PLTW Biomedical Science Semester 1
Final Review Exam
List the Steps of the Scientific Method - Correct Answers -1. Observation
2. Hypothesis
3. Prediction
4. Experiment
5. Analyse Data
6. Conclusion
Define Hypothesis - Correct Answers -An educated guess
What is the name of the variable that is being measured? - Correct Answers -
Dependent Variable
What is the name of the variable that is being manipulated/changed? - Correct Answers
-Independent Variable
Why is it important to document your sources when completing a scientific
investigation? - Correct Answers -In order to one, give credit to the source to avoid
plagiarism as well as making sure that your investigation has gotten information from a
trustworthy place.
What are the manners of death? - Correct Answers -natural, accident, suicide,
homicide, undetermined
What is the difference between cause of death and manner of death? - Correct Answers
-Manner of death: natural, accident, suicide, homicide, undetermined
Cause of death: what actually caused the person to die (blunt force trauma, lung failure,
heart failure, loss of blood, etc.)
What is the purpose of an autopsy? - Correct Answers -To determine the manner and
cause of death. Also to provide an in-depth examination in order to solve a crime.
What medical professional is responsible for performing autopsies? - Correct Answers -
Pathologists
What is DNA? - Correct Answers -Deoxyribonucleic Acid; this molecule is made up of
primarily Oxygen, Nitrogen, Phosphorus, Hydrogen, and Carbon, and has four main
, bases that can pair up with each other. Adenine forms a double Hydrogen bond with
Thymine (or Uracil in RNA), and Guanine forms a triple Hydrogen bond with Cytosine.
This molecule stores genetic information, and genetic information is determined by the
order or sequence of the base pairs.
What is the basic structural unit of DNA? - Correct Answers -a Nucleotide
What are the three components of a nucleotide? - Correct Answers -Deoxyribose (or
Ribose in RNA) Sugar, Phosphate Group, and Base (A, T, G, or C)
What are the four Nitrogenous bases? What are their complementary Base? - Correct
Answers -Adenine = Thymine
Guanine --- (triple bond) Cytosine
What type of bond is found between paired bases of DNA? - Correct Answers -
Hydrogen Bonds; formed when there is a polar covalent bond between molecules that
makes one side positive, and the other side negative. This results in a slight attraction
between the two molecules.
What forms the backbone of DNA? - Correct Answers -Deoxyribose sugar and
Phosphate group.
What is the difference between a purine and a pyrimidine? - Correct Answers -Purines
have two rings; pyrimidines have one.
Phosphate Group - Correct Answers -Made of a Phosphorus and 4 Oxygen, holds a 3-
charge; diatomic molecule in a tetrahedral shape.
What bases are pyrimidines? - Correct Answers -Cytosine and Thymine
What accounts for genetic variation? - Correct Answers -The different sequences of
DNA or order of the base pairs
When completing DNA extraction, why is there an additional step in isolating plant DNA
compared to animal DNA? - Correct Answers -Because plant cells have a cell wall
around them where animal cells do not.
Final Review Exam
List the Steps of the Scientific Method - Correct Answers -1. Observation
2. Hypothesis
3. Prediction
4. Experiment
5. Analyse Data
6. Conclusion
Define Hypothesis - Correct Answers -An educated guess
What is the name of the variable that is being measured? - Correct Answers -
Dependent Variable
What is the name of the variable that is being manipulated/changed? - Correct Answers
-Independent Variable
Why is it important to document your sources when completing a scientific
investigation? - Correct Answers -In order to one, give credit to the source to avoid
plagiarism as well as making sure that your investigation has gotten information from a
trustworthy place.
What are the manners of death? - Correct Answers -natural, accident, suicide,
homicide, undetermined
What is the difference between cause of death and manner of death? - Correct Answers
-Manner of death: natural, accident, suicide, homicide, undetermined
Cause of death: what actually caused the person to die (blunt force trauma, lung failure,
heart failure, loss of blood, etc.)
What is the purpose of an autopsy? - Correct Answers -To determine the manner and
cause of death. Also to provide an in-depth examination in order to solve a crime.
What medical professional is responsible for performing autopsies? - Correct Answers -
Pathologists
What is DNA? - Correct Answers -Deoxyribonucleic Acid; this molecule is made up of
primarily Oxygen, Nitrogen, Phosphorus, Hydrogen, and Carbon, and has four main
, bases that can pair up with each other. Adenine forms a double Hydrogen bond with
Thymine (or Uracil in RNA), and Guanine forms a triple Hydrogen bond with Cytosine.
This molecule stores genetic information, and genetic information is determined by the
order or sequence of the base pairs.
What is the basic structural unit of DNA? - Correct Answers -a Nucleotide
What are the three components of a nucleotide? - Correct Answers -Deoxyribose (or
Ribose in RNA) Sugar, Phosphate Group, and Base (A, T, G, or C)
What are the four Nitrogenous bases? What are their complementary Base? - Correct
Answers -Adenine = Thymine
Guanine --- (triple bond) Cytosine
What type of bond is found between paired bases of DNA? - Correct Answers -
Hydrogen Bonds; formed when there is a polar covalent bond between molecules that
makes one side positive, and the other side negative. This results in a slight attraction
between the two molecules.
What forms the backbone of DNA? - Correct Answers -Deoxyribose sugar and
Phosphate group.
What is the difference between a purine and a pyrimidine? - Correct Answers -Purines
have two rings; pyrimidines have one.
Phosphate Group - Correct Answers -Made of a Phosphorus and 4 Oxygen, holds a 3-
charge; diatomic molecule in a tetrahedral shape.
What bases are pyrimidines? - Correct Answers -Cytosine and Thymine
What accounts for genetic variation? - Correct Answers -The different sequences of
DNA or order of the base pairs
When completing DNA extraction, why is there an additional step in isolating plant DNA
compared to animal DNA? - Correct Answers -Because plant cells have a cell wall
around them where animal cells do not.
