Use the Paragraph and Accompanying Figure to Answer the Following

question 32

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.

-In an HIV-infected cell producing HIV virus particles, the viral glycoprotein is expressed on the plasma membrane. How do the viral glycoproteins get to the plasma membrane? They are synthesized ________.

• A) on ribosomes on the plasma membrane
• B) by ribosomes in the rough ER and arrive at the plasma membrane in the membrane of secretory vesicles
• C) on free cytoplasmic ribosomes and then inserted into the plasma membrane
• D) by ribosomes in the rough ER, secreted from the cell, and inserted into the plasma membrane from the outside

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Definitions:

Mentoring

A relationship in which a more experienced or knowledgeable person helps guide a less experienced or less knowledgeable person.

Person Receiving Mentoring

An individual who is guided, advised, or supported by a more experienced person in a mentorship relationship.

Mentoring Benefits

The advantages gained from a mentoring relationship, including personal and professional growth, skill development, and increased networking opportunities.

Well Prepared

The state of being adequately equipped or ready for a specific task or challenge through thorough planning and organization.