PLTW PBS 2026 MEDICAL INVESTIGATION
AND CASE STUDY MODULE QUESTIONS
SOLUTIONS STRUCTURED SCRIPT
◉ plasma
Answer: liquid portion of the blood
◉ keratin
Answer: what hair is composed of
◉ minutiae
Answer: tiny fingerprint ridge detail
◉ rigor mortis
Answer: stiffening of the muscles that occurs shortly after death
◉ lividity
Answer: pooling of blood
◉ algor mortis
,Answer: cooling of the body
◉ (98.4-measure rectal temperature)/1.5
Answer: glaister equation: gives the approximate hours since death
◉ oblong blood spatters
Answer: person was falling when blood was spilled
◉ circular blood spatters
Answer: person was standing straight up when blood was spilled
◉ DNA
Answer: the hereditary material in humans and all living organisms
◉ nucleotide
Answer: basic structural unit of DNA; made of a sugar molecule, a
phosphate group, and a nitrogenous base
◉ adenine, thymine, cytosine, guanine
Answer: four nitrogenous bases
◉ James Watson and Francis Crick
, Answer: scientists who described the 3-D structure of DNA
◉ thymine
Answer: base with one ring and two bonds
◉ adenine
Answer: base with two rings and two bonds
◉ guanine
Answer: base with two rings and three bonds
◉ cytosine
Answer: base with one ring and three bonds
◉ purines
Answer: have two rings
◉ pyrimidines
Answer: have one ring
◉ genes
AND CASE STUDY MODULE QUESTIONS
SOLUTIONS STRUCTURED SCRIPT
◉ plasma
Answer: liquid portion of the blood
◉ keratin
Answer: what hair is composed of
◉ minutiae
Answer: tiny fingerprint ridge detail
◉ rigor mortis
Answer: stiffening of the muscles that occurs shortly after death
◉ lividity
Answer: pooling of blood
◉ algor mortis
,Answer: cooling of the body
◉ (98.4-measure rectal temperature)/1.5
Answer: glaister equation: gives the approximate hours since death
◉ oblong blood spatters
Answer: person was falling when blood was spilled
◉ circular blood spatters
Answer: person was standing straight up when blood was spilled
◉ DNA
Answer: the hereditary material in humans and all living organisms
◉ nucleotide
Answer: basic structural unit of DNA; made of a sugar molecule, a
phosphate group, and a nitrogenous base
◉ adenine, thymine, cytosine, guanine
Answer: four nitrogenous bases
◉ James Watson and Francis Crick
, Answer: scientists who described the 3-D structure of DNA
◉ thymine
Answer: base with one ring and two bonds
◉ adenine
Answer: base with two rings and two bonds
◉ guanine
Answer: base with two rings and three bonds
◉ cytosine
Answer: base with one ring and three bonds
◉ purines
Answer: have two rings
◉ pyrimidines
Answer: have one ring
◉ genes