Which of the following alpha-amino acids is a diamino-monocarboxylic acid? (a) L

Question

Which of the following alpha-amino acids is a diamino-monocarboxylic acid? (a) Leucine (b) Arginine (c) gamma-Carboxyglutamic acid? (d) None of the above Which of the following statements best describes the DNA polymerase activity within eukaryotic cells? (a) The enzyme catalyzes the polymerization of deoxyribonucleotides into DNA strands (b) The enzymes are best known for their feedback role in DNA replication (c) The enzyme uses magnesium ions as cofactors (d) It carries out elongation of DNA chains in a 3' to 5' direction (e) All of the above Of the possible combinations of the three base (a) 61 have been assigned to the coding of amino acids (b) 60 have been assigned to the coding of amino acids (c) 64 have been assigned to the coding of amino acids (d) 62 have been assigned to the coding amino acids During the process of transcription, the core enzyme, the RNA polymerase (alpha alpha_2, beta beta^+) alone cannot recognize the promoter regions, the sigma factor is essential for this process (a) True (b) False The substitution of valine for glutamic acid in the sixth position of the beta-chain of hemoglobin produces sickle-cell anemia in the homozygote because (a) Co-operative binding of oxygen is lost because of the missing Glu-6 residue. As such the cell prevents oxygen from reaching the spleen, liver, kidneys, lungs, heart, or other organs, causing a lot of damage. (b) The Apoprotein can no longer protect the heme iron from becoming oxidized owing to the presence of the hydrophobic Val-6 (c) The Val-6 variant loses solubility upon deoxygenation (d) The Val-6 variant tends to retain oxygen when the oxygen tension is low (e) The red cell is unable to sequester high enough concentrations of the Val-6 variant hemoglobin The lock and key theory of enzyme activity is where (a) The site other than the active site of the enzyme is non-complimentary in conformation to the substrate (b) The active site of the enzyme is non-complimentary in conformation to the substrate (c) The site other than the active site of the enzyme is complimentary in conformation to the substrate (d) The active site of the enzyme is complimentary in conformation to the substrate (e) None of the above The induced theory of enzyme activity is where the enzyme changes shape upon binding the that (a) The of substrate and enzyme protein only non-complimentary after the binding reaction The conformation of substrate conformation and enzyme changes shape upon binding the substrate so that (a) The conformation of substrate and enzyme protein are only non-complimentary after the binding reaction (b) The conformation of substrate and enzyme protein are only associative after the binding reaction (c) The conformation of substrate and enzyme protein are only complimentary after the binding reaction (d)

Explanation / Answer

19. (B) Arginine is the answer.

Because arginine have two amino group and one carboxylic acid group. So that's why this alpha amino acid is called as diamine mono carboxylic acid.

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