摘要：30． (1)碳源.氮源.水.无机盐.生长因子······················································ 2分 (2)诱导基因突变························································································· 2分 (3)初级······································································································· 2分 合成精氨酸···························································································· 2分 不能将鸟氨酸转变成瓜氨酸···································································· 2分 (4)抗原······································································································· 2分 酶制剂··································································································· 2分 沉淀带····················································································· 2分
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下图为某细菌的生长曲线及A、B两种代谢产物积累曲线。请据图回答问题：
（1）与其他生物比较，微生物代谢异常旺盛的原因是________。
（2）A产物属于________代谢产物。B产物的积累量在细菌生长曲线的________期最大。
（3）在谷氨酸发酵过程中，培养基成分，除了加入碳源、氮源、水和无机盐外，还需要加入________。当培养基中的碳源和氮源之比为4∶1时，有利于延长________期。
（4）当谷氨酸的合成过量时，就会导致其合成途径中断，这种调节属于微生物代谢的________调节。
（5）在谷氨酸的生产中，可以采取________的手段，使谷氨酸能迅速排放到细胞外面，提高谷氨酸的产量；当培养液中________时，发酵罐中会有乳酸或琥珀酸出现。
下列有关某种以CO2为唯一碳源的自养微生物营养的描述中，不正确的是
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A．该微生物可能是硝化细菌，培养该微生物时不需要在培养基中加入氮源
B．碳源物质不是该微生物的能源物质
C．水和无机盐、生长因子等是该微生物不可缺少的营养物质
D．所培养的该微生物一定不是酵母菌和反硝化细菌
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B．碳源物质不是该微生物的能源物质
C．水和无机盐、生长因子等是该微生物不可缺少的营养物质
D．所培养的该微生物一定不是酵母菌和反硝化细菌