DNA EXTRACTION

The type of cells today we are extracting are cheek cells.  What do scientists call this:

• mandibular swab
• serological swab
• buccal swab
• salivary swab

Isolating DNA is important because

• it can be used for genetic testing
• used to identify bodies
• used to analyze forensic evidence
• all of these

What is the length of a typical DNA molecule from a cell? 

• 5 cm
• 2 meters
• 1 meter
• 1 inch

In the lab, where is the swab placed after collection

• a specialized tube
• paper bag
• box
• plastic bag

What is the purpose of the lysis/detergent solution?

• dehydrate the DNA
• clean the DNA
• burst open the cells to release DNA
• separate DNA from proteins

What is the function of the salt solution?

• dehydrate the DNA
• release the DNA
• isolate the DNA
• separate DNA from proteins

What is the purpose of the alcohol?

• dehydrate and isolate DNA
• release DNA from cells
• separate it from proteins
• sterilize DNA

What section of the crime lab would extract DNA

• biology
• trace
• chemistry
• any of these could do it

If an  officer collect a DNA swab from a suspect, how is it packaged properly?

• in a small box
• labeled as biohazard
• initials and date half on half off the tape
• all of these

What type of DNA are we extracting today?

• mitochondrial DNA 
• nuclear DNA