Key term
Edexcel GCSE Combined Science Biology 1SC0
Key Concepts in Biology
Topic overviewEukaryotic and prokaryotic cellsSpecialised cells and their adaptationsMicroscopes and magnification calculationsSize, scale and units in cell biologyEnzyme action and denaturationFactors affecting enzyme activityEnzymes in synthesis and digestion, and rate calculationsDiffusion, osmosis and active transportOsmosis in potatoes and percentage change in mass
Cells and Control
Genetics
Topic overviewMeiosis and the formation of gametesDNA structure, genes and the genomeExtracting DNA from fruitAlleles, genotype and phenotypeMonohybrid crosses and sex determinationProbability and ratios from genetic crossesCauses of variation: genes and environmentThe Human Genome ProjectGenetic variation and the effects of mutation
Natural Selection and Genetic Modification
Health, Disease and the Development of Medicines
Topic overviewHealth, disease and susceptibilityPathogens and common infectionsHow pathogens spread, and the virus life cycleSexually transmitted infectionsPhysical barriers and chemical defencesThe immune system, immunisation and herd immunityAntibiotics and developing new medicinesLifestyle factors and non-communicable diseaseTreatments for cardiovascular disease
Plant Structures and Their Functions
Animal Coordination, Control and Homeostasis
Exchange and Transport in Animals
Topic overviewWhy multicellular organisms need exchange surfacesAlveoli and gas exchangeThe blood and its componentsArteries, veins and capillariesThe heart and the circulatory systemCellular respiration as an exothermic reactionAerobic and anaerobic respiration comparedInvestigating the rate of respirationCardiac output, stroke volume and heart rate
Ecosystems and Material Cycles
Key Concepts in Biology
Eukaryotic and prokaryotic cells
- 3 things to know
- Papers 1 and 2
Overview
What makes a cell eukaryotic, the functions of the nucleus, partially permeable membrane, mitochondria and ribosomes, how the cellulose cell wall, chloroplasts and permanent vacuole suit plant cells, and the circular chromosomal DNA, plasmids, flagellum and smaller ribosomes of a bacterium.
What you need to know
Answer each one before you reveal it.
Your recallNot started
Key term
Explain why muscle cells contain very large numbers of mitochondria.
Key term
State the function of ribosomes.
Questions from this subtopic
Each one with the model answer underneath.
- 1
What is the defining feature of a eukaryotic cell?
Model answer
Its genetic material is enclosed inside a nucleus surrounded by a membrane.
- 2
Name two types of organism whose cells are eukaryotic.
Model answer
Animals and plants both have eukaryotic cells.
- 3
State the function of the nucleus in an animal cell.
Model answer
It contains the chromosomal DNA that controls the activities of the cell.
- 4
Explain why a cell membrane is described as partially permeable.
Model answer
It lets some substances pass into and out of the cell while holding others back, so it controls what enters and leaves.
- 5
Explain why muscle cells contain very large numbers of mitochondria.
Model answer
Mitochondria are the site of aerobic respiration, and contracting muscle needs a large and continuous supply of energy.
- 6
State the function of ribosomes.
Model answer
Ribosomes are where amino acids are joined together to make proteins.
Other ways to work this
The same content, four other ways.
What is inside Levo
Six ways to work the same material.
Every question in Key Concepts in Biology, 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.
Or £46 a year, about £3.83 a month. Cancel anytime.