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PLTW- Biomed End of Course Final Review (1)
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PLTW- Biomed End of Course Final Review (1)
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PLTW- Biomed End of Course Final ReviewHow quickly does the body lose heat after death? - ANS-Approximately 1.5 degrees Fahrenheit
per hour until it reaches surrounding environment temp
Who did the fingerprint at the crime scene belong to? - ANS-Alex Garcia
What blood type was at the crime scene and whos could it have been? - ANS-B+, Anna or Erica
Who did the hair, shoe, and DNA at the crime scene belong to? - ANS-Anna
How can body temp be measured? - ANS-Rectally or with a hypodermic probe of the liver or
brain
What was Anna's approximate time of death? - ANS-7:00 am
What is rigor mortis? - ANS-stiffening of the muscles after death
What is liver mortis (lividity)? - ANS-Pooling of the blood after death
What is algor mortis? - ANS-Cooling of the body after death
What causes your muscles to become stiff after death, or rigor mortis? - ANS-The loss of ATP
which lasts for about 3 hours after death
What are the 4 manner of death possibilities? - ANS-Homocide, suicide, natural, or accident
What does a crime scene sketch include? - ANS-Sketch, key, victim stats, scale
What is a presumptive test? - ANS-The sample is definitely not a substance/it is probably a
certain substance
What is a confirmatory test? - ANS-exact substance is identified; expensive test
What are antigens? - ANS-proteins found on the surface of red blood cells
What are the 8 different blood types? - ANS-A+, A-, B+, B-, AB+, AB-, O+, O-
What is blood composed of? - ANS-liquid plasma, red blood cells, white blood cells, platelets,
antigens and antibodies
What protein is hair composed of? - ANS-Keratin
, What is the cortex responsible for? - ANS-hair color
What are the 4 main fingerprints? - ANS-arch, loop, whorl, tented arch
What are minutiae? - ANS-Specific ridge marks in the fingertips
What is an arch fingerprint? - ANS-
What is a loop fingerprint? - ANS-
What is a whorl fingerprint? - ANS-
What is a tented arch fingerprint? - ANS-
Do red blood cells have DNA? - ANS-NO
What shape is DNA in? - ANS-a double helix
How many bonds do adenine and thymine need? - ANS-2 hydrogen bonds
How many bonds do Guanine and cytosine need? - ANS-3 hydrogen bonds
Why is DNA considered anti-parallel? - ANS-they run in opposite directions
Which two nitrogen bases are purines, and what does it mean? - ANS-Adenine and Guanine
and they have 1 ring of nitrogen atoms
Which two nitrogen bases are pyrimidines and what does it mean? - ANS-Thymine and
Cytosine and they have 2 rings of nitrogen atoms
Who was the first person to isolate human DNA? - ANS-Friedrich Meischer
Approximately how many nucleotides are in a strand of DNA? - ANS-over 3 billion
How is DNA packaged? - ANS-DNA is packaged as chromosomes, that contain numerous
segments of DNA called genes
What is DNA wrapped around? - ANS-DNA is tightly wound around histone proteins, forming a
unit called a nucleosome
Does DNA from all living things have the same basic structure? - ANS-Yes, the only difference is
the order of the nucleotides
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