mutualism - 2024 ACF Regionals

Question

Answer the following about Aliivibrio fischeri activity within the Hawaiian bobtail squid, for 10 points each.

[10e] In exchange for being allowed to grow, A. fischeri enables the squid to hide its shadow via bioluminescence, exemplifying this form of symbiosis. Both organisms benefit in this symbiotic relationship.

ANSWER: mutualism [or word forms like mutualistic]

[10m] A. fischeri activates bioluminescence by regulating the lux operon via this process. More generally, this process involves bacteria changing their protein expression based on the cell density of their environment.

ANSWER: quorum sensing [accept QS]

[10h] Bacteria release and then track the concentration of these chemicals to determine whether cell density is high enough for quorum sensing. Acyl homoserine-lactones are the version of these chemicals used by A. fischeri.

ANSWER: autoinducers [accept quorum factors]

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Summary


2024 ACF Regionals @ Berkeley	01/27/2024	Y	3	20.00	100%	100%	0%
2024 ACF Regionals @ Cornell	01/27/2024	Y	3	13.33	100%	33%	0%
2024 ACF Regionals @ JMU	01/27/2024	Y	11	14.55	100%	46%	0%
2024 ACF Regionals @ Minnesota	01/27/2024	Y	2	15.00	100%	50%	0%
2024 ACF Regionals @ Nebraska	01/27/2024	Y	6	15.00	100%	50%	0%
2024 ACF Regionals @ Ohio State	01/27/2024	Y	3	13.33	100%	33%	0%
2024 ACF Regionals @ Rutgers	01/27/2024	Y	5	12.00	100%	20%	0%
2024 ACF Regionals @ Imperial	01/27/2024	Y	4	17.50	100%	75%	0%
2024 ACF Regionals @ Vanderbilt	01/27/2024	Y	5	12.00	100%	20%	0%

Data


Berkeley B	Berkeley A	10	10	20
Iowa State	Minnesota C	10	10	20
Claremont A	Iowa A	10	10	20
John Jay	Johns Hopkins	10	0	10
NYU A	NYU B	10	0	10
MTSU	Harding	10	0	10
Kentucky	Georgia Tech B	10	0	10
Stanford A	Berkeley C	10	10	20
Stanford B	Stanford C	10	10	20
Cornell B	Binghamton	10	0	10
Cornell A	RIT A	10	10	20
Maryland B (UG)	GWU B (Grad)	10	0	10
Liberty B (DII)	JMU A (UG)	10	0	10
Virginia A (UG)	UNC C (UG)	10	10	20
Virginia B (UG)	Maryland C (DII)	10	0	10
Minnesota B	Arizona State	10	0	10
UBC A	Michigan State A	10	10	20
UW A	Texas A&M A	10	0	10
Texas A&M B	Appalachian State	10	0	10
Ohio State A	Michigan C	10	0	10
Ohio State B	Kenyon	10	0	10
Columbia A	Penn	10	10	20
Columbia C	Rowan	10	0	10
Imperial A	Durham A	10	10	20
Durham B	Oxford C	10	10	20
Vanderbilt A	Tennessee	10	0	10
Cornell C	RIT B	10	0	10
Liberty A (Grad)	Duke A (UG)	10	0	10
GWU A (UG)	JMU B (UG)	10	0	10
UNC D (DII)	Liberty C (DII)	10	0	10
William & Mary A (UG)	Roanoke College A (DII)	10	10	20
Maryland A (Grad)	UNC B (UG)	10	10	20
UNC A (Grad)	Virginia C (UG)	10	10	20
UNC A (Grad)	Virginia C (UG)	10	10	20
UNC A (Grad)	Virginia C (UG)	10	10	20
UNC A (Grad)	Virginia C (UG)	10	10	20
UNC A (Grad)	Virginia C (UG)	10	10	20
UNC A (Grad)	Virginia C (UG)	10	10	20
UNC A (Grad)	Virginia C (UG)	10	10	20
UNC A (Grad)	Virginia C (UG)	10	10	20
Texas A	Rice A	10	10	20
Sorbonne	Iowa B	10	0	10
Michigan B	Michigan A	10	10	20
Haverford	Columbia B	10	0	10
Sheffield	Bristol	10	0	10
Cambridge A	Warwick	10	10	20
Geodesic	Vanderbilt B	10	10	20
Georgia Tech A	Alabama	10	0	10