例句與造句

1. Plasmids are exta-chromosomal doublestranded, circular dna molecules found in prokaryotic and eukaryotic cells .
   質(zhì)粒是在原核和真核細(xì)胞中發(fā)現(xiàn)的染色體外的雙鏈環(huán)狀DNA分子。
2. Plasmids are exta - chromosomal doublestranded , circular dna molecules found in prokaryotic and eukaryotic cells
   質(zhì)粒是在原核和真核細(xì)胞中發(fā)現(xiàn)的染色體外的雙鏈環(huán)狀dna分子。
3. To find dnaase in the earthworm the tissue extract of earthworm with different concentration reacted with rna , circular dna , linear dna for an hour at 37 , then the producetion was detected by 1 % agrose gel . the tissue extract of earthworm , the tissue protein extract of earthworm and the tissue extract of earthworm without protein reacted with pbv220 - r - inf for an hour at 37 , then the producetion was detected by 1 % agrose gel . 2
   雙胸蚓組織中dna酶的發(fā)現(xiàn)用不同濃度的雙胸蚓組織提取液與rna 、環(huán)狀dna及線狀dna在37反應(yīng)1小時后用1的瓊脂糖凝膠電泳對其反應(yīng)產(chǎn)物進(jìn)行觀察；雙胸蚓組織粗提取液、雙胸蚓組織蛋白粗提取液及雙胸蚓組織去蛋白提取液分別與pbv220 - ? inf質(zhì)粒37反應(yīng)1小時后用1的瓊脂糖凝膠電泳對其反應(yīng)產(chǎn)物進(jìn)行觀察。
4. It's difficult to find circular dna in a sentence. 用circular dna造句挺難的