How might L1 retrotransposons be useful as a potential gene therapy agent? What are the problems with using this strategy for gene therapy?
What will be an ideal response?
Because the retrotransposons can be inserted into the genome, you could theoretically add a missing gene to the retrotransposon sequence and allow the cell to insert the gene into a chromosome, hopefully restoring functional gene expression to the cell. You have little control over where the gene will be inserted, so it may disrupt the function of another gene in the process. Moreover, just because it is inserted into the genome is no guarantee it will be transcribed and translated properly, because essential gene control elements such as promoters and enhancers will not be in the same location relative to the gene.
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To identify the optimal phylogenetic tree from multiple potential trees, many systematists use the ____, which states
that the simplest plausible explanation of any phenomenon is the best.
a. maximum likelihood method b. principle of parsimony c. genetic distance method d. gradual phyletic hypothesis e. punctuated equilibrium hypothesis
Carbon and hydrogen make up many biologically important molecules. Carbon has an electronegativity of 2.55, whereas hydrogen has an electronegativity of 2.2. Based on the electronegativity difference between the atoms, the carbon and hydrogens shown here have just formed
A. an ionic bond.
B. a hydrogen bond.
C. a polar covalent bond.
D. a nonpolar covalent bond.
E. an element.
"Brush border" refers to ________ found on the surface of the epithelial cells of the small intestine
Fill in the blank(s) with correct word
Define rugae
What will be an ideal response?