Bonus

At the molecular level, this process occurs due to telomeres shortening until a cell surpasses the Hayflick limit. For 10 points each:
[10e] Name this process that is greatly accelerated in progeria (“pro-JEER-ee-uh”) patients.
ANSWER: aging [or senescence; accept getting older]
[10h] A form of progeria called Cockayne syndrome arises from mutations in ERCC8 or ERCC6, both of which are involved in this process. Uvr proteins and spore photoproduct lyase can mediate this process in bacteria.
ANSWER: nucleotide excision repair [or NER; prompt on DNA repair; reject other DNA repair mechanisms, such as “base excision repair” or “mismatch repair”]
[10m] Nucleotide excision repair is the primary mechanism for fixing these defects. These defects arise from a [2+2] cycloaddition that occurs when DNA is exposed to UV radiation.
ANSWER: thymine dimers [or thymidine dimers or T dimers or TT photodimers; accept pyrimidine dimers or cyclobutane pyrimidine dimers or CPDs; accept 6–4 photoproducts; prompt on dimers; prompt on DNA damage or mutations]
<Biology>
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Conversion

TeamOpponentPart 1Part 2Part 3TotalParts
British ColumbiaOttawa100010E
Chicago BGeorgia Tech100010E
Columbia AWaterloo A10101030EHM
Columbia BCornell B100010E
Cornell AToronto B1001020EM
Georgia StateWUSTL B1001020EM
HarvardMIT100010E
Illinois AStanford10101030EHM
Iowa StateTexas100010E
Johns HopkinsToronto C1001020EM
LSEFlorida100010E
MinnesotaVirginia Tech100010E
NYUUC Berkeley B1001020EM
North Carolina AIndiana1001020EM
NorthwesternChicago A10101030EHM
Penn StateArizona State1001020EM
RITOhio State100010E
Toronto ARutgers10101030EHM
UC Berkeley AWUSTL A1001020EM
UCFMichigan1001020EM
VanderbiltIllinois B100010E
VirginiaNorth Carolina B100010E
Winona StateMaryland100010E
YaleWaterloo B100010E

Summary

TournamentExact Match?HeardPPBEasy %Medium %Hard %
2025 ACF NationalsYes2416.67100%50%17%