With Advancing Age, the Immune System

question 72

Multiple Choice

With advancing age, the immune system

• A) becomes more effective at combating disease.
• B) remains the same and is not affected by the aging process.
• C) has alternating periods of efficacy.
• D) becomes less effective at combating disease.
• E) becomes more responsive to antigens.

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Definitions:

Gene Expression

The process by which information from a gene is used in the synthesis of a functional gene product, often proteins, which can affect the phenotype of the organism.

Operon

A group of genes in prokaryotes that are transcribed together and regulated by a single promoter and operator sequence, facilitating coordinated expression of genes with related functions.

Transcription

The process of copying a segment of DNA into RNA, particularly messenger RNA, paving the way for protein synthesis in cells.

Phosphorylation

A biochemical process that involves the addition of a phosphate group to a molecule, such as a protein, which can alter the molecule's function.