8.When C. albicans was grown in LM that contained 20 nMol/L biotin,the resulting biotin-suffieient organisms took up biotin principally by facilitated diffusion and showed little active transport.

• 在生物素摄入充足的白色念珠菌（在含20nMol／L生物素的培养基中生长），生物素主要通过简单的弥散方式进入菌体内。