What Are Desmosomes

question 101

Multiple Choice

What are desmosomes?

• A) low-resistance channel-like passages that let ions travel between the interiors of adjacent cells
• B) cell organelles that contain enzymes for digesting cellular debris and foreign microbes
• C) cellular organelles that transcribe RNA into DNA
• D) membrane-bound vesicles that pinch off from the plasma membrane and enter the cell
• E) dense plaques of proteins that maintain firm attachments between adjacent cells

---

Definitions:

CDNA Library

A collection of complementary DNA (cDNA) clones synthesized from the messenger RNA of an organism, representing a subset of the genes expressed in the tissue from which the RNA was extracted.

Introns

Non-coding sections of DNA within a gene that are removed during RNA processing before translation into proteins.

Transgenic Organisms

Organisms that have been genetically modified to contain DNA from an external species.

Gene Expression

The process by which information from a gene is used to synthesize a functional gene product, often a protein.