E. coli - 2024 PLAYTIME - Buzzpoints App

Question

Richard Lenski’s ongoing long-term evolution experiment on this organism reached its 73,000th generation in 2020. For 10 points each:

[10e] Name this rod-shaped model organism, a bacteria that thrives in the human gut.

ANSWER: E. coli [or Escherichia coli]

[10h] The original strains in Lenski’s experiment were named based on having one of these structures associated with L-arabinose. A negative feedback loop of attenuation in hairpin loops can repress one of these structures.

ANSWER: operons [accept trp operon; L-arabinose operon or ara operon or araBAD operon]

[10m] One breakthrough in Lenski’s experiment was the ability of E. coli in it to grow in this condition on citric acid. Fermentation can [emphasize] not be conducted under this condition.

ANSWER: aerobic conditions [accept descriptions of oxygen being present; reject “anaerobic”]

<SM, Biology>

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Summary


2025 PLAYTIME @ CWRU	12/10/2024	Y	4	17.50	75%	100%	0%
2025 PLAYTIME @ Claremont	12/10/2024	Y	5	12.00	80%	40%	0%
2025 PLAYTIME @ Florida	12/10/2024	Y	2	10.00	100%	0%	0%
2025 PLAYTIME @ Florida	12/10/2024	Y	1	20.00	100%	100%	0%
2024 PLAYTIME @ Harvard	04/26/2025	Y	4	7.50	75%	0%	0%
2024 PLAYTIME @ JHU	10/26/2024	Y	6	20.00	100%	67%	33%
2025 PLAYTIME @ Northwest	12/10/2024	Y	3	16.67	100%	33%	33%
2025 PLAYTIME Online	04/26/2025	Y	9	21.11	89%	78%	44%
2025 PLAYTIME @ Sheffield	12/10/2024	Y	3	20.00	100%	100%	0%
2024 PLAYTIME @ UBC	10/05/2024	Y	8	20.00	100%	75%	25%
2024 PLAYTIME @ Virginia Tech	07/11/2025	Y	3	16.67	100%	33%	33%
2024 PLAYTIME @ WashU	10/12/2024	Y	6	20.00	100%	83%	17%

Data


Michigan A	Ohio State D	10	0	10	20
Pittsburgh	Michigan D	10	0	10	20
Ohio State A	Michigan B	10	0	10	20
Michigan C	Ohio State B	0	0	10	10
Art of Premature Signaling	UCLA B	10	0	10	20
P.C.‚ Daniel‚ Michel‚ and Jason B	Caltech	10	0	0	10
girl 15 whale i mean they	Claremont A	10	0	10	20
Billy's Bastion	Keeping Up With the Cardassians	10	0	0	10
Edwin Laundrorat's Long-Lost Man Unclothès Rat Degrosses	Qin Shi Huang's Immortality Poison	10	0	0	10
Too much from you lately	Project2025BC: Make Assyria Great Again	10	0	10	20
Maryland B	CWRU	10	0	0	10
Georgetown	Catholic University of America	10	0	0	10
NYU A	Haverford A	10	10	10	30
George Mason A	Johns Hopkins A	10	0	10	20
Maryland A	Haverford B	10	0	10	20
Rutgers	NYU C	10	10	10	30
Carleton	Washington Connections	10	0	10	20
UW A	Arizona State University B	10	0	0	10
Alberta	UW B	10	10	0	20
Egypt Airlines Haters	2 Italians, 2 Poles, All Noles	10	10	10	30
mongeese	Auburn 2026	10	0	0	10
Free Agents 1	Gruh	10	0	10	20
Mike Dukakis Tank Battalion	Goober Gang	10	10	10	30
Notre Dame + Epic Games	Illinois Orange	0	0	10	10
evil women enjoyers	Mahjonng Masters	10	10	10	30
MSJ	Monsieur Hulot's Academic Team	10	0	0	10
we need new names	Quatumvirate	10	10	10	30
Four Generalists in Search of a Power	Trip-Hop Quizzer Tricky	10	0	10	20
Claremont B	UCSB	10	0	0	10
UCLA A	UCSD	0	0	0	0
BU	Brandeis	10	0	0	10
Belmont	Brown	0	0	0	0
Harvard	MIT	10	0	0	10
Lexington	RIT	10	0	0	10
LSE	Cambridge	10	0	10	20
Sheffield C	Lancaster + Sheffield C	10	0	10	20
Warwick A	Warwick B	10	0	10	20
McGill A	UBC	10	0	10	20
Simon Fraser	McGill B	10	0	10	20
Toronto A	Toronto E	10	0	10	20
Adrianne Lenker 4 Nobel Lit Prize 2K65	4 quizbowl pros go Virginia on North Carolina	10	0	0	10
Master and Margaritaville	Ashurbanipal’s Drag Race	10	10	10	30
Even in Blacksburg There I Am	Somehow Paula Deen Returned	10	0	0	10
Chicago A	Truman State	10	0	10	20
Illinois A	Illinois C	10	0	10	20
Iowa State	SIUE	10	0	10	20
Illinois B	Missouri	10	0	0	10
WashU Bulbasaur	Chicago B	10	10	10	30
WashU Charmander	WashU Squirtle	10	0	10	20
Toronto B	Waterloo C	10	0	10	20
Toronto C	Mac A	10	10	10	30
Toronto Metropolitan	Guelph	10	0	0	10
Waterloo A	Ottawa A	10	0	10	20
Waterloo B	Toronto D	10	10	0	20