USABO EXAM NEWEST 2003/2026 ACTUAL
EXAM QUESTIONS AND CORRECT DETAILED
ANSWERS (VERIFIED ANSWERS) ALL
ANSWERED {7 Q & A} ALREADY GRADED A+ |
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Which of the following oligonucleotides would have the highest
melting point when paired with the proper complementary
strand?
A. 5'-AAAAAAAA-3'
B. 5'-ATGCATGC-3'
C. 5'-CGCGCGCG-3'
D. 5'-TTTTGGGG-3'
E. 5'-TATATATA-3' - ✔✔✔ Correct Answer > C. 5'-CGCGCGCG-3'
Which of the following correctly describes how the lifespan of a
protein is regulated?
A. The part of the sequence coded for by the UTR tags it for
destruction.
B. Giant protein complexes called ubiquitins destroy proteins
after they have remained in the cell for a certain time.