Lymphocytes Are Isolated and Labeled with Radioactive Isotopes

question 81

Multiple Choice

Lymphocytes are isolated and labeled with radioactive isotopes.They are then exposed to frozen tissue sections of a lymphoid organ.What happens?

• A)The lymphocytes bind uniformly to the sections.
• B)The lymphocytes bind to each other.
• C)The lymphocytes selectively adhere to the endothelial lining of venules in peripheral lymph nodes.
• D)The lymphocytes selectively adhere to the endothelial lining of arterioles in peripheral lymph nodes.
• E)The lymphocytes do not stick to the sections.

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Definitions:

Genetic Material

The molecules (mainly DNA or RNA) within cells that carry the genetic instructions for the development, functioning, growth, and reproduction of all known organisms.

Zygote

The initial cell formed when a sperm cell fertilizes an egg cell, containing the genetic information necessary for the development of a new organism.

Chromosomes

Structures located in the nucleus of cells, made up of DNA and protein, that contain genes, the basic units of heredity.

Pairs

Groupings of two related or associated items, often used to study comparisons or contrasts.