第二章单元测试
- 5’-end of the majority of mRNA in eukaryotes has （ ）
- Which statement is NOT true for tRNA? （ ）
- Which statement is NOT true for RNA? （ ）
- Which statement is true for Tm? （ ）
- The secondary structure of DNA is （ ）
- The tertiary structure of tRNA is （ ）
- 3'-end of mRNA has （ ）
- The RNA that can carry amino acid and transfer it to ribosome is （ ）
- The template of protein synthesis is （ ）
- DNA can be separated into two single chains during heating （ ）
A:poly (A) tail B:stop codon C:CCA-OH D:cap sequence E:initiation codon
答案:cap sequence
A:Various tRNA are present in the cell. B:tRNA is usually composed of 70-90 nucleotides. C:Anticodon loop contains the anticodon that is composed of three bases CCA. D:tRNA contains rare bases. E:The secondary structure of tRNA is cloverleaf structure.
A:It is usually single-stranded molecule. B:tRNA contains more rare bases than other RNAs. C:mRNA contains the genetic codon. D:rRNA is the place for protein synthesis. E:RNA contains regional double-stranded structure.
A:Higher AT content, higher Tm B:Smaller nucleic acid, larger range of Tm. C:The nucleic acid with higher D:Higher purity of nucleic acid, larger range of Tm E:is usually RNA F:Higher GC content，higher Tm.
A:polyA sequence B:double-stranded helix C:inverted L shape D:regional double-stranded helix E:supercoil
A:polyA sequence B:supercoil C:double-stranded helix D:inverted L shape E:regional double-stranded helix
A:polyA sequence B:supercoil C:inverted L shape D:double-stranded helix E:regional double-stranded helix
A:hnRNA B:tRNA C:mRNA D:siRNA E:rRNA
A:siRNA B:mRNA C:tRNA D:hnRNA E:rRNA
A:DNA denaturation B:Dissociation of nucleic acid C:Hybridization D:DNA renaturation E:Hydrolysis of nucleic acid
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