You are a student researcher in a comparative physiology lab for the summer. You
ID: 211976 • Letter: Y
Question
You are a student researcher in a comparative physiology lab for the summer. You are interested in temperature effects on lactate dehydrogenase (LDH) in fish. Your supervisor has asked you to write a hypothesis and prediction before you start your experiments. Choose the answer below that is most likely, based on the scientific literature (and what you have learned in BIOL 1070) Hypothesis: Warm temperatures accelerate enzyme rates. Prediction: If so, then LDH activity in fish acclimatized to warmer temperatures will always be higher relative to fish acclimatized to cooler temperatures. Hypothesis: Ectotherms adjust enzyme expression during chronic temperature change to maintain enzyme function. Prediction: If so, then LDH activity in fish acclimatized to warmer temperatures will be approximately the same as fish acclimatized to cooler temperatures. Hypothesis: Ectotherms conform to their environment. Prediction: If so, then LDH activity in fish will increase in warm waters and decrease in cool waters at all time points. Hypothesis: Temperature changes impact enzyme function through homeoviscous adaptation Prediction: If so, then LDH activity will be maintained at all temperaturesExplanation / Answer
Temperature changes impact enzyme function through homeoviscus adaptation.
fish are ectotherm. Hence it can not produce heat to maintain constant temperature in accordance with outer environment. Additionally these ectotherm are poikilothermic. Its internal temperature varies dependent on outer environmental temperature. It maintain their body temperature though membrane lipid composition. In homeoviscus adaptation, membrane lipid composition maintain membrane fluidity with respect to change in temperature.
hence LDH and other enzyme activity will be maintained at all temperature
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