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Name the tissue. Name the structure indicated by the white arrow. Identify the specific region of this cell indicated by the red arrow. Briefly explain its function
A directional (forced) clonning is planned using the restriction enzymes Pst1 and Sph1 to generate incompatible termini in the vector pUC18. Note that enzymes have different optimum buffer requirements and must be digested sequentially rather than simultaneously. The plasmid is first digested with Sph1, purified on a column, eluted and resuspended in Pst1 buffer and digested with Ps
Which one of the following statements about mRNA transcription and processing in eukaryotes is incorrect?
1. A methylguanosine cap is added to the 5' end of each transcript. 2. All transcription occurs in the nucleus. 3. A string of adenosines are added to the 3' end of the primary transcript by the same RNA polymerase that transc
