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一、相关实验(一)肺炎双球菌转化实验例1下图表示格里菲思所做的肺炎双球菌转化实验的部分实验过程,S型菌有荚膜且具有毒性,能使人患肺炎或使小鼠患败血症,R型菌无荚膜也无毒性。有关说法错误的是()A.与R型菌混合前必须将S型菌慢慢冷却B.无毒的R型菌转化为有毒的S型菌属于基因重组C.该转化实验不能证明DNA是遗传物质D.S型菌的DNA能抵抗机体的免疫系统,从而引发疾病
I. Related Experiments (1) Experimental Example 1 of the Transformation of Pneumococcus The following figure shows part of the experimental process of the pneumococcal transformation experiment performed by Griffiths. The S-shaped bacteria have decidua and are toxic, and can cause people to suffer from pneumonia or Mice suffer from sepsis, and R-type bacteria are non-deciduous and non-toxic. The wrong argument is () A. S-type bacteria must be slowly cooled before mixing with the type B bacteria B. The conversion of non-toxic R-type bacteria into toxic S-type bacteria belongs to gene recombination C. This transformation experiment cannot prove that the DNA is The DNA of the genetic material DS strain resists the body’s immune system and causes disease