LibraryScienceBiology Basics
◌Science

Science · Editorial deck

Biology Basics

Cells, genes and living systems

60 cards~10 minReferences included

Choose your chapters, your pace, and the way you learn.

✦ Set a friend challenge
Build mastery & review progress →

Your path through the deck

Learn it chapter by chapter.

Start with a chapter that catches your eye, or mix a few together in your round.

4 chapters · 60 cards
  1. 01
    Cells and organelles25 cards · ~4 min
  2. 02
    Genes and reproduction18 cards · ~3 min
  3. 03
    Evolution and classification6 cards · ~1 min
  4. 04
    Life processes and interactions11 cards · ~2 min

Taste it

Three cards to begin.

Tap any card to reveal the answer.
01
Prompt: Basic unit of life
ScienceA little curiosity
Biology concept · RECALLBasic unit of lifeThink it. Then flip it.
02
Prompt: Organelle containing most DNA in a typical eukaryotic cell
ScienceA little curiosity
Biology concept · RECALLOrganelle containing most DNA in a typical eukaryotic cellThink it. Then flip it.
03
Prompt: This organelle produces most ATP in a typical aerobic animal cell.
ScienceA little curiosity
Biology concept · RECALLThis organelle produces most ATP in a typical aerobic animal cell.Think it. Then flip it.

Searchable preview

The questions inside.

Open a question to see its answer.
  1. 01Basic unit of lifeRECALL
    Cell

    All organisms consist of one or more cells

    Share this card ↗Source: Cell (biology) ↗
  2. 02Organelle containing most DNA in a typical eukaryotic cellRECALL
    Nucleus

    Found in eukaryotic cells

    Share this card ↗Source: Cell nucleus ↗
  3. 03This organelle produces most ATP in a typical aerobic animal cell.RECALL
    Mitochondrion

    Mitochondria convert energy into ATP during aerobic respiration. Cells do not create energy, and glycolysis also makes ATP outside…

    Share this card ↗Source: Mitochondrion ↗
  4. 04Plant organelle used for photosynthesisRECALL
    Chloroplast

    Contains chlorophyll

    Share this card ↗Source: Chloroplast ↗
  5. 05Cell division for growth and repairRECALL
    Mitosis

    Produces two genetically similar cells

    Share this card ↗Source: Mitosis ↗
  6. 06Cell division producing gametesRECALL
    Meiosis

    Reduces chromosome number by half

    Share this card ↗Source: Meiosis ↗
  7. 07Cells that defend against diseaseRECALL
    White blood cells

    Also called leukocytes

    Share this card ↗Source: White blood cells ↗
  8. 08Organisms without a nucleusRECALL
    Prokaryotes

    Bacteria and archaea are prokaryotic

    Share this card ↗Source: Prokaryotes ↗
  9. 09Movement of water across a selective membraneRECALL
    Osmosis

    Water moves down its water-potential gradient

    Share this card ↗Source: Osmosis ↗
  10. 10This selective boundary controls what enters and leaves a cell.RECALL
    Cell membrane

    It is selectively permeable

    Share this card ↗Source: Cell membrane ↗
  11. 11This material fills a cell outside its nucleus and includes cytosol and organelles.RECALL
    Cytoplasm

    Many reactions occur there

    Share this card ↗Source: Cytoplasm ↗
  12. 12This cell structure makes proteins.RECALL
    Ribosome

    Ribosomes read messenger RNA

    Share this card ↗Source: Ribosome ↗
  13. 13This organelle modifies and packages proteins.RECALL
    Golgi apparatus

    It forms transport vesicles

    Share this card ↗Source: Golgi apparatus ↗
  14. 14These organelles use digestive enzymes to break down worn-out cell parts.RECALL
    Lysosomes

    They contain digestive enzymes

    Share this card ↗Source: Lysosomes ↗
  15. 15This large compartment stores water and supports turgor in many plant cells.RECALL
    Central vacuole

    It helps maintain turgor

    Share this card ↗Source: Central vacuole ↗
  16. 16This rigid cellulose-rich layer lies outside a plant cell's membrane.RECALL
    Cell wall

    It is largely made of cellulose

    Share this card ↗Source: Cell wall ↗
  17. 17This DNA-and-protein structure packages genetic material in a eukaryotic cell.RECALL
    Chromosome

    Humans normally have 46

    Share this card ↗Source: Chromosome ↗
  18. 18This type of nuclear division generally produces two genetically matching daughter nuclei for growth and repair.RECALL
    Mitosis

    Used for growth and repair

    Share this card ↗Source: Mitosis ↗
  19. 19This organelle carries out photosynthesis.RECALL
    Chloroplast

    It contains chlorophyll

    Share this card ↗Source: Chloroplast ↗
  20. 20This molecule supplies readily usable energy for cellular processes; give its common three-letter abbreviation.RECALL
    ATP

    It powers many cellular processes

    Share this card ↗Source: Adenosine triphosphate ↗
  21. 21This type of organism lacks a membrane-bound nucleus.RECALL
    Prokaryote

    Bacteria and archaea are prokaryotes

    Share this card ↗Source: Prokaryote ↗
  22. 22This type of organism has cells with a nucleus and membrane-bound organelles.RECALL
    Eukaryote

    Animals, plants, fungi and protists are eukaryotes

    Share this card ↗Source: Eukaryote ↗
  23. 23This infectious agent contains DNA or RNA in a protein coat and replicates only inside host cells.RECALL
    Virus

    It needs a host cell to replicate

    Share this card ↗Source: Virus ↗
  24. 24These immune-system proteins bind to specific antigens.RECALL
    Antibodies

    B cells produce them

    Share this card ↗Source: Antibodies ↗
  25. 25This nervous-system cell carries electrical signals and communicates across synapses.RECALL
    Neuron

    Neurons communicate at synapses

    Share this card ↗Source: Neuron ↗
  26. 26Molecule carrying genetic instructionsRECALL
    DNA

    Deoxyribonucleic acid

    Share this card ↗Source: DNA ↗
  27. 27Passing traits from parents to offspringRECALL
    Heredity

    Genes are units of heredity

    Share this card ↗Source: Heredity ↗
  28. 28Change in a DNA sequenceRECALL
    Mutation

    Creates genetic variation

    Share this card ↗Source: Mutation ↗
  29. 29Sugar found in DNARECALL
    Deoxyribose

    A five-carbon sugar

    Share this card ↗Source: Deoxyribose ↗
  30. 30RNA base replacing thymineRECALL
    Uracil

    It pairs with adenine

    Share this card ↗Source: Uracil ↗
  31. 31Stable internal body conditionsRECALL
    Homeostasis

    Temperature regulation is one example

    Share this card ↗Source: Homeostasis ↗
  32. 32Two intertwined strands form this usual shape of DNA.RECALL
    Double helix

    Two strands pair by complementary bases

    Share this card ↗Source: Double helix ↗
  33. 33This hereditary unit is a DNA sequence that contributes to a functional product.RECALL
    Gene

    Genes are segments of DNA

    Share this card ↗Source: Gene ↗
  34. 34This term names an alternative version of a gene.RECALL
    Allele

    Different alleles can affect a trait

    Share this card ↗Source: Allele ↗
  35. 35This term describes an organism's genetic makeup.RECALL
    Genotype

    It describes its alleles

    Share this card ↗Source: Genotype ↗
  36. 36This term describes an organism's observable characteristics.RECALL
    Phenotype

    Environment can influence them

    Share this card ↗Source: Phenotype ↗
  37. 37Under simple Mendelian inheritance, this kind of allele determines the trait when paired with a recessive one.RECALL
    Dominant allele

    It can mask a recessive allele

    Share this card ↗Source: Dominant allele ↗
  38. 38This term names an alteration in a DNA sequence.RECALL
    Mutation

    Effects can be neutral, harmful or beneficial

    Share this card ↗Source: Mutation ↗
  39. 39This reduction division produces haploid cells and contributes to gamete formation in animals.RECALL
    Meiosis

    It reduces chromosome number by half

    Share this card ↗Source: Meiosis ↗
  40. 40This process combines two gametes to form a zygote.RECALL
    Fertilization

    It forms a zygote

    Share this card ↗Source: Fertilization ↗
  41. 41This regulation keeps internal conditions within a viable range.RECALL
    Homeostasis

    Temperature regulation is an example

    Share this card ↗Source: Homeostasis ↗
  42. 42This evolutionary mechanism occurs when heritable traits affect survival and reproductive success.RECALL
    Natural selection

    Evolution also involves mutation, genetic drift and gene flow. Natural selection is one mechanism, not a synonym for every evolutionary…

    Share this card ↗Source: Natural selection ↗
  43. 43This term often refers to a microbial community together with its genes and surrounding environment.RECALL
    Microbiome

    Microbiota specifically names the organisms. Microbiome is often used more broadly, though definitions vary between researchers.

    Share this card ↗Source: Microbiome ↗
  44. 44This naturalist developed natural selection independently of Alfred Russel Wallace and published On the Origin of Species.RECALL
    Charles Darwin

    Alfred Russel Wallace developed a similar idea

    Share this card ↗Source: Charles Darwin ↗
  45. 45Relationship where both species benefitRECALL
  46. 46Kingdom that includes mushroomsRECALL
    Fungi

    They absorb nutrients

    Share this card ↗Source: Fungi ↗
  47. 47This inherited feature improves survival or reproductive success in a particular environment.RECALL
    Adaptation

    It is shaped over generations

    Share this card ↗Source: Adaptation ↗
  48. 48This naming system combines a genus name with a specific epithet.RECALL
    Binomial nomenclature

    Each species has genus and species names

    Share this card ↗Source: Binomial nomenclature ↗
  49. 49In Carl Woese's 1990 classification system, this rank sits above kingdom.RECALL
    Domain

    The three-domain system recognizes Bacteria, Archaea and Eukarya. Scientific classification can change as evidence about ancestry changes.

    Share this card ↗Source: Domain (taxonomy) ↗
  50. 50Process by which plants make sugarsRECALL
    Photosynthesis

    Uses light, carbon dioxide and water

    Share this card ↗Source: Photosynthesis ↗
  51. 51Organism that makes its own foodRECALL
  52. 52Organism that breaks down dead matterRECALL
    Decomposer

    Fungi and many bacteria do this

    Share this card ↗Source: Decomposer ↗
  53. 53Protein that speeds a reactionRECALL
    Enzyme

    A biological catalyst

    Share this card ↗Source: Enzyme ↗
  54. 54Vessels carrying blood away from the heartRECALL
    Arteries

    Pulmonary arteries are an exception in oxygen level

    Share this card ↗Source: Arteries ↗
  55. 55Gas released by photosynthesisRECALL
    Oxygen

    Comes from splitting water molecules

    Share this card ↗Source: Oxygen ↗
  56. 56Study of living thingsRECALL
    Biology

    From Greek words for life and study

    Share this card ↗Source: Biology ↗
  57. 57This biological catalyst accelerates a reaction without being consumed.RECALL
    Enzyme

    It speeds reactions without being consumed

    Share this card ↗Source: Enzyme ↗
  58. 58This preparation trains immune responses against a pathogen or its products.RECALL
    Vaccine

    It creates immune memory

    Share this card ↗Source: Vaccine ↗
  59. 59This endocrine messenger travels to target tissues to influence their activity.RECALL
    Hormone

    Insulin is one example

    Share this card ↗Source: Hormone ↗
  60. 60This junction lets a neuron communicate with another cell.RECALL
    Synapse

    Signals cross it using chemicals or electricity

    Share this card ↗Source: Synapse ↗

Ready when you are

Flip the first card.

Study at your pace, or test what stayed with you. Your local progress is saved as you go.