Which of the following is a scientific concern related to creating genetically modified crops?
A) Herbicide resistance may spread to weedy species.
B) Genetically modified crops cannot survive without the addition of great amounts of fertilizer to the soil.
C) The monetary costs of growing genetically modified plants are significantly greater than traditional breeding techniques.
D) Genetically modified plants are less stable and may revert back to parental genotypes.
A
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The purple sulfur and green sulfur bacteria
A. both use hydrogen sulfide as a source of electrons. B. generate oxygen. C. preferentially use organic molecules as an electron source. D. both lack gas vesicles.
Hardy-Weinberg calculations are based on
A) the binomial expansion. B) the quadratic equation. C) the Pythagorean theorem. D) comparing DNA sequences.
How does the location of the yolk in an egg influence its development?
What will be an ideal response?
One way in which an enzyme can lower the activation energy required for a reaction is to bind the substrate(s) and distort its structure so that the substrate more closely resembles the transition state of the reaction
This mechanism will be facilitated if the shape and chemical properties of the enzyme's active site are more complementary to the transition state than to the undistorted substrate; in other words, if the enzyme were to have a higher affinity for the transition state than for the substrate. Knowing this, your friend looked in an organic chemistry textbook to identify a stable chemical that closely resembles the transition state of a reaction that converts X into Y. She generated an antibody against this transition-state analog and mixed the antibody with chemical X. What do you think might happen?