Which of the following would likely not be one of the criteria for strain improvement:
a) Tolerance of high levels of carbon dioxide
b) Tolerance of high salt concentrations
c) Improved fatty acid synthesis to facilitate better glucose secretion during growth on tryptophan.
d) Improved product secretion
Genetically modified plants:
Genetically modified plants (GMO plants) are plants which have been engineered to have different properties than regular plants due to the alteration of their genes. This process allows for the development of more versatile crop varieties, taking further techniques such as crop breeding that have existed since humans started agriculture.
Answer and Explanation:
In any new crop strain, there must be a significant improvement over the previous iteration to justify the adaptation in a new organism. All of traits b, c, d show substantial improvement in how the crop reacts to more harsh environments, and are thus extremely desirable traits. However, trait a does not make any sense: plants use carbon dioxide for photosynthesis, and all have a very good ability to tolerate higher carbon dioxide levels (in fact, photosynthesis rate increases under higher carbon dioxide concentrations). Hence, the correct option is a.
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Learn more about this topic:
from Biology 102: Basic GeneticsChapter 8 / Lesson 11