What Is the Diameter of the Tip of a Microelectrode

question 25

Multiple Choice

What is the diameter of the tip of a microelectrode?

• A) 1-3 micrometers
• B) 1 millimeter
• C) 10 micrometers
• D) 100 micrometers
• E) less than 0.5 micrometers

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Definitions:

Centromere

A specialized constricted region of a chromatid; contains the kinetochore. In cells at prophase and metaphase, sister chromatids are joined in the vicinity of their centromeres.

Nucleosomes

Structural units of a chromosome, consisting of a segment of DNA wound around a core of histone proteins.

Histone Proteins

Proteins found in the nucleus of eukaryotic cells that package and order the DNA into structural units called nucleosomes.

Eukaryotic DNA

The genetic material contained within the nucleus of eukaryotic cells, characterized by its linear chromosomes.