Of the Protein-Coding Genes in Eukaryotes

question 31

Multiple Choice

Of the protein-coding genes in eukaryotes,

• A) about half exist in one copy in somatic cells.
• B) almost all are members of gene families.
• C) about half are present in two copies in a somatic cell.
• D) most are pseudogenes.
• E) most are not transcribed.

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Definitions:

Specialized Cell

A cell that is uniquely suited to perform a particular function, such as a neuron in the nervous system or a red blood cell in the circulatory system.

Nervous System

The part of an organism that coordinates its actions by transmitting signals to and from different parts of its body.

Neuron

A specialized cell transmitting nerve impulses; the basic building block of the nervous system.

Cell Membrane

A biological membrane that separates the interior of all cells from the outside environment, controlling the passage of substances in and out of the cell.