Why would a genetic engineer prefer to insert a gene into the sporophyte generation as opposed to the gametophyte generation?
What will be an ideal response?
If a gene is inserted into the gametophyte generation there is no guarantee that the desirable characteristic will be expressed following fertilization. A greater probability of success would be expected if the gene was inserted directly into the sporophyte. The sporophyte has the plant structure where the gene expression will take place (fruits, flowers, leaves, etc.).
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Enzymes function to:
A. react with other enzymes to form a product. B. catalyze chemical reactions. C. transport molecules and ions across membranes. D. regulate messages between cells.
What role does each of the following molecules play in protein synthesis?
a. DNA b. mRNA c. tRNA d. Amino Acids
As part of your research project, you travel to an island to learn more about the habitats and relationships of flies, spiders, and centipedes. You and your assistant plot out five different areas on the island and count the numbers of flies, spiders, and centipedes living in each plot. Your results show the following: Plot Flies Spiders Centipedes1300254242617103147152147397805791393The hypothesis that closely matches the data provided is:
A. herbivorous insects survive best on islands where spiders and centipedes live. B. herbivorous insects and spider populations are decreased by centipedes. C. herbivorous insects feed on spiders and centipedes. D. spiders are the top predators on all islands.
What is the significance of the industrial practice of waiting for cultures to enter the stationary phase of growth before harvest?
A) The cells are at peak metabolic activity. B) Secondary metabolites are often the desired product, and are only produced in stationary phase. C) The desired primary metabolites are produced in stationary phase. D) Potential toxins from log phase growth have been depleted. E) An optimal combination of primary and secondary metabolites is being produced.