Express the Set in Interval Notation $( - \infty , 8 )$

question 53

Multiple Choice

Express the set in interval notation.

• A) \(( - \infty , 8 )\)
• B) \([ 8,9 )\)
• C) \(( 8,9 ]\)
• D) \([ 8,9 ]\)

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Definitions:

Signaling Pathway

Complex networks of molecules that transmit information from external stimuli to a cell's interior, triggering specific cellular responses.

Phosphodiesterase

An enzyme that plays a critical role in cellular signaling by breaking down phosphodiester bonds within cyclic nucleotides like cAMP and cGMP.

cAMP

A second messenger important in many biological processes, known formally as cyclic adenosine monophosphate.

Phosphorylated Protein

A protein that has undergone the addition of a phosphate group, which can affect the protein's function and activity.