What Is the Loss of Intensity in Decibels If an Ultrasound

question 1

Multiple Choice

What is the loss of intensity in decibels if an ultrasound beam is attenuated by 99%?

• A)1 dB
• B)10 dB
• C)20 dB
• D)99 dB

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Definitions:

Promoter

A region of DNA that initiates transcription of a particular gene, responsible for the regulation of gene expression.

Repressible Genes

Genes whose expression is decreased or stopped in response to the presence of a specific molecule, usually an end product of a metabolic pathway.

Anabolic Pathways

Metabolic pathways that construct molecules from smaller units, requiring energy, commonly associated with growth and development.

Genomic Imprinting

An epigenetic phenomenon by which certain genes are expressed in a parent-of-origin-specific manner, meaning that the expression of such genes is determined by the parent from whom the gene was inherited.