If Cells of an Individual Contain the Same Set of Genes

question 15

Multiple Choice

If cells of an individual contain the same set of genes, how do these cells become different from each other during development?

• A) Different cell type-specific regulatory elements in DNA are created during development.
• B) Different cell type-specific regulatory elements in DNA are selectively lost during development.
• C) Differences in extracellular signals received by each cell lead to differences in the types of regulatory proteins present in each cell.
• D) Differences develop in promoter sequences that lead to different signals being produced by each type of cell.

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Definitions:

HT Receptors

Protein sites located on cell membranes, primarily serotonin receptors, which are involved in transmitting signals within the brain.

DA Receptors

Dopamine receptors, which are a class of G protein-coupled receptors that are targeted by dopamine to mediate its effects.

CRH Receptors

Proteins found in various tissues in the body that bind to corticotropin-releasing hormone, playing a key role in stress response and regulation.

Depressed Individuals

Individuals experiencing a chronic feeling of sadness or a lack of interest, which affects their day-to-day activities.