DNA - SUPA Forensics Exam | Verified Exam Questions and Answers |
Latest Updated Study Material 2026
Question:
Less than what percent of our DNA is unique?
Answer:
1
Question:
What are the nitrogenous bases?
Answer:
Adenine, Thymine, Guanine,
Cytosine
Question:
Only cells in the body that have nuclei and therefore DNA?
Answer:
White
blood cells
Question:
Biological sources of evidence
Answer:
Roots of hair, bone marrow, teeth,
epithelial cells
Question:
What are epithelial cells?
Answer:
tightly packed cells in direct contact
with the external environment - skin, saliva, cheek
Question:
2 types of DNA and explain each
, Answer:
nuclear - approximately 3
billion, base pairs used for STR testing
Question:
mitochondrial - 16,600 base pairs, used for mtDNA testing, consequences: too expensive and can
only get DNA from moms side
Why can you only get mitochondrial DNA from mother's side
Answer:
Sperm does not penetrate the egg cell during fertilization leaving only the
mothers mitochondria in the fertilized cell
Question:
DNA known sample vs crime scene in terms of being taken and tested
Answer:
Known - similar to a doctors office - taken and tested in sterile conditions
Question:
crime scene - not taken in sterile conditions but tested in sterile conditions
Types of DNA evidence
Answer:
Clothing, weapons, chewing gum,
cigarette butts, bottles, stamps/envelopes, fingerprints, etc.
Question:
What is short tandem repeat?
Answer:
STR is sequences of a few
nucleotides that are repeated in noncoding regions of DNA, varies from person to person - not all
the same repeats for everyone
Question:
G A T C are repeated consecutively
What do strs not use?
Latest Updated Study Material 2026
Question:
Less than what percent of our DNA is unique?
Answer:
1
Question:
What are the nitrogenous bases?
Answer:
Adenine, Thymine, Guanine,
Cytosine
Question:
Only cells in the body that have nuclei and therefore DNA?
Answer:
White
blood cells
Question:
Biological sources of evidence
Answer:
Roots of hair, bone marrow, teeth,
epithelial cells
Question:
What are epithelial cells?
Answer:
tightly packed cells in direct contact
with the external environment - skin, saliva, cheek
Question:
2 types of DNA and explain each
, Answer:
nuclear - approximately 3
billion, base pairs used for STR testing
Question:
mitochondrial - 16,600 base pairs, used for mtDNA testing, consequences: too expensive and can
only get DNA from moms side
Why can you only get mitochondrial DNA from mother's side
Answer:
Sperm does not penetrate the egg cell during fertilization leaving only the
mothers mitochondria in the fertilized cell
Question:
DNA known sample vs crime scene in terms of being taken and tested
Answer:
Known - similar to a doctors office - taken and tested in sterile conditions
Question:
crime scene - not taken in sterile conditions but tested in sterile conditions
Types of DNA evidence
Answer:
Clothing, weapons, chewing gum,
cigarette butts, bottles, stamps/envelopes, fingerprints, etc.
Question:
What is short tandem repeat?
Answer:
STR is sequences of a few
nucleotides that are repeated in noncoding regions of DNA, varies from person to person - not all
the same repeats for everyone
Question:
G A T C are repeated consecutively
What do strs not use?
