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Use the Paragraph and Accompanying Figure to Answer the Following

question 34

Multiple Choice

Use the paragraph and accompanying figure to answer the following questions.
Human immunodeficiency virus (HIV) infects cells that have both CD4 and CCR5 cell surface molecules. The viral nucleic acid molecules are enclosed in a protein capsid, and the protein capsid is itself contained inside an envelope consisting of a lipid bilayer membrane and viral glycoproteins. One hypothesis for viral entry into cells is that binding of HIV membrane glycoproteins to CD4 and CCR5 initiates fusion of the HIV membrane with the plasma membrane, releasing the viral capsid into the cytoplasm. An alternative hypothesis is that HIV gains entry into the cell via receptor-mediated endocytosis, and membrane fusion occurs in the endocytotic vesicle. To test these alternative hypotheses for HIV entry, researchers labeled the lipids on the HIV membrane with a red fluorescent dye.

-What would be observed by live-cell fluorescence microscopy immediately after HIV entry if HIV is endocytosed first, and then later fuses with the endocytotic vesicle membrane?

Definitions:

Consumer Goods

Products and services that are consumed by individuals or households to satisfy their needs or wants.

Producing

The process of creating, manufacturing, or constructing goods and services for consumption or use.

Economic Growth

An increase in the production of goods and services in an economy over a period, indicating improving national prosperity.

Production Possibilities Frontier

A curve depicting all maximum output possibilities for two goods, given a set of inputs resources and technology.