M基因编码含63个氨基酸的肽链。该基因发生插入突变,使mRNA增加了一个三碱基序列AAG,表达的肽链含64个氨基酸。以下说法正确的是 A.M基因突变后,参与基因复制的嘌呤核苷酸比例增加 B.在M基因转录时,核糖核苷酸之间通过碱基配对连接 C.突变前后编码的两条肽链,最多有2个氨基酸不同 D.在突变基因的表达过程中,最多需要64种tRNA参与5、请你根据句意及所给首字母,补全下列单词。
1. There are two p________ on the
wall. They are very nice.
2. His phone n________ is 0532
-8101616.
3. Mary has a computer. She
p________ computer games every day.
4. We have three sports c________
basketball, ping - pong and soccer. Please join us!
5. Tomatoes are h________ food.
Please eat more tomatoes!
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