第六章单元测试
- We usually call codons contains 5 characteristics, among which the degeneracy of the genetic code means?（ ）
- A gene has the base sequence ACCCGTGCACGT. If the A at the beginning of the sequence is deleted, what will be happen?（ ）
- Which bond is an amino acid linked to the tRNA?（ ）
- The energy required for the step of peptide chain elongation in prokaryotic is? （ ）
- The Shine-Dalgarno sequence is found on the ________. （ ）
- Among the following factors, which one could deliver the aminoacyl-tRNA to the A site of ribosome?（ ）
- The specific sequence on the N terminus of secretory protein is called （ ）
- Which protein factor has the translocase enzyme activity in eukaryotes:（ ）
- Which of the classes of RNA molecules is/are part of the process of
translation?（ ） - Messenger RNA (mRNA) is made by a process called translation.（ ）
- Polypeptides unfold in the cytoplasm of a cell to form a functional protein.（ ）
- The genetic code has four letters, A, T, G, and C. （ ）
A:Most amino acids have more than one set of codons B:A triplet codon can lack or insert a purine or pyrimidine base C:There are many rare bases in the code which translate rare amino acids D:At least nine codons apply to more than one amino acid
答案:Most amino acids have more than one set of codons
A:RNA polymerase will insert the correct codon, and a normal protein will be produced B:Only one amino acid coded for in that codon will be changed C:All of the codons after A point will be changed D:RNA polymerase will skip that codon, and the other codons will be read normally.
A:ester B:glycosidic C:high energy D:phosphodiester
A:UTP and ATP B:ATP and GTP C:CTP and GTP D:only GTP
A:small ribosomal subunit B:large ribosomal subunit C:mRNA D:initiator tRNA
A:EF-Tu B:IF-2 C:EF-G D:EF-Ts
A:signal peptide B:secretory peptide C:signal sequence D:signal petidase
A:eIF-4B protein factor B:eRF protein factor C:eEF-2 protein factor D:eIF-2 protein factor
A:Transfer RNA B:Small nuclear RNA C:Ribosomal RNA D:Messenger RNA
A:对 B:错
A:对 B:错
A:对 B:错
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