Bio frq 2009 form a

Test Preparation AP Sciences
1

<p>I had to write about the physiological changes in fish due to water temperature for AP Bio FRQ prep.
I was writing about how the fish is an ectotherm whose body temperature is affected and largely manipulated by the temperature of the surrounding environment. I wrote that once the water around the fish reaches the narrow range of temperatures that is the most optimum for the metabolic enzymes of the fish, the enzymes will work vigorously in conjunction with the substrates, since all of them experience an increase in kinetic energy, which further leads to increase in collisions and thus reactions. </p>

<p>But, the problem is that I wrote about how the enzymes denature and slow down in terms of their reaction rate when the water temperature becomes too warm for the fish. Yet, the FRQ guideline provided by the collegeboard tells me that I cannot talk about DENATURATION of metabolic enzymes, only about enzyme activity decrease/increase.</p>

<p>WHY CAN'T I? I'm really lost </p>

<p>Thanx in advance :D</p>

2

<p>The temperature isn’t high enough to denature the enzymes (you don’t cook fish at 27°C, do you?).</p>

3

<p>Well I wrote about denaturation too. But because the collegeboard says so, it makes sense. I think you need a higher temperature for the denaturation to happen. IT basically depends on the enzymes( bond strength- ionic, hydrophobic, covalent etc.) So explaining that activity increases or decreases is more safe.</p>

4

<p>thanx, both aldfig0 and ubermevin !</p>

<p>what an insightful comment, aldfig0 :)</p>

<p>and yeah, I will rather mention the activity of the enzyme in this temp. range, ubermevin :smiley: thanx for that substitute answer.</p>