The Nucleolar Organizer Is a Part of a Specific Chromosome

question 38

Multiple Choice

The nucleolar organizer is a part of a specific chromosome that directs the synthesis of

• A)transfer RNA (tRNA).
• B)ribosomal RNA (rRNA).
• C)messenger RNA (mRNA).
• D)heterogeneous nuclear RNA (hnRNA).

---

Definitions:

Neuron

An exclusive cell type that communicates through nerve impulses; identified as a neuron.

Absolute Refractory Period

A time period immediately following an action potential during which a neuron is incapable of firing a second action potential, no matter the strength of the stimulation.

Sodium Ions

Electrically charged particles of sodium, essential in physiological processes such as nerve impulse transmission and muscle contraction.

Neuron

A particular cell dedicated to transmitting signals in the nervous system; a neuron.