Creepy Crime Scenes
True or false? Blood samples can be refrigerated after being collected and stored for a short amount of time.
True
Tiny patterns on your fingers that are unique to each person
Fingerprints
This reagent turns purplish or black in the presence of starch.
Iodine
Tangible items like fingerprints, blood, and weapons that can directly link a suspect to a crime scene
Physical evidence
This molecule contains an organism's genetic instructions and is often analyzed in forensic labs.
DNA
What does a forensic artist do?
This type of evidence includes small pieces of hair, fiber, or dust that can link a person to a crime scene.
Trace evidence
Benedict's solution tests for this type of carbohydrate.
Statements made by witnesses, experts, or even confessions that describe what was seen or known in a haunted crime scene
Testimonial evidence
Gel electrophoresis separates DNA fragments based on this property.
Contamination
True or false? It is impossible to distinguish between human and animal hairs under a microscope, unless given a reference hair sample.
False
The Biuret test detects this macromolecule, a polymer made of amino acids.
Protein
A terrified witness repots seeing a hooded figure carrying a strange object in the foggy graveyard. Statements like this are examples of this type of evidence.
Testimonial
What are the four DNA nucleotides?
A, C, T, and G
Evidence is collected in paper bags rather than plastic. Why is this?
To prevent mold and moisture buildup
A simple technique used to obtain trace evidence from surfaces (Hint: Our guest speaker used this technique to examine the trace evidence from her chair.)
Tape lift
Sudan IV is used to detect these molecules.
Lipids/fats
A pumpkin smashed near a haunted alley is linked to a suspect's muddy boots found at their home. This type of evidence suggests their involvement without directly proving it.
Circumstantial evidence
The tiny volumes of DNA and buffer solution are loaded into the gel wells using this precise tool.
Micropipette
What is cheiloscopy?
The examination of lip prints
The principle that every contact leaves a trace is named after this French scientist.
Locard
You are testing Halloween candy for different biomolecules. A gummy worm tests positive with Benedict's, but not with iodine. This means it contains mostly which type of biomolecule?
Simple sugars/simple carbohydrates
During a haunted mansion investigation, a witness claims they saw a figure fleeing. Over the course of the investigation, officials also find receipts online showing that the suspect purchased items matching those found at the crime scene the day before. This combination illustrates that testimonial evidence can be strengthened by this.
Circumstantial evidence
DNA is made up of smaller units called ___.
Nucleotides