PLTW MEDICAL INTERVENTIONS MIDTERM
EXAM NEWEST 2026 ACTUAL EXAM
QUESTIONS AND CORRECT DETAILED
ANSWERS (VERIFIED ANSWERS) ALL
ANSWERED {80 Q & A} ALREADY GRADED A+ |
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What is DNA ligase? - ✔✔✔ Correct Answer > connects the ends of
molecules together
What is PGD? - ✔✔✔ Correct Answer > When a healthy embryo is
selected from a group of embryos, and then implanted into a
uterus.
What are restriction enzymes? - ✔✔✔ Correct Answer > They cut the
DNA into specific parts
What are the duties of genetic counselors - ✔✔✔ Correct Answer >
Analyze patient histories.
Provide genetic testing.
Perform genetic risk calculations.
Educate families about potential health risks.
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Help patients to cope with a diagnosis
How can recombinant DNA be used to produce vaccines? - ✔✔✔
Correct Answer > Bacteria carry DNA in plasmids. Plasmids work as
vectors and have genes inserted into them. Recombinant DNA
uses restriction enzymes to cut the plasmids and leave sticky
ends. These ends can bond with any DNA cut by THE SAME
restriction enzyme. The viral gene is inserted into the plasmid
and glued together by DNA ligase. The new DNA can have
resistance which makes it beneficial to vaccination
Single gene recessive disorders - ✔✔✔ Correct Answer > Must have 2
copies of the gene. (cystic fibrosis, sickle cell anemia)
Single gene - dominant disorder - ✔✔✔ Correct Answer > disorder that
is controlled by the inheritance of a single gene, must have at
least 1 dominant allele
Multifactorial disorders - ✔✔✔ Correct Answer > conditions caused by
interactions among one or more genes and the environment
Chromosomal disorders - ✔✔✔ Correct Answer > disorders caused by
structural changes to a chromosome or deficiencies of entire
genes located on chromosomes