Test
CHAPTER 2 Review 45
TAKS Test PrepTAKS Test Prep
For a group of questions that refer to a diagram,
graph, or table, read all of the questions quickly to
determine what information you will need to glean
from the graphic.Use the information below and your knowledge
of science to answer questions 1–3.
1.The molecule shown in the
diagram is
A cellulose C RNA
B DNA D ATP2.What is the main function of this
molecule?
F promoting chemical reactions
Gmaking up cell membranes
Hstoring energy
J storing hereditary information
3.What do the dashed lines in the drawing
represent?
A nuclear bonds C hydrogen bonds
B covalent bonds D ionic bondsCritical Thinking
- Evaluating ResultsIn an experiment you
conducted, the rate of an enzyme-catalyzed
reaction increased as you increased the
substrate concentration. But the reaction
rate increased by only a small amount.
Explain why. - Making Inferences from DataAnalysis
of an unknown substance showed that
it has the following characteristics: it
contains carbon, hydrogen, and oxygen
and is soluble in oil but not in water.
What kind of substance is this? Explain
your answer. - Justifying ConclusionsAnimal fats are
usually solid, and plant fats are usually
(liquid) oils. However, in many animals of
the Arctic and Antarctic, animal fats are
mostly oils. What adaptive advantage
would the storage of body fat as oil instead
of as a solid be to animals that live in
freezing climates? - Recognizing DifferencesWhat are two dif-
ferences between ionic bonds and covalent
bonds?
Alternative Assessment
- Finding InformationInvestigate the
laboratory techniques of cell fractionation,
centrifugation, and electrophoresis. Find
out how each technique enables biologists
to experiment with cells and to analyze the
substances that cells produce. Prepare an
oral report and use graphics to interpret
and summarize your findings. - Evaluating Promotional ClaimsAnalyze
the ingredients of various packaged foods.
Record the percentage of carbohydrates,
fats, and proteins in each food. List any
additives that the products contain.
Research whether the additives are natural
or artificial, and find out why they are
added to particular foods. Compare these
data gleaned from your research to
advertising claims about the products
you analyzed. Are the claims valid? - Career ConnectionBiochemistResearch
the field of biochemistry, and write a report
on your findings. Your report should
include a job description, the training
required, names of employers, growth
prospects, and an average starting salary.
If possible, interview a person who works
in this field.
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