所屬科目:學士後西醫-普通生物及生化概論
21. In fatty acid synthesis, acetyl group is shuttled out of mitochondria as: (A) pyruvate (B) oxaloacetate (C) α-ketoglutarate (D) glutamine (E) citrate
30. The binding of _______ with lac repressor can activate the transcription of lac operon. (A) arabinose (B) isopropyl β-thiogalactoside (C) tryptophan (D) β-galactosidase (E) mannose
64. Which of the backbone repeated units of polysaccharides is not correct? (A) Amylose: (α1-4) Glc (B) Dextran: (α1-6) Glc (C) Glycogen: (α1-4) Glc (D) Cellulose: (β1-4) Glc (E) Chitin: (β1-4) Glc
72. Ketone bodies are overproduced in diabetes and during starvation. Which of the following metabolites is not an intermediate from two molecules of acetyl-CoA to acetone? (A) Acetoacetyl-CoA (B) β-hydroxy-β-methylglutaryl-CoA (C) Acetoacetate (D) β-hydroxybutyrate (E) CoA-SH
73. Which is not involved in fatty acid oxidation? (A) Starts from carboxylate end (B) Acyl-CoA dehydrogenase (C) Acyl-CoA hydratase (D) β-hydroxyacyl-CoA dehydrogenase (E) Acyl-CoA acetyltransferase
90Which description about β-adrenergic pathway (a G-protein coupling receptor; GPCR) is not correct? (A) The receptor is a 7-transmembrane protein. (B) Epinephrine binds to a GPCR. (C) The occupied receptor could cause the replacement of the GDP bound to GS (stimulatory G protein) by GTP, activating GS. (D) GSβ moves to adenylyl cyclase and activates it to synthesize cAMP. (E) cAMP activates PKA to trigger cellular response.