百度作业网生物问题··········
来源：学生作业帮 编辑：百度作业网作业帮 分类：英语作业 时间：2024/07/13 22:45:32
生物问题··········
what is the purpose pf making an RNA copy of a DNA sequence coding for a protein?
3.how does DNA replication occur in a precise manner to ensure that identical genetic information is put into the new chromosome?
4.the genetic material has to store information and be able to express it. what is the relationship between DNA, RNA, protein and phenotype?
5. what are the stop codons? what is the start codon? do any of these code for amino acids?
6. what are the three modifications made to pre-mRNA molecules before they become mature mRNAs ready to be used in protein synthesis? what is the function of each modification?
7. briefly describe the function of the following in protein synthesis: rRNA, tRNA, and mRNA.
8. Write the anticodons for the following amino acids:met,ser,leu,trp
9. given the following tRNA anticodon sequence, derive the mRNA and the DNA template strand. also, designate the protein that is encoded by this message.
tRNA: UAC UCU CGA GCG
mRNA
DNA
Protein
how many hydrogen bonds would be present in the DNA segment?
10.in which process, transcription or translation, do each of the following function:RNA polymerase, ribosomes, nucleotides, tRNA, pre-mRNA,DNA A site, anticodon,amino acids?
what is the purpose pf making an RNA copy of a DNA sequence coding for a protein?
3.how does DNA replication occur in a precise manner to ensure that identical genetic information is put into the new chromosome?
4.the genetic material has to store information and be able to express it. what is the relationship between DNA, RNA, protein and phenotype?
5. what are the stop codons? what is the start codon? do any of these code for amino acids?
6. what are the three modifications made to pre-mRNA molecules before they become mature mRNAs ready to be used in protein synthesis? what is the function of each modification?
7. briefly describe the function of the following in protein synthesis: rRNA, tRNA, and mRNA.
8. Write the anticodons for the following amino acids:met,ser,leu,trp
9. given the following tRNA anticodon sequence, derive the mRNA and the DNA template strand. also, designate the protein that is encoded by this message.
tRNA: UAC UCU CGA GCG
mRNA
DNA
Protein
how many hydrogen bonds would be present in the DNA segment?
10.in which process, transcription or translation, do each of the following function:RNA polymerase, ribosomes, nucleotides, tRNA, pre-mRNA,DNA A site, anticodon,amino acids?
最上面的算是第二问吧?
2、如楼上所说,一是因为DNA不能通过核孔,二是DNA为双螺旋结构,转录成RNA翻译更高效.
3、DNA的半保留复制
4、关于DNA、RNA、蛋白质的关系,搜索一下“中心法则”便知；表现型通常由遗传物质决定,受环境影响.
5、起始密码子、终止密码子都是RNA上的密码子,是RNA聚合酶开始和结束的识别位点.
6、这个问题还没听说过,sorry,或许你能更清楚的表达一下?
7、mRNA（message RNA）是翻译的模板；tRNA(transfer RNA)搬运蛋白质；rRNA（ribosomal RNA）是核糖体RNA,核糖体由RNA和蛋白质组成,为rRAN和tRNA提供结合位点.
8、met（甲硫氨酸）为AUG；ser（丝氨酸）的密码子有UCA UCG UCC UCU四种；leu（亮氨酸）有UUA UUG CUA CUC CUG CUU 六种；trp（色氨酸）为UGG.RNA的配对方式为A-U C-G ,自己可以推出反密码子吧?
9、tRNA:UAC UCU CGA GCG
mRNA AUG AGA GCU CGC
DNA TAC TCT CGA GCG
Protein 甲硫氨酸 精氨酸 丙氨酸 精氨酸
A-T、A-U间两个氢键,C-G间三个氢键.
10、RNA聚合酶：连接游离的核糖核苷酸,
核糖体：为rRAN和tRNA提供结合位点,
核苷酸：游离的核糖核苷酸为mRNA的原料,
tRNA：搬运蛋白质,
pre-mRNA：这个名词没听过,是指游离的核糖核苷酸吗?
反密码子：位于tRNA,与密码子结合,
氨基酸：蛋白质的基本单位.
算完了吧?累死了.
这些在高中课本都有,我刚高中毕业,有问题再交流.
以后有问题先搜索一下,很多能找到答案的.
2、如楼上所说,一是因为DNA不能通过核孔,二是DNA为双螺旋结构,转录成RNA翻译更高效.
3、DNA的半保留复制
4、关于DNA、RNA、蛋白质的关系,搜索一下“中心法则”便知；表现型通常由遗传物质决定,受环境影响.
5、起始密码子、终止密码子都是RNA上的密码子,是RNA聚合酶开始和结束的识别位点.
6、这个问题还没听说过,sorry,或许你能更清楚的表达一下?
7、mRNA（message RNA）是翻译的模板；tRNA(transfer RNA)搬运蛋白质；rRNA（ribosomal RNA）是核糖体RNA,核糖体由RNA和蛋白质组成,为rRAN和tRNA提供结合位点.
8、met（甲硫氨酸）为AUG；ser（丝氨酸）的密码子有UCA UCG UCC UCU四种；leu（亮氨酸）有UUA UUG CUA CUC CUG CUU 六种；trp（色氨酸）为UGG.RNA的配对方式为A-U C-G ,自己可以推出反密码子吧?
9、tRNA:UAC UCU CGA GCG
mRNA AUG AGA GCU CGC
DNA TAC TCT CGA GCG
Protein 甲硫氨酸 精氨酸 丙氨酸 精氨酸
A-T、A-U间两个氢键,C-G间三个氢键.
10、RNA聚合酶：连接游离的核糖核苷酸,
核糖体：为rRAN和tRNA提供结合位点,
核苷酸：游离的核糖核苷酸为mRNA的原料,
tRNA：搬运蛋白质,
pre-mRNA：这个名词没听过,是指游离的核糖核苷酸吗?
反密码子：位于tRNA,与密码子结合,
氨基酸：蛋白质的基本单位.
算完了吧?累死了.
这些在高中课本都有,我刚高中毕业,有问题再交流.
以后有问题先搜索一下,很多能找到答案的.