Choose the One Most Appropriate Answer for Each

question 29

Multiple Choice

Choose the one most appropriate answer for each.
-Barr body

• A)A condensed X chromosome
• B)Protein that combines with DNA all along its length
• C)Attaches or detaches from operator to regulate transcription
• D)Portion of the operon that binds RNA polymerase
• E)Genes that induce expression of other genes
• F)Genes controlling the development of specific body parts
• G)Mechanism of equalizing gene expression between the sexes
• H)Binding sites on DNA for regulatory proteins that increase transcription rates

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Definitions:

Insoluble Material

Substances that cannot dissolve in a solvent, such as water, remaining solid and separated from the liquid mixture.

Drinking Water Standards

Regulatory benchmarks set to ensure the safety and quality of water for human consumption.

Concentration

The amount of a given substance in a specified volume or mass of a solution or mixture.

Groundwater

Water that is found underground in the cracks and spaces in soil, sand, and rock, an important source of water for wells and springs.