Charcoal Found Under a Stone at Stonehenge, England, Has a Carbon-14

question 9

Multiple Choice

Charcoal found under a stone at Stonehenge, England, has a carbon-14 activity that is 0.60 that of new wood. How old is the charcoal (The half-life of carbon-14 is 5,730 years.)

• A) Less than 5,730 yr
• B) Between 5,730 and 11,460 yr
• C) Between 11,460 and 17,190 yr
• D) More than 17,190 yr

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Definitions:

Operon

A functional unit of DNA containing a group of genes controlled by a single promoter, used by prokaryotes to regulate gene expression efficiently.

Structural Genes

Genes that code for proteins which serve as building blocks for cells and tissues or operate in metabolic or physiological processes.

Regulatory Sequences

Segments of DNA that are involved in controlling the activity of genes, including when, where, and how much of a gene product is made.

Constitutive

Expressed continuously under normal physiological conditions, not subject to regulation by environmental conditions.