Question 8. Assuming that the differences in moth density are due to toxicity differences, which of the different strategies was most successful at impeding the evolution of resistance in the moths between generation 12 and generation 24?
Enzyme kinetics
In biochemistry, enzymes are proteins that act as biological catalysts. Catalysis is the addition of a catalyst to a chemical reaction to speed up the pace of the reaction. Catalysis can be categorized as either homogeneous or heterogeneous, depending on whether the catalysts are distributed in the same phase as that of the reactants. Enzymes are an essential part of the cell because, without them, many organic processes would slow down and thus will affect the processes that are important for cell survival and sustenance.
Regulation of Enzymes
A substance that acts as a catalyst to regulate the reaction rate in the living organism's metabolic pathways without itself getting altered is an enzyme. Most of the biological reactions and metabolic pathways in the living systems are carried out by enzymes. They are specific for their works and work in particular conditions. It maintains the best possible rate of reaction in the most stable state. The enzymes have distinct properties as they can proceed with the reaction in any direction, their particular binding sites, pH specificity, temperature specificity required in very few amounts.
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Larvae and pupae per Bt plant
100
www
-- Mosaic, Cry1Ac plant
--0-- Mosaic, Cry1C plant
-- Sequential, Cry1Ac plant
--- Sequential, Cry1C plant
Pyramid, two-gene plant
I
1
1
1
3
6
9
12
15
18 21 24
Generation
Figure 1. The figure above shows the average numbers of larvae and pupae of the
moth found per Bt plant in each of the treatments. Note the logarithmic scale on the
y-axis.
Question 8. Assuming that the differences in moth density are due to toxicity
differences, which of the different strategies was most successful at impeding the
evolution of resistance in the moths between generation 12 and generation 24?
6
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