1.3 Blueprint and Reasoning Skills
Key Takeaways
CLEP Biology weights Molecular and Cellular Biology at 33 percent, Organismal Biology at 34 percent, and Population Biology at 33 percent.
Molecular and cellular headings are chemical composition of organisms, cells, enzymes, energy transformations, cell division, and the chemical nature of the gene.
Organismal headings are plant structure and transport, plant reproduction and development, vertebrate systems, animal reproduction and development, and heredity.
Population headings are ecology, evolution, behavior, and social biology, and the live College Board outline matches the December 2020 at-a-glance topic list.
On a data table, name the control and compare rates measured under the same conditions, and do not treat an unmeasured mechanism as a result the table showed.
1.3 Blueprint and Reasoning Skills
CLEP Biology publishes three areas, a weight for each, and the major headings inside them. Three abilities cross that map, so a stem can ask for a process, a small table, or a social consequence. The weights tell you where the hours should go.
The three areas and the weights to use
The areas are Molecular and Cellular Biology (33 percent), Organismal Biology (34 percent), and Population Biology (33 percent). A plan that stays almost entirely in cells, or almost entirely in ecology, misses about a third of the questions.
Note
The live College Board Biology outline matches the December 2020 at-a-glance topic list: the same three areas, the same 33, 34, and 33 percent weights, and the same major headings. Those are the headings to study.
Headings inside molecular and cellular biology
Molecular and Cellular Biology is about 33 percent of the exam. Its major headings are the chemical composition of organisms, cells, enzymes, energy transformations, cell division, and the chemical nature of the gene.
Chemical composition covers bonds, water, carbohydrates, lipids, proteins, nucleic acids, and the origin of life. Cells covers organelles, membranes, and prokaryotic versus eukaryotic cells. Enzymes covers the enzyme-substrate complex, coenzymes, inorganic cofactors, inhibition, and regulation. Energy transformations covers glycolysis, cellular respiration, aerobic and anaerobic pathways, and photosynthesis. Cell division covers chromosomes, mitosis, meiosis, and cytokinesis. The gene heading covers the Watson-Crick model, replication, mutations, transcription, translation, post-transcriptional processing, structural and regulatory genes, transformation, and viruses.
Headings inside organismal biology
Organismal Biology is about 34 percent. The headings worth quizzing by short name are plant structure and transport, plant reproduction and development, vertebrate systems, animal reproduction and development, and heredity.
Plant structure and transport is structure and function in plants, with emphasis on angiosperms: root, stem, leaf, flower, seed, and fruit; water and mineral transport; and food translocation and storage. Plant reproduction and development includes alternation of generations in ferns, conifers, and flowering plants, gametes, fertilization, hormones, tropisms, and photoperiodicity. Vertebrate systems means animal structure and function with emphasis on vertebrates: digestive, gas exchange, skeletal, nervous, circulatory, excretory, and immune systems, plus homeostasis and hormonal control. Animal reproduction and development runs from gametes through cleavage, gastrulation, and organ formation, including extraembryonic membranes and the mammalian placenta. Heredity covers Mendelian inheritance, chromosomes, linkage including sex linkage, polygenic traits, and multiple alleles.
Headings inside population biology
Population Biology is about 33 percent. Its major headings are ecology, evolution, behavior, and social biology.
Ecology includes energy flow, biogeochemical cycles, population growth and regulation, communities and succession, habitat, niche, island biogeography, and evolutionary ecology. Evolution includes natural selection (differential reproduction, mutation, Hardy-Weinberg equilibrium, speciation, and punctuated equilibrium), adaptive radiation, homology and analogy, convergence, extinction, genetic drift, classification, and human evolutionary history. Behavior focuses on stereotyped and learned social behavior and on societies of insects, birds, and primates. Social biology covers human population growth, resource management and pollution, and biomedical progress such as reproductive control and genetic engineering.
Three abilities that cross every heading
Questions use one or more of three abilities. Facts, principles, and processes means knowing a term or which process produces a result. Collecting and interpreting information and making predictions means seeing how data were collected, what comparison they support, and which further step is only a prediction. Science as a human endeavor with social consequences means recognizing effects on people or environments that the stem actually states, not a consequence you add.
Tip
Name the ability before you choose an answer. Recall of a process, a comparison inside a table, and a social consequence stated in the stem are different jobs.
How to read a small data table
A student records oxygen consumed in 15 minutes.
| Setup | Temperature | Oxygen consumed (mL) |
|---|---|---|
| Yeast plus glucose | 30°C | 4.8 |
| Yeast plus glucose | 10°C | 1.1 |
| Glucose, no yeast | 30°C | 0.2 |
Name the control before you rank the numbers. The two flasks at 30°C test whether yeast accounts for the oxygen use. The glucose flask without yeast used 0.2 mL. It is the control because it omits yeast, not because 0.2 is small. The largest value is not the control by default.
Compare rates on a shared clock. Both yeast rows ran 15 minutes. The 30°C yeast used 4.8 mL and the 10°C yeast used 1.1 mL, so the warmer suspension consumed oxygen faster in this trial. The no-yeast flask supports only this limited claim: under these conditions, oxygen use is associated with yeast.
Stop before a mechanism the table never measured. No enzyme test appears, so a claim that a respiratory enzyme failed at 10°C is not a result. A middle temperature was not run, so a volume between 1.1 mL and 4.8 mL would be a prediction.
A second pass for traps
Glucose is in every flask, and there is no water-only row, so the table cannot show that glucose raised the rate. A substrate conclusion would invent that comparison.
Caution
A larger number is not the control, and a difference in rate is not a named mechanism. Report the comparison the columns support, and label any further cause as untested.
Weight table for the study plan
| Area | Approximate weight | Major headings to be able to name |
|---|---|---|
| Molecular and Cellular Biology | 33% | Chemical composition, cells, enzymes, energy transformations, cell division, chemical nature of the gene |
| Organismal Biology | 34% | Plant structure and transport, plant reproduction and development, vertebrate systems, animal reproduction and development, heredity |
| Population Biology | 33% | Ecology, evolution, behavior, social biology |
The live College Board page uses the same topic list as the December 2020 at-a-glance. Keep this weight map, and refresh fee and retake rules when those policies change.
How does College Board weight the three official areas of CLEP Biology?
Molecular and Cellular Biology is about half the exam, and the other two areas split the remainder evenly.
Population Biology is 34 percent because it contains evolution, and the molecular area is about 20 percent.
Each of the three areas is exactly one third of the exam, so organismal biology has no additional weight.
Molecular and Cellular Biology is 33 percent, Organismal Biology is 34 percent, and Population Biology is 33 percent.
Where do vertebrate body systems and social biology belong on the CLEP Biology outline?
Both social biology and vertebrate systems are subheadings of principles of heredity.
Vertebrate systems belong to organismal biology, while social biology belongs with ecology, evolution, and behavior under population biology.
Social biology is part of plant reproduction, and vertebrate systems are part of chemical composition.
Social biology sits with enzymes in molecular and cellular biology, and vertebrate systems sit under population biology.
A table reports oxygen consumed in 15 minutes: yeast plus glucose at 30°C used 4.8 mL, yeast plus glucose at 10°C used 1.1 mL, and glucose with no yeast at 30°C used 0.2 mL. Which reading stays inside the table?
The 0.2 mL result should be discarded as an error, and the table shows that glucose alone produced the oxygen.
The yeast rows prove that the colder temperature increased oxygen use through faster diffusion at 10°C.
The 4.8 mL flask is the control because it has the largest value, and the drop at 10°C proves that a named respiratory enzyme was denatured.
The no-yeast flask is the control for whether yeast accounts for the oxygen use, the 30°C yeast suspension had the higher rate, and the table does not identify an enzyme mechanism.
Sections you finish are checked off in the contents.