A 四氢叶酸(FH<img border="0" alt="" src="https://img.weimei168.com/uploads/upimg/20230804/12273542_0.gif">)是一碳单位转移酶的辅酶 B
一碳单位参与核酸合成 C
叶酸缺乏时可引起巨幼细胞性贫血 D
维生素B<img border="0" alt="" src="https://img.weimei168.com/uploads/upimg/20230804/12273542_0_1.gif">含有金属元素 E
维生素B<img border="0" alt="" src="https://img.weimei168.com/uploads/upimg/20230804/12273542_0_2.gif">和一碳单位代谢无关