Three Major Cell Types, Dendritic Cells, Macrophages, and B Cells

question 20

Multiple Choice

Three major cell types, dendritic cells, macrophages, and B cells, present peptides bound to MHC class II molecules for recognition by CD4 T cells. In general, these peptides are derived from proteins or pathogens taken up by the cell by endocytosis, phagocytosis, or macropinocytosis. Based on these pathways of antigen uptake, some of the enzymes that degrade proteins to generate peptides for MHC class II presentation are:

• A) Ubiquitin ligases that tag proteins for degradation by the proteasome
• B) ATP transporter proteins that deliver endocytic proteins into the cytosol for degradation
• C) Cysteine proteases like cathepsins that function at acidic pH
• D) The lysosomal thiol reductase found in the endosomes
• E) The lysosome-associated membrane trafficking protein, LAMP-2

Understand the financial impact of disposing of assets, including recognizing gains or losses.

Recognize the importance of residual value and useful life in calculating depreciation.

Comprehend the treatment of natural resources and the concept of depletion.

Understand the concept of intangible assets and their amortization.

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Definitions:

Land Account

An account used in accounting to track the investment in land owned by an entity, including the costs associated with acquiring the land.

Adjustment Necessary

Indicates that changes must be made to financial records or statements to correct inaccuracies or account for new information.

Equipment Account

An account in financial records that tracks the cost and accumulated depreciation of equipment owned by a business.

Unamortized Patent

The portion of a patent's cost that has not yet been expensed through amortization.