Forensic Biology Exam 3 UPDATED
QUESTIONS AND CORRECT ANSWERS
The structure of DNA can be described as a double _____ - CORRECT ANSWER helix
DNA is packaged tightly, helped by proteins called ________ - CORRECT ANSWER histones
The key difference in DNA that determines if an organism is going to be a human or a flower is the
________ _____ - CORRECT ANSWER base sequence
What is the nucleus? - CORRECT ANSWER the membrane-bound organelle where DNA is
stored in a cell
What are Y-strs? - CORRECT ANSWER short tandem repeats found on the Y chromosome.
One key characteristic of a Y-STR - CORRECT ANSWER it's passed through the paternal line
(from father to son)
What does PCR stand for? - CORRECT ANSWER Polymerase Chain Reaction
What happens to DNA during a PCR? - CORRECT ANSWER DNA is amplified to produce
multiple copies of a specific sequence
What are the building block molecules of DNA? - CORRECT ANSWER nucleotides
What are the names of the nitrogenous bases? - CORRECT ANSWER Adenine, Thymine,
Cytosine, and Guanine
What is a polymer? - CORRECT ANSWER a large molecule made up of repeating monomer
units
, What is a monomer? - CORRECT ANSWER a single molecular unit that can join to form a
polymer, such as nucleotide
What does anti-parallel mean in terms of DNA? - CORRECT ANSWER the two strands run
parallel in opposite directions
How many nucleotide base pairs do humans have according to The Innocence Project? - CORRECT
ANSWER about 3 billion nucleotide base pairs
Who were the contributing scientists in the 1950s who pioneered the work on DNA structure
(discovered the DNA double helix structure)? - CORRECT ANSWER Franklin, Watson, Crick,
and Wilkins
Who won the Nobel prize in medicine in 1962 for the discovery of the double helix structure of
DNA? - CORRECT ANSWER Watson, Crick, and Wilkins
What kind of bond do nucleotide base pairs have? - CORRECT ANSWER hydrogen bonds
Who is Erwin Chargaff? - CORRECT ANSWER a biochemist who discovered patterns in base
composition of DNA
What was one of Chargaff's findings that relates to the structure of DNA? - CORRECT
ANSWER A = T and C = G
Are DNA replication and cell division the exact same thing? - CORRECT ANSWER no, DNA
replication occurs during the S-phase of cell division
When does DNA replication occur during the cell cycle? - CORRECT ANSWER during the S-
phase
How does DNA replication support survival of a species? - CORRECT ANSWER by ensuring
that genetic information is passed to new generations
QUESTIONS AND CORRECT ANSWERS
The structure of DNA can be described as a double _____ - CORRECT ANSWER helix
DNA is packaged tightly, helped by proteins called ________ - CORRECT ANSWER histones
The key difference in DNA that determines if an organism is going to be a human or a flower is the
________ _____ - CORRECT ANSWER base sequence
What is the nucleus? - CORRECT ANSWER the membrane-bound organelle where DNA is
stored in a cell
What are Y-strs? - CORRECT ANSWER short tandem repeats found on the Y chromosome.
One key characteristic of a Y-STR - CORRECT ANSWER it's passed through the paternal line
(from father to son)
What does PCR stand for? - CORRECT ANSWER Polymerase Chain Reaction
What happens to DNA during a PCR? - CORRECT ANSWER DNA is amplified to produce
multiple copies of a specific sequence
What are the building block molecules of DNA? - CORRECT ANSWER nucleotides
What are the names of the nitrogenous bases? - CORRECT ANSWER Adenine, Thymine,
Cytosine, and Guanine
What is a polymer? - CORRECT ANSWER a large molecule made up of repeating monomer
units
, What is a monomer? - CORRECT ANSWER a single molecular unit that can join to form a
polymer, such as nucleotide
What does anti-parallel mean in terms of DNA? - CORRECT ANSWER the two strands run
parallel in opposite directions
How many nucleotide base pairs do humans have according to The Innocence Project? - CORRECT
ANSWER about 3 billion nucleotide base pairs
Who were the contributing scientists in the 1950s who pioneered the work on DNA structure
(discovered the DNA double helix structure)? - CORRECT ANSWER Franklin, Watson, Crick,
and Wilkins
Who won the Nobel prize in medicine in 1962 for the discovery of the double helix structure of
DNA? - CORRECT ANSWER Watson, Crick, and Wilkins
What kind of bond do nucleotide base pairs have? - CORRECT ANSWER hydrogen bonds
Who is Erwin Chargaff? - CORRECT ANSWER a biochemist who discovered patterns in base
composition of DNA
What was one of Chargaff's findings that relates to the structure of DNA? - CORRECT
ANSWER A = T and C = G
Are DNA replication and cell division the exact same thing? - CORRECT ANSWER no, DNA
replication occurs during the S-phase of cell division
When does DNA replication occur during the cell cycle? - CORRECT ANSWER during the S-
phase
How does DNA replication support survival of a species? - CORRECT ANSWER by ensuring
that genetic information is passed to new generations
