Bioprocessing and Biomanufacturing
Class 12 · Biotechnology
4 ideas in Class 12 Biotechnology, explained in plain words, with games and quizzes to practise.
Metabolites Worth Making
Part of: From Cells to Products
Living cells cook two product lines: everyday molecules that build and run the cell, and special extras for defence, stress cover or signalling. The extras serve medicines, cosmetics and food needs, but cells brew only traces, so engineers must scale their making.
Why it matters. Every later tank decision serves these products. Knowing which line feeds growth versus which brings value helps you set the right goal for each run.
Key words
- primary metabolite
- : A molecule needed for cell growth and upkeep.
- secondary metabolite
- : A special extra for defence or stress cover.
- scale-up
- : Growing a lab success into factory-size making.
- bioprocess
- : A steered biological run that yields a product.
- yield
- : The amount of product won per run.
Try it in two minutes
- Sort products into everyday builders versus special extras.
- Ask which line the cell cannot live without.
- Ask why traces of extras demand scaled-up making.
Try at home. Sort five home items into everyday versus special-use products.
Bioreactor Design
Part of: From Cells to Products
A bioreactor is a pampered tank giving cells steady food, air, warmth and stirring. Inside, a mixer blends, an air pipe feeds bubbles, wall plates break swirls, and a water jacket holds temperature. Different builds suit thick brews, fragile cells or huge volumes.
Why it matters. Wrong tanks starve, chill or shred cells. Reading parts lets you diagnose foaming, dead zones and cold corners fast.
Key words
- bioreactor
- : A steered tank growing cells for products.
- agitator
- : The mixer that blends tank contents.
- sparger
- : The pipe that feeds air bubbles.
- baffle
- : A wall plate that breaks swirl dead zones.
- jacket
- : A water layer holding tank temperature.
Try it in two minutes
- Name the four insides: mixer, air pipe, swirl plates, water jacket.
- Ask which part blends, airs, straightens and warms each.
- Ask which build suits fragile cells versus thick brews.
Try at home. Sketch a tank and label its four working parts.
Upstream and Running Modes
Part of: Running the Process
Upstream work readies everything before growth: cook the food and tank sterile, and raise a healthy lively starter. Then three feeding styles run the show: sealed pots with no top-ups, pots fed in sips as food runs low, and endless pots fed and tapped without pause.
Why it matters. Skimped prep invites germs and weak starts, while wrong feeding starves or drowns makers. Knowing prep plus feeding styles lets you plan any run from lab to factory.
Key words
- upstream processing
- : Prep of sterile food, tank and starter before growth.
- inoculum
- : The lively starter added to begin a run.
- batch run
- : A sealed run with no feeding after the start.
- fed-batch run
- : A run topped up in sips as food runs low.
- continuous run
- : An endless run fed and tapped without pause.
Try it in two minutes
- List prep moves: sterile food, sterile tank, lively starter.
- Ask what each feeding style adds or removes.
- Ask which style suits quick tests versus endless supply.
Try at home. Plan prep plus feeding style for one dream product.
Downstream Recovery
Part of: Running the Process
Downstream work wins the prize after growth: free the product, clear the crowd, and polish it pure. Spins and filters part cells from brews, membranes and sieves sort by size, and drying or distillation finishes the pack. Inside-cell goods need breaking open first, while outside goods pour out ready.
Why it matters. Most cost sits downstream, so smart recovery decides profit. Knowing the chain from freeing to polishing helps you rescue weak harvests.
Key words
- downstream processing
- : Recovery and polishing of product after growth.
- centrifugation
- : Spinning to part heavy cells from brews.
- filtration
- : Straining brews through fine sieves.
- reverse osmosis
- : Forcing liquid through membranes to keep goods.
- chromatography
- : Sorting molecules by grip on special beds.
Try it in two minutes
- Order the chain: free, part, sort, polish, pack.
- Ask which goods need breaking open first.
- Ask which step sorts by size.
Try at home. Order five recovery steps for one pretend harvest.
What your child will practise
- Bioreactor Design: Space Quick Fire (Quick Fire)
- Downstream Recovery: Ocean Puzzle (Clue Puzzle)
- Downstream Recovery: Ocean Quick Fire (Quick Fire)
- Metabolites Worth Making: Jungle Quick Fire (Quick Fire)
- Upstream and Running Modes: Candy Puzzle (Clue Puzzle)
- Quiz: Bioreactor Design (8 questions)
- Quiz: Downstream Recovery (8 questions)
- Quiz: Metabolites Worth Making (8 questions)
- Quiz: Upstream and Running Modes (8 questions)