The big ideaThis exam is 100 points covering 01.01 (what counts as science + variables + theory/law), 01.02 (macromolecule shapes and enzymes), and 01.03 (early Earth and which hypothesis claims what). Your 01.04 review interactive already mixed all three. Start there, then hit the mixed drill.
Three lessons, one exam
The exam is not a new topic. It is 01.01 + 01.02 + 01.03 in one sitting. If a question feels “from nowhere,” it is almost always one of those three.
Not sure about the basics underneath this lesson?
Match the stem to a bucket before you look at the choices.
1
Method bucket (01.01)
Words like hypothesis, variable, control, theory, law, reliable, opinion. No molecule pictures.
2
Molecule bucket (01.02)
A picture, a monomer, C H O N P, enzyme, activation energy, denature, photosynthesis sugar.
3
Origin bucket (01.03)
Atmosphere, oxygen, Miller-Urey, meteorites, RNA, prokaryote, organic vs inorganic.
4
Do not mash the buckets
Miller-Urey did not prove RNA is a catalyst. A theory is not a macromolecule. Salt-and-freezing is method, not origin of life.
Got it now? Scroll back up and re-read the section — it should land differently.
Which lesson is this question from?
Read the stem first. Then pick a row. Do not mix the three lessons together in one answer.
If the stem is about…
Go to
The usual trap
The move
Testable question, IV/DV, control, theory vs law
01.01 Exploring Life
Calling a theory a guess, or saying theories become laws.
Opinion → not science. You change it → IV. You measure it → DV. Theory explains; law describes.
Picture of a molecule, monomer, enzyme graph, denature
01.02 Chemistry of Life
Calling lipids polymers. Mixing N (protein) with P (nucleic acid).
Name the building block (hexagon / tails / amino acid / nucleotide), then the macromolecule. Enzymes lower activation energy.
Early atmosphere, Miller-Urey, RNA World, first cells
01.03 Earth's Early Atmosphere
RNA World only as “shared genetic code” — missing RNA as a catalyst.
Little oxygen, inorganics present. Organics from synthesis or meteorites. First cells = prokaryotes. RNA World has two costumes.
Shortcuts that give away the answer
Lookalike choices: oxygen vs carbon dioxide, increase vs decrease — read every word.
Hexagon or C₆H₁₂O₆ → carbohydrate. Tails → lipid. Folded chain / N → protein. Phosphate + base → nucleic acid.
“Only proteins catalyze” is wrong because of RNA World (Cech), not Miller-Urey.
Theory ≠ law. Theories never become laws.
How this exam will feel
01.05 + how quizzes ask
You already sat two quizzes in this module. They did not look the same. 01.02 was seven items with molecule pictures and a written enzyme/fever item (you scored 22/22). 01.03 was five text questions, 4 points each, no pictures (16/20 — the miss was RNA as a catalyst). The module exam is allowed to use both of those styles plus 01.01 method questions. Your instructor’s DBA list is the official topic list — it matches the three lessons, not honors 01.02A (skip carbon-formula honors unless you are in honors).
Full walkthrough: 01.01 Exploring Life. For the exam you need: science vs opinion, peer-reviewed vs a paid commercial, independent / dependent / controlled variables / control group, why changing two things at once is invalid, x-axis = IV, and theory explains / law describes.
Likely on the quiz01.04 review already asked: salt lowers water’s freezing point (from a data table), theory is an explanation, and an experiment with no control is missing the control.
01.02 — shapes and enzymes
01.02
Full walkthrough + shape drill: 01.02 Chemistry of Life. Carbohydrates = hexagons / C,H,O / energy. Lipids = tails / not polymers / store energy. Proteins = amino acids / N / enzymes. Nucleic acids = nucleotides / P / genetic info. Enzymes lower activation energy and speed reactions; heat past about 50 °C denatures them (shape breaks, they stop).
Glucose ring — carbohydrateSugar + base + phosphate — nucleic acidWith enzyme vs without — lower hill = lower activation energy
Likely on the quiz01.04 review: photosynthesis product = carbohydrate; lactase speeds lactose breakdown; sugar + nitrogen base + phosphate = nucleic acid.
01.03 — origin of life, two RNA costumes
01.03
Full walkthrough: 01.03 Earth's Early Atmosphere. Early air: little/no oxygen, mostly CO₂, water vapor, nitrogen, lots of UV. First organics: made here from inorganics (Oparin/Haldane, then Miller-Urey flask) or arrived on meteorites. First cells: prokaryotes, anaerobic. RNA World: RNA can store code and catalyze. You already got “shared genetic code → self-replicating RNA.” The miss was “proteins are not the only catalysts → RNA World.”
Early Earth (low oxygen, UV) vs modern (oxygen + ozone)RNA World — code and catalyst
Likely on the quizIf the stem says catalyst / enzymes / “only proteins” → RNA World. If it says shared genetic code → self-replicating RNA. If it says what was in the air → inorganics, little oxygen, not low UV.
Not sure about this bit?
Same chapter, two quiz outfits. That is the easy miss.
1
Shared genetic code
Self-replicating RNA can pass information along. You already got this right on 01.03.
2
Catalysts
People thought only protein enzymes sped reactions. RNA can catalyze too. That is RNA World, not Miller-Urey.
3
Wrong famous names
Miller-Urey = flask amino acids. Oparin/Haldane = it could happen in that air. Endosymbiosis = mitochondria, later.
Got it now? Scroll back up and re-read the section — it should land differently.
