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Which of the following is not an action performed by the first responder at a crime scene?

Demonstrative evidence may be all of the following except:

Gel electrophoresis is used to separate DNA fragments based on their movement through a gelatin stationary phase as electrical currents are applied.

The order of light passing through a spectrophotometer is as follows:

All evidence must be packaged in:

Only the jury can serve as the trier of fact in criminal trials. 

Which of the following is not true regarding gas chromatography?

Discerning what is/is not evidence to be collected at a crime scene can be influenced by the type of crime allegedly committed. 

Which of the following is not true regarding gas chromatography?

Forensic science labs often use mass spectrometry as a detector for gas chromatography.