BIOL1020 Genes, Cells, and Evolution
The Complete Exam Bible · S2 2026BIOL1020 Overview
- University of Queensland
- Semester 2 2026
- Level 1 biology
- MCQ and SAQ final
- Learn.UQ course materials
Genes, Cells, and Evolution introduces biology as a connected set of mechanisms rather than a catalogue of terms. It begins with chemical interactions that make water, proteins and membranes behave differently, then compares prokaryotic and eukaryotic cells and follows how compartments organise metabolism.
- Assessed by Practical participation, two mini tests and a weighted end-of-semester exam.
- Hardest transition Moving from memorised terminology to a complete mechanism under changed conditions.
- Core exam move Locate the first affected step, then trace the consequence through each intermediate.
- How to prepare Redraw processes from memory and answer original short questions without notes.
How BIOL1020 is assessed
| Component | Weight | Format |
|---|---|---|
| Assessment Task 1 Practical preparation and participation | 10% | Prepare fully and participate in practical work |
| Assessment Task 2 Mini Test 1 | 15% | Short-answer and/or problem-solving questions from course learning activities |
| Assessment Task 3 Mini Test 2 | 15% | Short-answer and/or problem-solving questions from course learning activities |
| Final exam · hurdle | 60% | Multiple-choice and short-answer questions; at least 45% on the exam is required |
Published weights total 100%. The end-of-semester exam carries a 45% component hurdle, and at least 50% across all assessment combined is also required. The captured UQ material does not state duration or permitted materials; check Learn.UQ for current logistics.
What BIOL1020 covers
Twelve chapters move from chemical interactions and cell organisation through energy, genetic information, inheritance, biotechnology and population change.
Chemistry, Polarity and Membranes
Electronegativity, weak interactions, water, hydrophobic effects and phospholipid bilayer assemblyChemical structure becomes biological behaviour through electron distribution and molecular shape.
- Electronegativity and partial charge
- Molecular geometry and net polarity
- Hydrogen bonding and electrostatic attraction
- Hydrophobic clustering in water
- Phospholipid bilayer assembly
- Selective membrane permeability
Cells, Organelles and Biological Scale
Prokaryotic and eukaryotic organisation, cellular scale, compartmentation, organelles and protein trafficAll cells share a membrane, genetic material, ribosomes and energy-dependent chemistry, but prokaryotic and eukaryotic cells organise those functions differently.
- Shared features of all cells
- Bacterial structures and cell walls
- Nucleus and chromatin organisation
- Plant and animal cell differences
- Surface area and cellular scale
- Endomembrane protein traffic
Carbohydrates, Lipids and Proteins
Monomer chemistry, polymer bonds, lipid amphipathy, protein folding and structure-to-function reasoningMacromolecule questions ask how chemistry becomes function.
- Glycosidic bond orientation
- Starch, glycogen and cellulose
- Triacylglycerol and phospholipid structure
- Peptide bond formation
- Four levels of protein structure
- Side-chain chemistry and folding
Cellular Energy and Respiration
Free energy, activation barriers, ATP coupling, respiration stages, proton gradients and pathway perturbationsCellular energy questions combine thermodynamics with pathway logic.
- Exergonic and endergonic reactions
- Activation barriers and enzymes
- ATP hydrolysis and reaction coupling
- Glycolysis and pyruvate oxidation
- Citric-acid cycle
- Electron transport and chemiosmosis
DNA Replication and the Cell Cycle
Polymerase direction, leading and lagging synthesis, chromosome states, checkpoints, mitosis and cytokinesisDNA replication duplicates genetic material before division, while mitosis and cytokinesis distribute that material into daughter cells.
- DNA polymerase direction
- Leading and lagging strands
- Okazaki fragment processing
- Interphase and mitotic phase
- Cell-cycle checkpoints
- Mitosis and cytokinesis
Transcription, Splicing and Translation
DNA templates, RNA processing, codons, anticodons, reading frames and protein sequence outcomesGene expression transfers information from DNA into RNA and then changes languages from nucleotide sequence to amino-acid sequence.
- Central dogma of molecular biology
- DNA template orientation
- Pre-mRNA and RNA splicing
- Alternative exon combinations
- Codons, anticodons and tRNA
- Frameshift and stop mutations
Viruses and Information Flow
Genome routes to messenger RNA, virus-specific enzymes, lytic and lysogenic cycles and host dependenceViral diversity becomes manageable when every genome is traced toward messenger RNA that host ribosomes can read. This chapter defines the minimal virus, explains host dependence and compares DNA, positive-sense RNA and retroviral information routes.
- Minimal viral structure
- Obligate intracellular dependence
- Genome routes to messenger RNA
- RNA-dependent RNA polymerase
- Reverse transcription and provirus
- Lytic and lysogenic cycles
Mutation and Bacterial Gene Transfer
Alleles, coding and regulatory change, somatic and germline effects, conjugation, transformation and transductionGenetic variation arises when DNA sequence changes or when existing DNA moves between organisms. This chapter links point mutations, insertions, deletions and larger rearrangements to coding, splicing and regulatory outcomes.
- Alleles, genotype and phenotype
- Coding and regulatory mutation
- Loss and gain of function
- Somatic and germline change
- Conjugation and plasmids
- Transformation and transduction
Meiosis and Mendelian Inheritance
Segregation, independent assortment, recombination, test crosses, gamete probabilities and nondisjunctionMeiosis creates haploid gametes and reshuffles alleles through segregation, independent assortment and recombination.
- Homologues and sister chromatids
- Meiosis I and meiosis II
- Segregation and assortment
- Recombination between homologues
- Test-cross inference
- Nondisjunction and aneuploidy
Recombinant DNA, PCR and Synthetic Biology
Restriction and ligation, plasmid cloning, primer geometry, gel controls, selection and screeningMolecular biotechnology is a chain of claims supported by different tools. This chapter follows restriction cutting, compatible ends, ligation, plasmid transformation, selection and insert screening.
- Restriction-enzyme recognition
- Compatible ends and DNA ligase
- Plasmid vectors and transformation
- PCR primer orientation
- Gel electrophoresis and size
- Selection, screening and controls
Natural Selection and Evolutionary Change
Heritable variation, fitness, unequal reproduction, selection, genetic drift and population-size effectsNatural selection changes the composition of populations when heritable variants differ in reproductive success.
- Definition of population evolution
- Conditions for natural selection
- Fitness and reproductive success
- Heritable and environmental variation
- Genetic drift and sampling
- Population size and selective efficiency
Genome Evolution and CRISPR
Genome architecture, non-coding DNA, duplication, mobile elements, horizontal transfer and programmable targetingGenomes evolve through more than point mutation. This chapter compares viral, prokaryotic and eukaryotic architecture, explains why genome size does not rank organism complexity, and separates introns, exons and transposable elements.
- Genome architecture across organisms
- C-value paradox and non-coding DNA
- Introns, exons and transposons
- Gene and genome duplication
- Horizontal transfer and gene families
- CRISPR targeting and regulation
The middle of the course tracks biological information: DNA replication, the cell cycle, transcription, RNA splicing, translation, viral genome strategies, mutation and horizontal gene transfer. Later chapters follow chromosomes through meiosis, use Mendelian crosses to infer genotype, and connect restriction enzymes, plasmids, PCR and gels to experimental evidence.
The final scale change is from organisms to populations and genomes, where natural selection, genetic drift, duplication, transposable elements and CRISPR reveal different ways biological variation is produced or filtered.
The UQ course material describes the opening weeks as content-heavy for students without high-school biology and warns that the pace increases quickly.
The practical response is to learn causal chains early. Ask what interacts, where it happens, which direction information or matter moves, and what changes if one step fails. This guide makes those chains visible and then tests them with original questions based on the published MCQ, SAQ and problem-solving styles.
The four assessment components total 100%.
Practical preparation and participation contributes 10%, each mini test contributes 15%, and the end-of-semester exam contributes 60%. The final exam uses multiple-choice and short-answer questions. A genuine exam hurdle applies: students must achieve at least 45% on the final and at least 50% across all assessment combined.
The captured material does not state the exam duration or permitted materials, so current logistics should be confirmed on Learn.UQ.
Worked example · free
From amino-acid substitution to altered protein function
- +1Identify the primary change. The substitution alters the amino-acid sequence and places a charged side chain where a non-polar one was buried.
- +1Name the interaction change. The charged group interacts poorly with the hydrophobic core and more favourably with water or opposite charges.
- +1Predict folding. The protein may rearrange, expose core residues or lose the geometry that stabilises its tertiary structure.
- +1Connect to function. If the active site or binding surface changes shape, catalytic activity can decrease or change.
Key terms
- Polarity
- Unequal charge distribution in a bond or molecule that changes interactions with water and other charged regions.
- Amphipathic Molecule
- A molecule containing both water-compatible and hydrophobic regions, allowing structures such as phospholipid bilayers.
- Organelle
- A specialised membrane-bound compartment in a eukaryotic cell that concentrates or separates particular processes.
- Activation Energy
- The energy barrier reactants must cross before a chemical reaction can proceed.
- Oxidative Phosphorylation
- ATP production driven by a proton gradient generated through electron transport across a membrane.
- Sister Chromatids
- The two replicated DNA molecules of a chromosome that remain associated before separation.
- RNA Splicing
- The processing step that removes introns and joins retained exons in a eukaryotic RNA transcript.
- Reading Frame
- The grouping of a nucleotide sequence into consecutive codons used during translation.
- Horizontal Transfer
- Movement of genetic material between organisms outside parent-to-offspring inheritance.
- Independent Assortment
- The independent orientation of different homologous chromosome pairs during meiosis, producing varied gamete combinations.
- Genetic Drift
- Random change in allele frequency caused by sampling, with stronger proportional effects in small populations.
- Transposable Element
- A DNA sequence able to move or copy itself to new genomic positions and alter genome organisation.
BIOL1020 FAQ
How hard is this course?
The course material says the opening weeks are content-heavy for students without high-school biology and that the pace increases quickly. Difficulty comes from connecting broad content across chemistry, cells, genetics and evolution. Regular mechanism practice from the first week is more effective than leaving terminology revision until the exam period.
How is the course assessed?
Practical preparation and participation is worth 10%, Mini Test 1 is worth 15%, Mini Test 2 is worth 15%, and the end-of-semester exam is worth 60%. The weights total 100%. The final exam also has a 45% component hurdle, alongside a 50% combined course requirement.
What is the final exam format?
The captured UQ course introduction states that the final contains multiple-choice questions and short-answer questions. It does not state duration or permitted materials in the available files. Check Learn.UQ and the official timetable for the current sitting instructions rather than relying on an inferred format.
What do the mini tests cover?
The course introduction says mini-test questions draw from lectures, assigned readings, online learning, tutorials and practicals, using short-answer and/or problem-solving formats. Treat online-learning content as examinable even when a lecture does not repeat it, and use each mini test as a checkpoint on integrated understanding.
Are past papers included here?
The source folder contains practice mini-test questions and one mini-test example with answers, but it does not contain a complete past final. The UQ course introduction points students to old final exams through the Library website. This guide uses original questions and does not reproduce or lightly rewrite released stems.
What is the best way to study?
Redraw each process with labelled arrows, then explain one changed condition from the first affected step to the final outcome. Alternate rapid concept discrimination for multiple choice with complete causal paragraphs for short answers. Check every sequence orientation, compartment and direction word before accepting an answer.
Questions students ask in each BIOL1020 chapter
- How does electronegativity affect polarity?
- When bonded atoms attract shared electrons unequally, electron density shifts toward the more electronegative atom. This creates partial negative and positive regions. Molecular shape then decides whether different bond dipoles reinforce or cancel, so bond polarity alone does not always make the whole molecule strongly polar. Chapter 01 · Chemistry, Polarity and Membranes
- What do all cells have in common?
- Cells use a plasma membrane to separate themselves from their surroundings, DNA as genetic material, ribosomes for protein synthesis and ATP-linked chemistry for cellular work. Structures such as a nucleus, chloroplast or peptidoglycan wall vary among groups and therefore provide classification evidence. Chapter 02 · Cells, Organelles and Biological Scale
- Why can humans digest glycogen but not cellulose?
- Glycogen uses alpha glycosidic linkages that human digestive enzymes can hydrolyse, while cellulose uses beta linkages in a different orientation. Beta-linked chains align into hydrogen-bonded fibres, and humans lack the enzyme needed to break that linkage efficiently. Chapter 03 · Carbohydrates, Lipids and Proteins
- Do enzymes make reactions exergonic?
- No. Enzymes lower the activation barrier and increase the rate at which equilibrium is approached, but they do not change the free energies of reactants and products. An endergonic reaction still needs coupling or another energy input to proceed net forward. Chapter 04 · Cellular Energy and Respiration
- Why is there a leading and lagging strand?
- The parental strands are antiparallel, while DNA polymerase can extend only in the 5-prime-to-3-prime direction. One new strand can therefore follow the opening fork continuously, but the other must be built away from it in short fragments that are later joined. Chapter 05 · DNA Replication and the Cell Cycle
- What does the central dogma describe?
- It describes cellular information flow from DNA to RNA through transcription and from mRNA to protein through translation. DNA replication copies stored information, while transcription changes the molecule but keeps nucleotide language and translation converts codons into an amino-acid sequence. Chapter 06 · Transcription, Splicing and Translation
- Why must viral genomes produce messenger RNA?
- Host ribosomes translate readable messenger RNA into protein. DNA viruses transcribe it, positive-sense RNA genomes can serve directly as messages, and other RNA viruses use specialised polymerases or a DNA intermediate. Different starting genomes therefore converge on the same translational requirement. Chapter 07 · Viruses and Information Flow
- Are all mutations harmful?
- No. A mutation can be silent, neutral in the current environment, harmful or beneficial. Its effect depends on sequence location, molecular consequence, cell type and environment. Genetic-code redundancy can preserve the amino acid after some substitutions, while regulatory changes may alter expression without changing protein sequence. Chapter 08 · Mutation and Bacterial Gene Transfer
- How does meiosis create genetic variation?
- Homologous chromosomes segregate, different chromosome pairs assort independently, and crossing over recombines DNA between homologues. Random fertilisation then joins independently produced gametes. Together these processes create allele combinations that differ from either parent's complete chromosome set. Chapter 09 · Meiosis and Mendelian Inheritance
- How do PCR primers define the product?
- Each primer binds a different template strand and provides a 3-prime end from which polymerase extends 5-prime to 3-prime. Their binding sites set the product boundaries, and their extendable ends must face into the target region for exponential amplification. Chapter 10 · Recombinant DNA, PCR and Synthetic Biology
- What conditions are needed for natural selection?
- Individuals must vary, some variation must be heritable, more offspring must be produced than can all reproduce, and survival or reproduction must be non-random with respect to the traits. Without inheritance, a filtered phenotype does not reliably create an evolutionary response. Chapter 11 · Natural Selection and Evolutionary Change
- Why does genome size not equal organism complexity?
- Eukaryotic genomes contain different amounts of non-coding, repetitive and mobile DNA, so size can expand without a proportional increase in protein-coding genes. Regulatory organisation, gene interaction and expression patterns also influence phenotype, which is why the relationship is not a simple ranking. Chapter 12 · Genome Evolution and CRISPR
How to study for the exam
Build revision around twelve mechanism maps, one per chapter. Start each session by drawing a process without notes: a bilayer, a compartment route, respiration, a replication fork, the central dogma, a viral route to messenger RNA, meiosis or natural selection. Label arrows with actions such as transcribe, separate, oxidise or transfer, because stage names alone do not explain change.
Next, alter one component and trace what accumulates, disappears or changes direction. Finish with two timed responses: one rapid discrimination question for MCQ accuracy and one short causal explanation for SAQ fluency. Keep a correction log organised by error type, including strand orientation, chromosome phase, compartment, interaction and population mechanism.
Revisit the error by solving a new example rather than rereading the old answer. In the final week, prioritise retrieval across the whole course because the UQ material says lectures, readings, online learning, tutorials and practicals can all feed the mini-test style, and the final itself uses MCQs and SAQs. Confirm current exam logistics on Learn.UQ.
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