PLTW Biomedical Science Final Exam
review Questions and Answers
PPE (personal protective equipment) - Correct Answers -gloves, lab coats, safety
glasses
Types of evidence - Correct Answers -fingerprints, footprints, hair, identification, bodily
fluids/DNA
Determining time of death - Correct Answers -Rigor mortis, algor mortis, lividity
rigor mortis - Correct Answers -the stiffening of the body after death
Algor Mortis - Correct Answers -The cooling of the body after death
aseptic technique - Correct Answers -A procedure performed under sterile conditions.
Plate streaking - Correct Answers -a lab technique used to obtain individual colonies of
bacterial clones
Gram staining - Correct Answers -A process by which components of bacterial cell walls
are bound to Gram's stain. Depending on the amount of peptidoglycan in their cell walls,
bacteria stain differently and are classified as Gram-negative or Gram-positive.
Bacterial Identification - Correct Answers -involves a limited set of techniques that can
determine the species
lactose fermentation test - Correct Answers -Test to determine if the microbe can
ferment the sugar lactose as a food source. The microbe is incubated in phenol red
lactose broth for 24 hours. If the microbe ferments lactose, the media become acidic,
causing a color change from red to yellow.
Motility Test - Correct Answers -determine motility based on pattern of growth
Phagocytes - Correct Answers -A type of white blood cell that ingests invading microbes
B cells - Correct Answers -produce antibodies
, Lividity (Livor mortis) - Correct Answers -Blood pooling in tissues and discoloration in
skin
Glaister Equation - Correct Answers -98.4 - rectal temp. / 1.5
Blood Spatter - Correct Answers -Can be analyzed to determine patterns that help
determine how crime might have happened
What is DNA? - Correct Answers -deoxyribonucleic acid
Chromosomes - Correct Answers -threadlike structures made of DNA molecules that
contain the genes
Gene - Correct Answers -sequence of DNA that codes for a protein and thus
determines a trait
Nucleotide - Correct Answers -A building block of DNA, consisting of a five-carbon
sugar covalently bonded to a nitrogenous base and a phosphate group.
restriction enzymes - Correct Answers -Enzyme that cuts DNA at a specific sequence of
nucleotides
gel electrophoresis - Correct Answers -Procedure used to separate and analyze DNA
fragments by placing a mixture of DNA fragments at one end of a porous gel and
applying an electrical voltage to the gel
Muscular System - Correct Answers -Consists of skeletal muscles, tendons that connect
muscles to bones, and ligaments that attach bones together to form joint
nervous system - Correct Answers -the network of nerve cells and fibers that transmits
nerve impulses between parts of the body.
urinary system - Correct Answers -Eliminates nitrogenous wastes from the body.
Regulates water, electrolyte and acid-base balance of the blood.
cardiovascular system - Correct Answers -The transport system of the body responsible
for carrying oxygen and nutrients to the body and carrying away carbon dioxide and
other wastes; composed of the heart, blood vessels, and blood.
skeletal system - Correct Answers -bones
digestive system - Correct Answers -Breaks down food into absorbable units that enter
the blood for distribution to body cells.
review Questions and Answers
PPE (personal protective equipment) - Correct Answers -gloves, lab coats, safety
glasses
Types of evidence - Correct Answers -fingerprints, footprints, hair, identification, bodily
fluids/DNA
Determining time of death - Correct Answers -Rigor mortis, algor mortis, lividity
rigor mortis - Correct Answers -the stiffening of the body after death
Algor Mortis - Correct Answers -The cooling of the body after death
aseptic technique - Correct Answers -A procedure performed under sterile conditions.
Plate streaking - Correct Answers -a lab technique used to obtain individual colonies of
bacterial clones
Gram staining - Correct Answers -A process by which components of bacterial cell walls
are bound to Gram's stain. Depending on the amount of peptidoglycan in their cell walls,
bacteria stain differently and are classified as Gram-negative or Gram-positive.
Bacterial Identification - Correct Answers -involves a limited set of techniques that can
determine the species
lactose fermentation test - Correct Answers -Test to determine if the microbe can
ferment the sugar lactose as a food source. The microbe is incubated in phenol red
lactose broth for 24 hours. If the microbe ferments lactose, the media become acidic,
causing a color change from red to yellow.
Motility Test - Correct Answers -determine motility based on pattern of growth
Phagocytes - Correct Answers -A type of white blood cell that ingests invading microbes
B cells - Correct Answers -produce antibodies
, Lividity (Livor mortis) - Correct Answers -Blood pooling in tissues and discoloration in
skin
Glaister Equation - Correct Answers -98.4 - rectal temp. / 1.5
Blood Spatter - Correct Answers -Can be analyzed to determine patterns that help
determine how crime might have happened
What is DNA? - Correct Answers -deoxyribonucleic acid
Chromosomes - Correct Answers -threadlike structures made of DNA molecules that
contain the genes
Gene - Correct Answers -sequence of DNA that codes for a protein and thus
determines a trait
Nucleotide - Correct Answers -A building block of DNA, consisting of a five-carbon
sugar covalently bonded to a nitrogenous base and a phosphate group.
restriction enzymes - Correct Answers -Enzyme that cuts DNA at a specific sequence of
nucleotides
gel electrophoresis - Correct Answers -Procedure used to separate and analyze DNA
fragments by placing a mixture of DNA fragments at one end of a porous gel and
applying an electrical voltage to the gel
Muscular System - Correct Answers -Consists of skeletal muscles, tendons that connect
muscles to bones, and ligaments that attach bones together to form joint
nervous system - Correct Answers -the network of nerve cells and fibers that transmits
nerve impulses between parts of the body.
urinary system - Correct Answers -Eliminates nitrogenous wastes from the body.
Regulates water, electrolyte and acid-base balance of the blood.
cardiovascular system - Correct Answers -The transport system of the body responsible
for carrying oxygen and nutrients to the body and carrying away carbon dioxide and
other wastes; composed of the heart, blood vessels, and blood.
skeletal system - Correct Answers -bones
digestive system - Correct Answers -Breaks down food into absorbable units that enter
the blood for distribution to body cells.
