Which of the Following Is a Difference Between Class I

question 75

Multiple Choice

Which of the following is a difference between class I and class II major histocompatibility complex (MHC) proteins?

• A) Class I MHC proteins can be found on most cell types, whereas both class I and II MHC proteins are found on the antigen-presenting cells of the immune system
• B) Class I MHC proteins are added to antigens in the cytoplasm, whereas class II proteins are added to antigens in the Golgi apparatus.
• C) Class I MHC proteins signal the immune system to activate the cell displaying the message, whereas class II proteins signal the immune system to destroy a particular cell.
• D) Class I and class II MHC proteins have the same basic role, but individuals with particularly strong immune systems will have both types, whereas most individuals have just one or the other.

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Definitions:

Fetal Period

The period in prenatal development from nine weeks after conception until birth, when the brain continues developing, bodily structures are refined, and the fetus grows in length and weight and accumulates fat in preparation for birth.

Germinal Period

The initial two weeks of prenatal development following conception, characterized by rapid cell division and attachment to the uterine wall.

Embryonic Period

The stage of prenatal development from approximately the second to the eighth week after fertilization, during which major organs and structures within the embryo begin to develop.

Lungs

The pair of respiratory organs in the chest of humans and many animals, responsible for the exchange of oxygen and carbon dioxide.