Forensic DNA & Chemistry Analysis

The purpose of PCR

• cutting DNA
• creating RFLPs
• amplifying/copy DNA
• reversing the charge of DNA

How do scientists cut DNA into smaller strands?

• restriction enzymes
• scissors
• ligase
• agarose

Why do you use a new pipette tip on the micropipette every time you get a new sample?

• To avoid contaminating the other samples
• To use as many tools as you can.
• The pipette tips disappear after being used.
• None of these reasons

Which two bear species are most closely related?

• Bear 1 and Bear 2
• Bear 1 and Bear 3
• Bear 2 and Bear 3
• There’s no way to tell

Based on these results whose blood was found in the blood stain at the crime scene?

• Bob
• Sue
• John
• Lisa

Pattern of DNA fragments obtained by examining a person's unique sequence of DNA base pairs is?

• PCR
• Chromosome
• Electrophoresis
• DNA Fingerprinting

Which DNA strands move the fastest through the gel when the electricity is turned on?

• The long strands
• The short strands
• The medium strands
• They all move the same

What is the reason for putting the DNA size standard in the gel?

• To run more than one sample.
• To get the DNA sample to move through the gel.
• To get an idea of how long your DNA sample strands are.
• To make your DNA sample look more symmetric in the gel.

Mitochondrial DNA is different from nuclear DNA because

• it is inherited only from the mother
• It is inherited only from the father
• It is double helix in shape
• It is not useful in forensic science

Which statement about tandem repeats is NOT true?

• More than 30% of the human genome is composed of these repeating units.
• It is thought that they may act as spacers between the coded regions of DNA.
• More than one STR can be analyzed at once in a process called multiplexing.
• They are of no forensic interest.