We Learned in Chapter 5 That the Benefit of Having

question 85

Essay

We learned in Chapter 5 that the benefit of having and expressing multiple MHC class I and class II genes is that it increases the number and variety of pathogen-derived peptide antigens that can potentially be presented to T cells.If more is better,then why has natural selection not favored the evolution of more than three genes each for MHC class I and MHC class II?

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Definitions:

Oat Bran

The outer layer of the oat grain, rich in dietary fiber and nutrients, often consumed for its health benefits, such as lowering cholesterol.

Cholesterol

A type of fat found in the blood that is necessary for building cells and producing certain hormones, but high levels can increase the risk of heart disease.

Rightward Shift

In economics, a graphical representation indicating an increase in supply or demand in a market, moving the curve to the right.

Tax Reduction

The act of decreasing the rates or amounts of taxes imposed by a government, often with the aim of stimulating economic growth or providing relief to taxpayers.