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Biomedical PLTW EOC Review (1).
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Biomedical PLTW EOC Review (1).
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Biomedical PLTW EOC ReviewWhat are 5 pieces of evidence that can be found at a crime scene to solve a crime? -
ANS--fingerprints
-blood sample
-strand of hair
-shoeprints
-vomit
What are the four bases of DNA? Which are purines and which are pyrimidines? - ANS-Adenine
Guanine
Cytosine
Thymine
(C & T are purines)
(A & G are pyrimidines)
What do restriction enzymes? - ANS-cut DNA
What does gel electrophoresis do? - ANS-it is used to separate DNA fragments according to
size and charge
Explain the difference between negative and positive feedback with examples - ANS-Positive-
causes reinforcement of original action, input causes action to increase (ex: fever, blood clot
formation)
Negative- causes system to stop doing original action and either take no action or perform
opposite action (ex: body temperature, blood pressure)
What is the difference between dehydration synthesis and hydrolysis? - ANS-Dehydration
synthesis- process of joining two molecules together after the removal of water
Hydrolysis- chemical breakdown due to the reaction of water
What is osmosis? - ANS-movement of water across a semipermeable membrane from higher
water potential to lower water potential
How is anemia diagnosed? - ANS-Hematocrit- measures percentage of volume of whole blood
that is made up of RBCs. It depends on the number and size of RBCs
Name and describe the four components of blood - ANS-Plasma- transports blood cells
throughout body
Red Blood Cells- carry oxygen and nutrients from lungs to rest of the body
White Blood Cells- protect body from infection
Platelets- help blood clotting
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