Process
Eduqas A-Level Biology A400QS
Biological Molecules
Cell Structure and Organisation
Cell Membranes and Transport
Enzymes
Nucleic Acids and Their Functions
Importance of ATP
Photosynthesis
Respiration
Microbiology
Population Size and Ecosystems
Topic overviewPopulation growth and its measurementThe population growth curve and carrying capacityDensity dependent and density independent factorsSampling abundance and distributionEcosystems, habitats and communitiesEnergy transfer and pyramids of biomassSuccessionDecomposition and the carbon cycleThe nitrogen cycle and human interventionEutrophication and the effects of drainage
Human Impact on the Environment
Classification and Biodiversity
Topic overviewThe need for classification and the taxonomic hierarchyThe three domain and five kingdom systemsCharacteristic features of the five kingdomsAssessing relatedness by physical features and biochemistryThe species concept and the binomial systemBiodiversity, adaptation and natural selectionMeasuring biodiversity in a habitatGenetic and molecular measures of biodiversity
Mitosis and Meiosis
Sexual Reproduction in Humans
Sexual Reproduction in Plants
Inheritance
Variation and Evolution
Application of Reproduction and Genetics
Topic overviewThe Human Genome Project, other sequenced genomes and genomics in healthcareScreening embryos, stem cells and the ethical issuesGenetic fingerprinting, PCR and electrophoresis in forensic workRecombinant DNA and the production of human insulinGenetically modified crops and gene therapy
Adaptations for Gas Exchange
Topic overviewSurface area to volume ratio and gas exchange in small organismsSpecialised respiratory surfaces and the need for ventilationGills and counter current flow in bony fishThe human breathing system and its histologyVentilation and gas exchange in humansThe insect tracheal systemThe angiosperm leaf, stomata and gas exchange
Adaptations for Transport
Topic overviewVascular systems compared across animal groupsThe mammalian heart and blood vesselsThe cardiac cycle and its controlBlood, haemoglobin and dissociation curvesThe Bohr effect, chloride shift and tissue fluidThe root and the uptake of waterThe endodermis and the entry to the xylemXylem, transpiration and cohesion-tensionThe potometer and xerophytes and hydrophytesPhloem and translocation
Adaptations for Nutrition
Homeostasis and the Kidney
The Nervous System
Immunology and Disease: Disease and Its TransmissionImmunology
Immunology and Disease: AntibioticsImmunology
Immunology and Disease: The Immune ResponseImmunology
Human Musculoskeletal Anatomy: Skeletal TissuesMusculoskeletal
Topic overviewCartilage and its three typesThe composition and functions of compact boneBone remodelling and the Haversian systemRickets, osteomalacia, osteoporosis and brittle bone diseaseThe structure of skeletal muscleThe sliding filament theoryFast and slow twitch fibres, and energy for contraction
Human Musculoskeletal Anatomy: Structure and Function of the SkeletonMusculoskeletal
Human Musculoskeletal Anatomy: JointsMusculoskeletal
Neurobiology and Behaviour: The BrainNeurobiology
Neurobiology and Behaviour: NeuroscienceNeurobiology
Cell Structure and Organisation
- 5 subtopics
- 15 things to know
- Component 1
What Cell Structure and Organisation covers
Cell Structure and Organisation is one of the Core Concepts: it is taught with Component 1, Energy for Life, but may be assessed in any of the three components. It covers the nucleus and the endomembrane system, mitochondria, chloroplasts and other organelles, prokaryotic cells and viruses, cell theory, microscopy and measuring cells and comparing cells and the levels of organisation.
Where it is assessed
Component 1
Energy for Life, whose Core Concepts are also assessed in the other two papers.
Check the Eduqas specification ↗The 5 subtopics
Each one has its own page.
- The nucleus and the endomembrane systemStructure of the nuclear envelope, function of the nucleolus and structure of a ribosome.Open →
- Mitochondria, chloroplasts and other organellesStructure of a mitochondrion, structure of a chloroplast and function of centrioles.Open →
- Prokaryotic cells and virusesFunction of a bacterial capsule, function of pili on a bacterium and basic structure of a virus.Open →
- Cell theory, microscopy and measuring cellsThree principles of cell theory, why viruses are said to challenge cell theory and magnification and the resolution of a microscope.Open →
- Comparing cells and the levels of organisationTerm tissue, term organ and squamous epithelium and state where it is found.Open →
What you need to know
Answer each one before you reveal it.
Your recallNot started
Key term
Why must the microscope be recalibrated when the objective lens is changed?
Key term
What passes through a nuclear pore?
Key term
What happens in the matrix of a mitochondrion?
Key term
State the most important structural difference between a prokaryotic and a eukaryotic cell.
Key term
Name three structures found in a plant cell but not in an animal cell.
Key term
What is chromatin?
Key term
Why is the inner mitochondrial membrane folded into cristae?
Key term
In what form is the genetic material of a bacterium held?
Key term
Name a structure found in an animal cell but not in the cell of a flowering plant, and one way the vacuoles differ.
Key term
Where in a eukaryotic cell are ribosomes found?
Key term
Which part of a chloroplast contains starch grains, and why are they there?
Key term
What is a plasmid?
Key term
State the three principles of cell theory.
Key term
Compare the ribosomes and the cell wall of a bacterium with those of a plant cell.
Take Cell Structure and Organisation further
The same content, four other ways.
Questions from this topic
Each one with the model answer underneath.
- 1
Describe the structure of the nuclear envelope.
Model answer
It is a double membrane surrounding the nucleus, perforated by pores and continuous with the rough endoplasmic reticulum.
- 2
What passes through a nuclear pore?
Model answer
Messenger RNA and ribosomal subunits leave the nucleus through the pores, and nucleotides, enzymes and signalling proteins enter through them.
- 3
What is chromatin?
Model answer
The complex of DNA and histone protein in the nucleus, which is dispersed during interphase and condenses into visible chromosomes for division.
- 4
What is the function of the nucleolus?
Model answer
It manufactures ribosomal RNA and assembles it with protein into the subunits of ribosomes.
- 5
Why does a cell that is actively secreting protein usually have a large nucleolus?
Model answer
It needs to make many ribosomes to keep up with the demand for protein synthesis.
- 6
Describe the structure of a ribosome.
Model answer
It is a small organelle with no membrane, built from a large and a small subunit of ribosomal RNA and protein.
What is inside Levo
Six ways to work the same material.
Cell Structure and Organisation revision questions
- What does Cell Structure and Organisation cover in Eduqas A-Level Biology?
- 5 subtopics: the nucleus and the endomembrane system, mitochondria, chloroplasts and other organelles, prokaryotic cells and viruses, cell theory, microscopy and measuring cells and comparing cells and the levels of organisation. Each one has its own page with questions and model answers.
- How is Cell Structure and Organisation organised?
- By the Eduqas A400QS specification, subtopic by subtopic, so it matches the order you are taught it in.
Every question in Cell Structure and Organisation, on a schedule.
Attempt a question from memory, write the correct version, then attempt it again. Levo records the jump between your first attempt and your last, and brings each question back on the day you are due to forget it.
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