Question: In the silkmoth, a single gene encodes the protein that is the major constituent of the cocoon. …
Show transcribed image text In the silkmoth, a single gene encodes the protein that is the major constituent of the cocoon. The mRNA encoding this protein was isolated from silkmoth larvae and hybridized with silkmoth DNA. The following "electron micrograph" was obtained: (1) Explain the loops in the DNA strand. (2) Show on the diagram which side of the mRNA is its 5 and which is its 3' end. Using one brief sentence to explain how one can tell. A mutant silkmoth was isolated that cannot make the cocoon protein. The mutant makes mRNA encoding the protein at the same concentration as the wild type, but the mRNA molecules are slightly longer than usual. An electron micrograph of the mRNA-DNA hybridization with mRNA from the mutant organism shows the following: Suggest a possible explanation for the nature of the mutation.
In the silkmoth, a single gene encodes the protein that is the major constituent of the cocoon. The mRNA encoding this protein was isolated from silkmoth larvae and hybridized with silkmoth DNA. The following "electron micrograph" was obtained: (1) Explain the loops in the DNA strand. (2) Show on the diagram which side of the mRNA is its 5 and which is its 3' end. Using one brief sentence to explain how one can tell. A mutant silkmoth was isolated that cannot make the cocoon protein. The mutant makes mRNA encoding the protein at the same concentration as the wild type, but the mRNA molecules are slightly longer than usual. An electron micrograph of the mRNA-DNA hybridization with mRNA from the mutant organism shows the following: Suggest a possible explanation for the nature of the mutation.
