Take a Diagnostic Exam ❮ 29
Questions from Chapter 18
- C—Learn the defense mechanisms well from
predator–prey relationships in Chapter 18. They
will be represented on the exam.
- C—Mutualism is the interaction in which both
parties involved benefit.
- C—Biomes are annoying and tough to memo-
rize. Learn as much as you can about them
without taking up too much time.... More
often than not there will be two to three
multiple-choice questions about them. But you
want to make sure you learn enough to work
your way through a free-response question if you
were to be so unfortunate as to have one on
your test.
- D—A J-shaped growth curve is characteristic of
exponentially growing populations. That is a
characteristic of R-selected strategists.
Questions from Chapter 19
- B—The rate of reaction for an enzyme-aided
reaction is best estimated by taking the slope of
the constant portion of the moles–time plot.
- C—They will test your ability to interpret data
on this exam. You should make sure that you are
able to look at a chart and interpret information
given to you. This enzyme does indeed function
most efficiently at 20°C. Above and below that
temperature, the reaction rate is lower.
- A—At a pH of 6 and a temperature of 25°C,
enzyme 3 is actually more efficient than enzyme 2
and less efficient than enzyme 1.
- E—This question requires you to know that a
pH below 7 (pH <7) is acidic and a pH above 7
(pH>7) is basic. It is true that all three enzymes
increase the rate of reaction more when in acidic
environments than basic environments.
Scoring and Interpretation
Now that you have finished the diagnostic exam and scored yourself, it is time to try to
figure out what it all means. First, see if there are any particular areas with which you per-
sonally struggled. By this we mean, were there any questions during which you were think-
ing to yourself something like, “I learned this... when?!?!” or “What the heck is this?!?!” If
so, put a little star next to the chapter that contains the material for which this occurred.
You may want to spend a bit more time on that chapter during your review for this exam.
It is quite possible that you neverlearned some of the material in this book. Not every class
is able to cover all the same information.
To get your baseline score for this practice exam, use the following formula (where
Nrepresents the number of answers):
Ncorrect=raw score for the multiple-choice section
There are no free-response questions in the diagnostic because we did not want to put
you through the torture of that procedure yet, as you are just beginning your journey. As a
result, we will guesstimate your score on the basis of multiple-choice questions alone. We
will spare you our convoluted calculations and just show you what range we came up with
in our analysis. Remember, these are just rough estimates on questions that are not actual
AP exam questions... do not read too much into them.
Raw Score Approximate AP Score
35–60 5
26–34 4
19–25 3
11–18 2
0–10 1
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