【单选题】the symptoms of a certain inherited disorder in humans include respiratory problems and, in males, sterility. which of the following is a reasonable hypothesis for the molecular basis of this disorder?
【单选题】a 20-month-old boy is diagnosed with hutchinson-gilford progerial syndrome (hgps), a severe form of early-onset premature aging. fetal and early postnatal development are normal, but there is now severe failure to thrive, some lipoatrophy, bony abnormalities, a all, beaked nose and receding mandible, hair loss, and speckled hypopigmentation with some areas of tight hard skin. his neurological and cognitive tests are normal. genetic ysis shows a single spontaneous mutation in codon 608 of the lmna gene, which encodes both lamin a and lamin c. which one of the following would you most likely expect to be a direct effect in cells obtained from this patient?
【单选题】dolastatin 11 is a promising chemotherapeutic depsipeptide that arrests mitotic cells in the process shown in the accompanying electron micrograph. which one of the following would be a possible mechani for dolastatin?