Biology tools
Cell, molecular, human, and population biology tools
- custom
AI biology concept explainer
Roadmap for AI-guided explanations.
Open tool - custom
AI biology diagram generator
Roadmap for diagrams.
Open tool - custom
AI biology flashcards
Roadmap for flashcards.
Open tool - custom
AI biology MCQ generator
Roadmap for MCQ sets.
Open tool - custom
AI biology notes
Roadmap for structured notes.
Open tool - custom
AI case study helper
Roadmap for clinical-style cases.
Open tool - custom
AI lab assistant
Roadmap for protocol help.
Open tool - custom
AI NEET biology assistant
Roadmap for NEET coaching.
Open tool - formula calculator
Allele frequency
Same HWE helper from genotype counts.
Open tool - formula calculator
Antibody concentration (A = εcl)
Beer–Lambert with path length.
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ATP yield (guide)
Textbook glucose ATP ranges.
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Bacterial growth (exponential)
N = N₀ 2^{t/t_d}.
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Bacterial growth curve
Lag, log, stationary, death phases.
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Biology data analyzer
Mean, SD, min, max from pasted numbers.
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Biology flashcards (how-to)
Guidance for making decks.
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Biology formula sheet
Starter formula list.
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Biology mind map (template)
How to branch concepts.
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Biology revision planner
Study hours from days × hours/day.
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Biology revision tracker
Topics revised vs planned.
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Biology study time planner
Split minutes across items with buffer.
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Biology topic tracker
Percent of units covered.
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Biology units reference
Common length, volume, and mass prefixes.
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Blood pressure categories
Simplified ACC/AHA-style labels.
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Blood volume estimate
~70 mL/kg adult order of magnitude.
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BMI calculator
Body mass index and coarse category.
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BMR calculator
Mifflin–St Jeor resting estimate.
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Body fat (Navy method)
Circumference estimate.
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Calorie intake (TDEE)
BMR × activity factor.
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Carrying capacity (concept)
What K means in dN/dt = rN(1−N/K).
Open tool - formula calculator
Cell cycle phases
Interphase and mitosis outline.
Open tool - formula calculator
Cell division (mitosis / meiosis)
Concise phase outline for mitosis vs meiosis.
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Centrifugation RCF / RPM
Convert RPM ↔ RCF with rotor radius.
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CFU calculator
CFU/mL = colonies × dilution / volume plated.
Open tool - table utility
Codon table
RNA codon to amino acid listing.
Open tool - formula calculator
Colony count → CFU/mL
Plate count with dilution.
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Concentration converter (mg/mL ↔ mol/L)
mg/mL to g/L and mol/L with MW.
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CRISPR NGG scan (basic)
Find NGG and 20 nt upstream on forward strand.
Open tool - formula calculator
Crop yield
Area × yield per hectare.
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Daily water intake
33 mL/kg heuristic.
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Diffusion flux magnitude
|J| ≈ D|ΔC|/Δx.
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DNA complement
Watson–Crick complement.
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DNA molecular weight (ss approx)
Approximate single-strand DNA mass.
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DNA sequence analyzer
Length, base counts, GC%.
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DNA to RNA transcription
T→U on cleaned coding-strand sequence.
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Doubling time
t_d = ln(2)/r for exponential growth.
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Drug dose (mg/kg)
Mass dose from mg/kg and body weight.
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ECG intervals (reference)
Typical adult rest intervals.
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Ecological footprint (note)
Why full calculators need external factors.
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Enzyme activity (toy)
v = k[E][S] mass-action sketch.
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Evolutionary distance (p-distance)
Uncorrected DNA mismatch proportion.
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Experiment time (seconds)
Seconds to hours and minutes.
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Experimental bar preview
Simple horizontal bars from values.
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Exponential population growth
N = N₀e^{rt}.
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FASTA DNA summary
First FASTA record stats.
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First-order decay
N(t) = N₀e^{-kt}.
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Food chain (10% rule)
E_n = E₀ × 0.1^n.
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GC content
GC percentage for DNA.
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Gene expression log₂ fold change
log₂(treatment/control).
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Generation time
Generation time from doubling time and doublings per generation.
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Genetic cross simulator
Monohybrid Punnett outcomes.
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Genetic drift (Wright–Fisher one step)
One generation binomial allele sampling.
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Genotype calculator
Same monohybrid Punnett engine for offspring genotypes.
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Growth rate calculator
Continuous rate r from two population counts and elapsed time.
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Hardy–Weinberg equilibrium
Allele frequencies and expected genotype frequencies from counts.
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Heart rate zones
Tanaka max HR estimate and zone range.
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Ideal weight (Devine)
Devine formula from height.
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Immune response (outline)
Innate vs adaptive concept summary.
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Infection spread (early exponential toy)
I = I₀e^{rt} sketch.
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Inheritance patterns (guide)
Autosomal dominant/recessive, X-linked, mitochondrial checklist.
Open tool - formula calculator
Km from v, Vmax, S
Invert Michaelis–Menten for Km.
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Lab result z-score (toy)
z from value vs reference mean and SD.
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Linear regression (bio experiments)
OLS slope, intercept, R².
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Logistic growth
N(t) with carrying capacity K.
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Lung volumes (tidal sketch)
Tidal volume from mL/kg and mass.
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Medical risk scores (note)
Use validated ASCVD/Framingham calculators.
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Metabolic rate (guide)
BMR vs TDEE pointers.
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mg ↔ mL (from mg/mL)
Volume from mass and concentration.
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Michaelis–Menten rate
v = Vmax·S/(Km+S).
Open tool - formula calculator
Micrometer ↔ nanometer
1 µm = 1000 nm.
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Microscopy magnification
Ocular × objective total magnification.
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Molecular docking (note)
Pointer to docking software.
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Mutation impact (guide)
Silent, missense, nonsense, frameshift overview.
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Mutation rate estimate
Mutations per site per generation.
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NEET attempt analyzer
Accuracy and attempt mix from counts.
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NEET biology score (illustrative)
+/− marking sketch for biology section.
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NEET rank toy model
Illustrative rank from percentile.
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NEET section mark share
Biology vs physics vs chemistry % from mark totals.
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Neuron signal speed
distance / time.
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Nutrient deficiency hints
Rough leaf symptom patterns.
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Oligo Tm (Wallace)
Wallace rule for short DNA oligos.
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One-sample t statistic
t vs hypothesized mean — compare to table.
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Organ functions (reference)
Major organ roles overview.
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Organelle functions
Short eukaryotic organelle roles.
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Osmosis comparison
Toy inside vs outside concentration comparison.
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Oxygen saturation
Why SpO₂ needs measurement.
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Pathway databases (pointer)
KEGG, Reactome, WikiPathways.
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PCR primer dilution
C₁V₁ = C₂V₂ for stock to working concentration.
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pH and [H⁺] (bio context)
pH ↔ hydrogen ion molarity.
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Phenotype probability
Autosomal dominant/recessive with complete dominance from allele frequency p.
Open tool - formula calculator
Photosynthesis rate (toy index)
η × light × area placeholder.
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Phylogenetic trees (guide)
Pointer to proper tree software.
Open tool - formula calculator
Plant growth rate
r = ln(M₁/M₀)/Δt on mass proxy.
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Population density
D = N / area.
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Protein molecular weight
Linear chain mass from residue masses.
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Protein sequence analyzer
Length and amino-acid counts.
Open tool - formula calculator
Protein structure (resources)
Pointer to AlphaFold and homology modeling.
Open tool - formula calculator
Punnett square (monohybrid)
AA, Aa, aa parents — offspring genotype ratios.
Open tool - formula calculator
Reflex time (toy)
path/speed + delay sketch.
Open tool - formula calculator
Restriction enzyme finder
Search common Type II sites in DNA.
Open tool - formula calculator
Reverse complement
Reverse then complement DNA.
Open tool - formula calculator
RNA to protein translation
Standard code; stops at first stop codon.
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Sample dilution factor
Multiply serial dilution factors.
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Serial dilution factor
Multiply dilution steps.
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Shannon diversity
H = −Σ p ln p from species counts.
Open tool - formula calculator
Sleep cycle wake time
Bedtime + n×90 min rough wake clock.
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Solute potential (Ψ_s)
Ψ_s ≈ −iCRT with stated units caveat.
Open tool - formula calculator
Solution preparation (dilution)
C₁V₁ = C₂V₂ for molarity dilutions.
Open tool - formula calculator
Sterilization (D-value guide)
Concepts for thermal sterilization.
Open tool - formula calculator
Surface area / volume (cube)
Cube SA, V, and SA/V.
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Survival rate
Percent survived / initial cohort.
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Synapse delay sum
Serial synaptic delays toy model.
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Trait probability
Phenotype split from p under complete dominance.
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Transpiration (E ∝ g×VPD)
Proportional estimate.
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Trophic energy transfer
E_n = E₀ × η^n with custom η.
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Vaccine dose per vial
Total mass or volume divided by containers.
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VO₂ max (Cooper)
From 12-minute run distance.
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Water potential comparison
Compare Ψ_in vs Ψ_out for net water direction (toy).
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