Virus Infections Induce Production of Interferons That Act on Infected

question 5

Multiple Choice

Virus infections induce production of interferons that act on infected cells to enhance their recognition by CD8 cytotoxic T cells. To counter these mechanisms, viruses often encode proteins that interfere with antigen processing and presentation. In an experiment, cells infected with Virus X are treated with interferon and compared with uninfected cells treated with interferon. Proteasomes are isolated from the two cell populations and their enzymatic activities are compared. The data in Figure show the amino acid preferences for cleavage of peptides by the two samples of proteasomes.
Based on these data, Virus X most likely encodes a protein that interferes with:

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Definitions:

Midwife

An individual who helps women in childbirth.

Oxytocin

A hormone and neurotransmitter that plays an important role in the social bonding, sexual reproduction, and the period around childbirth.

Pituitary Gland

The body’s “master gland,” which is located in the lower central part of the brain and which secretes many hormones essential to development, such as oxytocin, prolactin, and growth hormone.

Adrenal Glands

Endocrine glands located above the kidneys, responsible for producing critical hormones, including adrenaline and cortisol, that regulate stress responses and metabolism.