PLTW- biomedical science EOC assessment
UPDATED ACTUAL Exam Questions and
CORRECT Answers
Name 5 pieces of evidence that might be obtained at a crime scene that could help solve the
crime. - CORRECT ANSWER - finger prints, foot prints, hairs, bodily fluids, & blood
What is the difference between manner of death and cause of death? - CORRECT
ANSWER - Manner- What happened? EX. Homicide
Mechanism- How they were killed EX. Stabbing
How is time of death determined? - CORRECT ANSWER - Glacier Equation
Parts of a nucleotide - CORRECT ANSWER - 5 carbon sugar, phosphate group,
nitrogenous base
Name all 4 bases of DNA - CORRECT ANSWER - Adenine, Thymine, Cytosine, Guanine
Which base is not present in RNA? - CORRECT ANSWER - No THYMINE ( T ) it is
replaced with URACIL ( U )
What do restriction enzymes do? - CORRECT ANSWER - cut DNA at specific sites
What is the purpose of gel electrophoresis? - CORRECT ANSWER - It allows for the
separation of fragments of DNA.
What way does DNA run on the gel? - CORRECT ANSWER - Negative to positive charge
What is a dependent variable? - CORRECT ANSWER - variable that is being measured
, What is the independent variable? - CORRECT ANSWER - The variable you change
What is a control group? - CORRECT ANSWER - The group that does not receive the
experimental treatment in an experiment.
What does PCR stand for? - CORRECT ANSWER - polymerase chain reaction
What is the difference between presumptive and confirmatory tests? - CORRECT
ANSWER - Presumptive test- a test to determine if further testing should be done
Confirmatory test- a test to confirm hypothesis or idea
What is the role of platelets? - CORRECT ANSWER - Helps blood clot
What is the role of red blood cells? - CORRECT ANSWER - Carry oxygen around the
body
What is the role of white blood cells? - CORRECT ANSWER - Protection from pathogens
and micro-organisms
- Ingest pathogens
- Produce antibodies which recognise antigens on pathogens and destroy them
What is the role of plasma? - CORRECT ANSWER - transport substances around the
body- red blood cells especially
What is the role of hemoglobin? - CORRECT ANSWER - Present in RBC, carry's oxygen
around the body
What is the role of hematocrit? - CORRECT ANSWER - To determine the percentage of
RBC in the blood
UPDATED ACTUAL Exam Questions and
CORRECT Answers
Name 5 pieces of evidence that might be obtained at a crime scene that could help solve the
crime. - CORRECT ANSWER - finger prints, foot prints, hairs, bodily fluids, & blood
What is the difference between manner of death and cause of death? - CORRECT
ANSWER - Manner- What happened? EX. Homicide
Mechanism- How they were killed EX. Stabbing
How is time of death determined? - CORRECT ANSWER - Glacier Equation
Parts of a nucleotide - CORRECT ANSWER - 5 carbon sugar, phosphate group,
nitrogenous base
Name all 4 bases of DNA - CORRECT ANSWER - Adenine, Thymine, Cytosine, Guanine
Which base is not present in RNA? - CORRECT ANSWER - No THYMINE ( T ) it is
replaced with URACIL ( U )
What do restriction enzymes do? - CORRECT ANSWER - cut DNA at specific sites
What is the purpose of gel electrophoresis? - CORRECT ANSWER - It allows for the
separation of fragments of DNA.
What way does DNA run on the gel? - CORRECT ANSWER - Negative to positive charge
What is a dependent variable? - CORRECT ANSWER - variable that is being measured
, What is the independent variable? - CORRECT ANSWER - The variable you change
What is a control group? - CORRECT ANSWER - The group that does not receive the
experimental treatment in an experiment.
What does PCR stand for? - CORRECT ANSWER - polymerase chain reaction
What is the difference between presumptive and confirmatory tests? - CORRECT
ANSWER - Presumptive test- a test to determine if further testing should be done
Confirmatory test- a test to confirm hypothesis or idea
What is the role of platelets? - CORRECT ANSWER - Helps blood clot
What is the role of red blood cells? - CORRECT ANSWER - Carry oxygen around the
body
What is the role of white blood cells? - CORRECT ANSWER - Protection from pathogens
and micro-organisms
- Ingest pathogens
- Produce antibodies which recognise antigens on pathogens and destroy them
What is the role of plasma? - CORRECT ANSWER - transport substances around the
body- red blood cells especially
What is the role of hemoglobin? - CORRECT ANSWER - Present in RBC, carry's oxygen
around the body
What is the role of hematocrit? - CORRECT ANSWER - To determine the percentage of
RBC in the blood
