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Biochemistry Questions

Explore questions in the Biochemistry category that you can ask Spark.E!

What is the monomer of Proteins and what holds them together in a polymer

-What are the building blocks of carbohydrates?-What functional groups make up monosaccharides?-How can monosaccharides be linked together and what do they form?

1. This enzyme is known to have a PROSTHETIC group coenzyme:a. glutaminaseb. alanine aminotransferasec. glutamine synthetased. glutamate dehydrogenase

1. The carbon skeleton of this amino acid cannot be converted to glucose:a. glutamateb. alaninec. aspartated. leucine

1. Which amino acid is glucogenic & ketogenic?a. alanineb. leucinec. glutamated. tyrosine

1. Which plant enzyme is particularly important in assimilating NH4+ ions generated by symbiotic bacteria?a. ureaseb. nitrogenasec. glutamine synthetased. glutaminase

1. Which of these metabolites has the SMALLEST size?a. aspartateb. ureac. ATPd. Argininosuccinate

1. Which of these molecules is NOT a precursor of the carbon-skeleton of PROTEIN amino acids?a. oxaloacetateb. ribulose 5-phosphatec. 3-phosphoglycerated. Pyruvate

1. Which of these molecules is not charged at physiological pH? ??????a. Arginase (enzyme of urea cycle)b. citrulline (metabolite of urea cycle)c. alanine (metabolite of glucose-alanine cycle) (transporter for Nitrogen)d. ureae. ornithine (enzyme in urea cycle)

1. Which molecule is a precursor for the structural backbone of purines & pyrimidines?a. glycineb. aspartatec. folated. CO2

1. The nitrogen from this molecule is not converted to urea:a. glutamateb. cytosinec. guanined. uracil

1. Which amino acid is not essential?a. tyrosineb. threoninec. leucined. histidine

1. This metabolite does not appear to participate in regulating the urea cycle:a. glutamateb. N-acetylglutamatec. arginined. acetyl-CoAe. glutamine

1. Which of these amino acids is a PRECURSOR of niacin, serotonin & melatonin?a. tyrosineb. tryptophanc. phenylalanined. cysteine

1. The urea cycle takes place in the:a. small intestineb. pancreasc. liverd. stomach

1. Which amino acid CANNOT be converted to ketone bodies?a. asparagineb. leucinec. tyrosined. tryptophan

1. Which amino acid contributes about two thirds of the structural components of pyrimidines?a. glycineb. glutamatec. glutamined. aspartate

1. Which of these is a liver enzyme?a. nitrogenaseb. lactose synthasec. dihydrobiopterin reductased. pyruvate decarboxylase

1. Which metabolite is the PRECURSOR for the synthesis of SERINE?a. 3-phosphoglycerateb. pyruvatec. phosphoenolpyruvated. oxaloacetate

1. This molecule is not charged at physiological pH:a. adenosineb. leucinec. GMPd. Arginase

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