PBS Unit 1.1 Test

Which of the following BEST describes the information that should be included on a crime scene sketch?

• Title, Name of victim, Time of day
• Legend, Key, Scale
• Location, Ambient temperature, Key
• Legend, Ambient temperature, Scale

A crime scene investigator is called to the scene of a mysterious death. Which of the following is NOT one of the initial steps used to process a crime scene?

• Interview witnesses to establish a theory of the case.
• Examine the crime scene and mark any evidence
• Sketch a diagram of the crime scene
• Perform DNA analysis on all biological samples

How do restriction enzymes cut DNA?

• Restriction enzymes use lasers to cut DNA into pieces
• Restriction enzymes cut DNA at specific base sequences

• Restriction enzymes separate fragments of DNA by size
• Restriction enzymes do not cut DNA

Choose the phrase below that BEST describes the structure of DNA.

• DNA is a double-strand of nucleotides
• DNA is made up of a double-strand of proteins twisted into a helix
• DNA is a double-strand of nucleotides twisted into a helix
• DNA is a single strand of nucleotides

The outermost layer of hair is called the

• Keratin
• Cortex
• Cuticle
• Medulla

Blood typing is a way to positively identify someone from a crime scene.

• True
• False

Investigators collected the following evidence from a crime scene:

Type A blood

Dyed brown hair

Whorl pattern fingerprint

Shoe print Suspect #1 was found to have Type A blood, dyed brown hair, low similarities in fingerprint match and hiking shoes. Which of the following could be used to potentially eliminate suspect #1 as a suspect?

• The fingerprint
• Blood type A
• Dyed brown hair

There are 2 types of nitrogenous bases that make up DNA. What are they called?

• acids and bases
• nucleotides and amino acids
• adenine and cytosine
• purines and pyrimidines

This is the most common presumptive blood test done in the lab. This test uses a compound known as phenolphthalein, which reacts with the iron in hemoglobin (It is the test we did)

• Leukocrystal violet
• Luminol
• Kastle-Meyer
• ABO Blood test

When blood clumps or forms visible islands in the still liquid plasma, it is called

• Binding
• Agglutination
• Antigenosis
• Plasmolysis