,
"atext": "It produces fumarate."
},
{
"aid":... |
Cuaderno_2014_1_Q | 2014 | chemistry | 186 | In animals, where is most of the extracellular material components synthesized ?: | 2 | [
{
"aid": 1,
"atext": "In the smooth endoplasmic reticulum."
},
{
"aid": 2,
"atext": "In the rough endoplasmic reticulum."
},
{
"aid": 3,
"atext": "In the extracellular layer itself."
},
{
"aid": 4,
"atext": "In the plasma membrane."
},
{
"aid": 5,
"atext": "In... |
Cuaderno_2014_1_Q | 2014 | chemistry | 187 | What is the role of the helicase in replication ?: | 5 | [
{
"aid": 1,
"atext": "Join the single-stranded DNA to prevent the double helix from forming again."
},
{
"aid": 2,
"atext": "Catalyze the union of nucleotides."
},
{
"aid": 3,
"atext": "Correct the errors that occur in the replication."
},
{
"aid": 4,
"atext": "Synthesize... |
Cuaderno_2014_1_Q | 2014 | chemistry | 188 | Nitric oxide: | 4 | [
{
"aid": 1,
"atext": "It is synthesized from methionine."
},
{
"aid": 2,
"atext": "Activates cAMP-dependent protein kinase (PKA)."
},
{
"aid": 3,
"atext": "It binds to receptors coupled to G proteins (GPCR)."
},
{
"aid": 4,
"atext": "Induces relaxation of the vascular end... |
Cuaderno_2014_1_Q | 2014 | chemistry | 189 | The proteasome: | 2 | [
{
"aid": 1,
"atext": "It is formed by 21 homologous subunits organized in 3 rings."
},
{
"aid": 2,
"atext": "It is a protein complex that catalyzes the hydrolysis of ubiquitinated proteins."
},
{
"aid": 3,
"atext": "It is found only in animal eukaryotic cells."
},
{
"aid": 4,... |
Cuaderno_2014_1_Q | 2014 | chemistry | 190 | Regarding telomerases, which of the following statements is not true ?: | 3 | [
{
"aid": 1,
"atext": "They have reverse transcriptase activity."
},
{
"aid": 2,
"atext": "They prevent shortening of telomeres."
},
{
"aid": 3,
"atext": "Its defect promotes carcinogenesis."
},
{
"aid": 4,
"atext": "Its activity is essential for the stability of chromosom... |
Cuaderno_2014_1_Q | 2014 | chemistry | 191 | A person who presents with urine a high [Urea], possibly leads a diet: | 1 | [
{
"aid": 1,
"atext": "Very low in carbohydrates and very high in proteins."
},
{
"aid": 2,
"atext": "Very high in fat and low in protein."
},
{
"aid": 3,
"atext": "Balanced except in carbohydrates."
},
{
"aid": 4,
"atext": "Moderate in carbohydrates and balanced in fats a... |
Cuaderno_2014_1_Q | 2014 | chemistry | 192 | The urea cycle: | 5 | [
{
"aid": 1,
"atext": "It involves the degradation of urea."
},
{
"aid": 2,
"atext": "It was proposed by Hatch and Slack."
},
{
"aid": 3,
"atext": "It contains a reaction that transforms citrulline into ornithine."
},
{
"aid": 4,
"atext": "It is intimately linked to glycol... |
Cuaderno_2014_1_Q | 2014 | chemistry | 193 | The speed of the electron transport chain: | 3 | [
{
"aid": 1,
"atext": "It depends on the concentration of oxygen."
},
{
"aid": 2,
"atext": "Increases when the concentration of ATP increases."
},
{
"aid": 3,
"atext": "It is determined by the need for ATP."
},
{
"aid": 4,
"atext": "It is independent of ADP phosphorylation... |
Cuaderno_2014_1_Q | 2014 | chemistry | 194 | The restriction enzymes hydrolyze bonds: | 1 | [
{
"aid": 1,
"atext": "Phosphodiester"
},
{
"aid": 2,
"atext": "Glucosidics"
},
{
"aid": 3,
"atext": "Peptides"
},
{
"aid": 4,
"atext": "Ionic"
},
{
"aid": 5,
"atext": "By hydrogen bridges."
}
] |
Cuaderno_2014_1_Q | 2014 | chemistry | 195 | In humans, the synthesis of aspartate from oxaloacetate is catalysed by: | 4 | [
{
"aid": 1,
"atext": "Oxalacetate decarboxylase."
},
{
"aid": 2,
"atext": "Aspartate synthetase."
},
{
"aid": 3,
"atext": "Aspartate dehydrogenase."
},
{
"aid": 4,
"atext": "Pyridoxal phosphate-dependent transaminase."
},
{
"aid": 5,
"atext": "Oxalacetate liga... |
Cuaderno_2014_1_Q | 2014 | chemistry | 196 | The micro RNA (miRNA): | 3 | [
{
"aid": 1,
"atext": "They are coding RNAs."
},
{
"aid": 2,
"atext": "They inhibit transcription."
},
{
"aid": 3,
"atext": "They inhibit the translation."
},
{
"aid": 4,
"atext": "Activate transcription."
},
{
"aid": 5,
"atext": "Activate the translation."
}... |
Cuaderno_2014_1_Q | 2014 | chemistry | 197 | What characteristic is not common in biological membranes ?: | 5 | [
{
"aid": 1,
"atext": "They are fluid."
},
{
"aid": 2,
"atext": "They are composed of lipids and proteins."
},
{
"aid": 3,
"atext": "They are asymmetrical."
},
{
"aid": 4,
"atext": "They are electrically polarized."
},
{
"aid": 5,
"atext": "The various componen... |
Cuaderno_2014_1_Q | 2014 | chemistry | 198 | The hydrogen atoms with partial positive charge of one water molecule can interact with the oxygen atoms, with negative partial charge of another water molecule. What name does this interaction receive? : | 3 | [
{
"aid": 1,
"atext": "Hydrophobic"
},
{
"aid": 2,
"atext": "Polar."
},
{
"aid": 3,
"atext": "Hydrogen bridge."
},
{
"aid": 4,
"atext": "Van der Wall."
},
{
"aid": 5,
"atext": "Zwitterion."
}
] |
Cuaderno_2014_1_Q | 2014 | chemistry | 199 | In relation to DNA replication, the term processivity indicates: | 4 | [
{
"aid": 1,
"atext": "Error rate of the polymerase."
},
{
"aid": 2,
"atext": "Deletion of one or more bases in the DNA."
},
{
"aid": 3,
"atext": "Specificity in the speed of replication."
},
{
"aid": 4,
"atext": "The ability of the enzyme to catalyze multiple consecutive ... |
Cuaderno_2014_1_Q | 2014 | chemistry | 200 | The hepatic synthesis of methionine from homocysteine requires: | 2 | [
{
"aid": 1,
"atext": "Methylmalonyl-CoA mutase."
},
{
"aid": 2,
"atext": "Methylcobalamin."
},
{
"aid": 3,
"atext": "5'-Adenosilcobalamin."
},
{
"aid": 4,
"atext": "Coenzyme B6."
},
{
"aid": 5,
"atext": "Methionine adenosyl transferase."
}
] |
Cuaderno_2014_1_Q | 2014 | chemistry | 201 | The hydrolysis of phosphatidylinositol 4,5-bisphosphate (PIP2) by phospholipase C generates the following second messengers: | 3 | [
{
"aid": 1,
"atext": "Inositol 1,4,5-trisphosphate and triacylglycerol."
},
{
"aid": 2,
"atext": "Inositol 1,4, 5-trisphosphate and glycerol."
},
{
"aid": 3,
"atext": "Inositol 1,4, 5-trisphosphate and diacylglycerol."
},
{
"aid": 4,
"atext": "Inositol 4,5-bisphosphate an... |
Cuaderno_2014_1_Q | 2014 | chemistry | 202 | The LDL: | 1 | [
{
"aid": 1,
"atext": "They transport cholesterol to the tissues."
},
{
"aid": 2,
"atext": "They transport cholesterol to the liver."
},
{
"aid": 3,
"atext": "They transport \"good\" cholesterol."
},
{
"aid": 4,
"atext": "Low blood levels are associated with a lower risk o... |
Cuaderno_2014_1_Q | 2014 | chemistry | 203 | What type of amino acid side chains will compete with saline ions for solvation water ?: | 4 | [
{
"aid": 1,
"atext": "Apolares."
},
{
"aid": 2,
"atext": "Aliphatic"
},
{
"aid": 3,
"atext": "Aromatic"
},
{
"aid": 4,
"atext": "Polar"
},
{
"aid": 5,
"atext": "Without charge."
}
] |
Cuaderno_2014_1_Q | 2014 | chemistry | 204 | What is the first level of organization of DNA in chromosomes': | 2 | [
{
"aid": 1,
"atext": "Histones."
},
{
"aid": 2,
"atext": "Nucleosomes."
},
{
"aid": 3,
"atext": "Sugar-phosphate chains."
},
{
"aid": 4,
"atext": "Proteosomes"
},
{
"aid": 5,
"atext": "Nucleotides"
}
] |
Cuaderno_2014_1_Q | 2014 | chemistry | 205 | Which process is not related to a proton gradient ?: | 3 | [
{
"aid": 1,
"atext": "Oxidative phosphorylation"
},
{
"aid": 2,
"atext": "Synthesis of NADPH."
},
{
"aid": 3,
"atext": "Glucolysis"
},
{
"aid": 4,
"atext": "Heat production"
},
{
"aid": 5,
"atext": "Active transport."
}
] |
Cuaderno_2014_1_Q | 2014 | chemistry | 206 | The thromboxanes: | 1 | [
{
"aid": 1,
"atext": "They induce platelet aggregation."
},
{
"aid": 2,
"atext": "They inhibit platelet aggregation."
},
{
"aid": 3,
"atext": "They act as bronchodilators in the respiratory system."
},
{
"aid": 4,
"atext": "They are produced in the membranes of all cells.... |
Cuaderno_2014_1_Q | 2014 | chemistry | 207 | What sequence of RNA bases will be produced when the AGGCCTTTACGC DNA fragment is transcribed ?: | 5 | [
{
"aid": 1,
"atext": "TCCGGAAATGCG."
},
{
"aid": 2,
"atext": "AGGCCUUUACGC."
},
{
"aid": 3,
"atext": "UGGCCUUUUGCG"
},
{
"aid": 4,
"atext": "UGGCCUUUUCGC."
},
{
"aid": 5,
"atext": "UCCGGAAAUGCG."
}
] |
Cuaderno_2014_1_Q | 2014 | chemistry | 208 | Chymotrypsin is a digestive enzyme with activity: | 2 | [
{
"aid": 1,
"atext": "DNAsa."
},
{
"aid": 2,
"atext": "Protease"
},
{
"aid": 3,
"atext": "RNAsa."
},
{
"aid": 4,
"atext": "Lipasa"
},
{
"aid": 5,
"atext": "Glycosidase"
}
] |
Cuaderno_2014_1_Q | 2014 | chemistry | 209 | Biotin is a transporter of: | 1 | [
{
"aid": 1,
"atext": "CO2"
},
{
"aid": 2,
"atext": "Phosphoryl"
},
{
"aid": 3,
"atext": "Acilo"
},
{
"aid": 4,
"atext": "Methyl."
},
{
"aid": 5,
"atext": "Electrons"
}
] |
Cuaderno_2014_1_Q | 2014 | chemistry | 210 | Intestinal absorption of carbohydrates by absorptive cells: | 3 | [
{
"aid": 1,
"atext": "It can be carried out with monosaccharides and disaccharides."
},
{
"aid": 2,
"atext": "Sucrose is transported by sucrase."
},
{
"aid": 3,
"atext": "Glucose is transported by facilitated diffusion and by Na + -dependent facilitated transport."
},
{
"aid"... |
Cuaderno_2014_1_Q | 2014 | chemistry | 211 | Ultraviolet radiation changes the structure of DNA by: | 4 | [
{
"aid": 1,
"atext": "Rupture of phosphodiester bonds."
},
{
"aid": 2,
"atext": "Deamination of nitrogenous bases."
},
{
"aid": 3,
"atext": "Depurinization"
},
{
"aid": 4,
"atext": "Formation of cyclobutyl rings of pyrimidines."
},
{
"aid": 5,
"atext": "Hydrox... |
Cuaderno_2014_1_Q | 2014 | chemistry | 212 | Apoptosis is: | 2 | [
{
"aid": 1,
"atext": "The cellular senescence."
},
{
"aid": 2,
"atext": "A form of programmed cell death."
},
{
"aid": 3,
"atext": "Cell migration"
},
{
"aid": 4,
"atext": "A mode of cellular reprogramming."
},
{
"aid": 5,
"atext": "The process of cell differe... |
Cuaderno_2014_1_Q | 2014 | chemistry | 213 | The mitochondrial genome: | 1 | [
{
"aid": 1,
"atext": "It is circular."
},
{
"aid": 2,
"atext": "It is single-strand."
},
{
"aid": 3,
"atext": "It encodes all mitochondrial proteins."
},
{
"aid": 4,
"atext": "It is part of the nuclear DNA."
},
{
"aid": 5,
"atext": "None of the above."
}
] |
Cuaderno_2014_1_Q | 2014 | chemistry | 215 | The lipogenesis takes place mainly in: | 2 | [
{
"aid": 1,
"atext": "The mitochondria'."
},
{
"aid": 2,
"atext": "The cytosol."
},
{
"aid": 3,
"atext": "The peroxisomes."
},
{
"aid": 4,
"atext": "The lysosomes."
},
{
"aid": 5,
"atext": "The lipid rafts of the membranes."
}
] |
Cuaderno_2014_1_Q | 2014 | chemistry | 216 | The non-protein molecules that bind to the protein part of the enzyme constitute the complete enzyme are called: | 1 | [
{
"aid": 1,
"atext": "Cofactors"
},
{
"aid": 2,
"atext": "Metallic ions"
},
{
"aid": 3,
"atext": "Coenzymes."
},
{
"aid": 4,
"atext": "Vitamins"
},
{
"aid": 5,
"atext": "Prosthetic groups."
}
] |
Cuaderno_2014_1_Q | 2014 | chemistry | 217 | Form B of DNA: | 3 | [
{
"aid": 1,
"atext": "It is formed by a double helix levorotatory with two antiparallel nucleotide chains."
},
{
"aid": 2,
"atext": "It is wider and longer than form A."
},
{
"aid": 3,
"atext": "It has pairs of nitrogenous bases perpendicular to the axis of the helix."
},
{
"... |
Cuaderno_2014_1_Q | 2014 | chemistry | 218 | Hydroxylation of Lys and Pro residues in collagen requires: | 4 | [
{
"aid": 1,
"atext": "Vitamin B."
},
{
"aid": 2,
"atext": "Vitamin A."
},
{
"aid": 3,
"atext": "Vitamin D."
},
{
"aid": 4,
"atext": "Vitamin C."
},
{
"aid": 5,
"atext": "None of the above options."
}
] |
Cuaderno_2014_1_Q | 2014 | chemistry | 220 | All of the following is part of the nucleosides EXCEPT: | 1 | [
{
"aid": 1,
"atext": "Phosphate group."
},
{
"aid": 2,
"atext": "Deoxyribose"
},
{
"aid": 3,
"atext": "Ribosa."
},
{
"aid": 4,
"atext": "Pentose"
},
{
"aid": 5,
"atext": "Pyrrhic base."
}
] |
Cuaderno_2014_1_Q | 2014 | chemistry | 221 | All the following events occur during the formation of phosphoenolpyruvate from pyruvate EXCEPT: | 3 | [
{
"aid": 1,
"atext": "CO2 is consumed."
},
{
"aid": 2,
"atext": "CO2 comes out."
},
{
"aid": 3,
"atext": "CoA is needed."
},
{
"aid": 4,
"atext": "ATP hydrolyzes."
},
{
"aid": 5,
"atext": "GTP is hydrolyzed."
}
] |
Cuaderno_2014_1_Q | 2014 | chemistry | 222 | The final product of the cytosolic fatty acid synthase in humans is acid: | 4 | [
{
"aid": 1,
"atext": "Oleic"
},
{
"aid": 2,
"atext": "Arachidonic."
},
{
"aid": 3,
"atext": "Linoleic"
},
{
"aid": 4,
"atext": "Palmitic."
},
{
"aid": 5,
"atext": "Palmitoleic"
}
] |
Cuaderno_2014_1_Q | 2014 | chemistry | 223 | Which of the following options is NOT an effect of insulin ?: | 1 | [
{
"aid": 1,
"atext": "Stimulates hepatic gluconeogenesis."
},
{
"aid": 2,
"atext": "Stimulates the uptake of glucose at the level of white adipose tissue."
},
{
"aid": 3,
"atext": "Stimulates lipogenesis at the level of white adipose tissue."
},
{
"aid": 4,
"atext": "Stim... |
Cuaderno_2014_1_Q | 2014 | chemistry | 224 | Which of the following is not a fat-soluble vitamin ?: | 2 | [
{
"aid": 1,
"atext": "Vitamin A."
},
{
"aid": 2,
"atext": "Vitamin C."
},
{
"aid": 3,
"atext": "Vitamin D."
},
{
"aid": 4,
"atext": "Vitamin E."
},
{
"aid": 5,
"atext": "Vitamin K."
}
] |
Cuaderno_2014_1_Q | 2014 | chemistry | 225 | About free radicals: | 4 | [
{
"aid": 1,
"atext": "They are compounds that contain two or three unpaired electrons in an outer orbital."
},
{
"aid": 2,
"atext": "Reactive oxygen species (ROS) in the cell are only generated enzymatically."
},
{
"aid": 3,
"atext": "Hydrogen peroxide is the most damaging radical in... |
Cuaderno_2014_1_Q | 2014 | chemistry | 226 | Which of the following characteristics of the genetic code is NOT CORRECT ?: | 4 | [
{
"aid": 1,
"atext": "The sequence of nitrogenous bases of a given gene has a fixed reading frame and no punctuation marks."
},
{
"aid": 2,
"atext": "It is degenerate, because for many amino acids there is more than one codon that encodes it."
},
{
"aid": 3,
"atext": "The degeneratio... |
Cuaderno_2014_1_Q | 2014 | chemistry | 227 | Sulfonic acids are converted to sulfonyl chlorides by treatment with: | 4 | [
{
"aid": 1,
"atext": "Methylene chloride"
},
{
"aid": 2,
"atext": "Chlorine."
},
{
"aid": 3,
"atext": "Sodium chloride."
},
{
"aid": 4,
"atext": "Thionyl chloride."
},
{
"aid": 5,
"atext": "Chloroform."
}
] |
Cuaderno_2014_1_Q | 2014 | chemistry | 228 | The aminoacyl-tRNA synthetases: | 5 | [
{
"aid": 1,
"atext": "In conjunction with another enzyme, they bind the amino acid to the tRNA."
},
{
"aid": 2,
"atext": "They interact directly with free ribosomes."
},
{
"aid": 3,
"atext": "They exist in multiple forms for each amino acid."
},
{
"aid": 4,
"atext": "They... |
Cuaderno_2014_1_Q | 2014 | chemistry | 229 | Mass spectrometry is combined with chromatography to generate a very powerful analytical tool. With regard to mass spectrometry (MS), it can be said that: | 2 | [
{
"aid": 1,
"atext": "The electronic ionization is based on the ion-molecule reactions between the reactive gas ions and the analyte molecules."
},
{
"aid": 2,
"atext": "The linear quadrupole mass analyzer consists of four cylinders that are placed in parallel so that they are positively and neg... |
Cuaderno_2014_1_Q | 2014 | chemistry | 230 | In protein biosynthesis, base pairing takes place during the translation process between: | 4 | [
{
"aid": 1,
"atext": "RNA and DNA"
},
{
"aid": 2,
"atext": "DNA and ribosomal RNA"
},
{
"aid": 3,
"atext": "Transfer RNA and ribosomal RNA"
},
{
"aid": 4,
"atext": "The messenger RNA and the transfer RNA."
},
{
"aid": 5,
"atext": "18S ribosomal RNA and 5S ribo... |
Cuaderno_2014_1_Q | 2014 | chemistry | 231 | The synthesis with malonic ester is an important method to prepare: | 5 | [
{
"aid": 1,
"atext": "Ketones"
},
{
"aid": 2,
"atext": "Aldehydes."
},
{
"aid": 3,
"atext": "Alcohols"
},
{
"aid": 4,
"atext": "Amides"
},
{
"aid": 5,
"atext": "Acids"
}
] |
Cuaderno_2014_1_Q | 2014 | chemistry | 232 | The analysis by potentiometric redisolution is characterized: | 3 | [
{
"aid": 1,
"atext": "By using the square wave as an element of excitation."
},
{
"aid": 2,
"atext": "Because the redisolution stage is carried out without agitation."
},
{
"aid": 3,
"atext": "Because the reoxidation step is carried out by an oxidizing agent."
},
{
"aid": 4,
... |
Cuaderno_2014_1_Q | 2014 | chemistry | 233 | After the reaction of some xenobiotics with glutathione, the final product is formed: | 5 | [
{
"aid": 1,
"atext": "Sulfanil urea."
},
{
"aid": 2,
"atext": "Reduced glutathione"
},
{
"aid": 3,
"atext": "Oxidized glutathione."
},
{
"aid": 4,
"atext": "Thiosulfate."
},
{
"aid": 5,
"atext": "Mercapturic acid."
}
] |
Cuaderno_2014_1_Q | 2014 | chemistry | 234 | Indicate, which of the compounds listed below, has a higher acidity: | 2 | [
{
"aid": 1,
"atext": "Acetic acid."
},
{
"aid": 2,
"atext": "Hydrogen bromide"
},
{
"aid": 3,
"atext": "Sulfuric acid."
},
{
"aid": 4,
"atext": "Carbonic acid."
},
{
"aid": 5,
"atext": "Nitric acid."
}
] |
Cuaderno_2014_1_Q | 2014 | chemistry | 235 | A conjugated protein is: | 1 | [
{
"aid": 1,
"atext": "A protein that contains chemical components different from the permanently associated amino acids."
},
{
"aid": 2,
"atext": "A protein that contains amino acids with side chains with conjugated bonds."
},
{
"aid": 3,
"atext": "A protein that contains chemical co... |
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