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Key Facts: Craftsman Bio Process Exam

60 items

Official written CBT question count

Q-Net Craftsman qualification specification (2026)

60 minutes

Written examination time limit

Q-Net national technical qualification CBT rules

60 / 100

Passing mark (at least 36/60 items correct)

National Technical Qualifications Act Enforcement Rules

KRW 14,500

Official written CBT registration fee

Q-Net portal fee schedule (checked 2026)

2 years

Exemption period for written exam pass

National Technical Qualifications Act Enforcement Decree Article 21

바이오공정기능사 is HRD Korea's craftsman-grade qualification established in 2026 under MOTIE. The 60-minute written CBT features 60 four-option items (passing score: 60/100), testing cell culture, bioreactor operation, chromatography purification, and GMP testing. The official written fee is KRW 14,500 on Q-Net. OpenExamPrep provides independent English MCQ practice, not an official translation or practical simulation.

Sample Craftsman Bio Process Practice Questions

Try these sample questions to review concepts for the Craftsman Bio Process exam. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.

1Which of the following is a key cellular characteristic distinguishing prokaryotic production hosts such as Escherichia coli (대장균) from eukaryotic hosts such as Chinese Hamster Ovary (CHO 세포)?
A.Prokaryotes lack a membrane-bound nucleus and endomembrane organelles such as the endoplasmic reticulum and Golgi apparatus
B.Prokaryotes possess 80S cytoplasmic ribosomes instead of 70S ribosomes
C.Prokaryotes have a nuclear envelope containing linear chromosomes wrapped around histone proteins
D.Prokaryotes naturally perform complex human-like N-linked glycosylation with terminal sialic acid addition
Explanation: Prokaryotes like E. coli lack membrane-bound organelles, including a true nucleus, endoplasmic reticulum (ER), and Golgi apparatus. Because they lack an ER and Golgi apparatus, bacteria cannot carry out complex post-translational modifications such as human-like N-glycosylation. CHO cells are eukaryotic and possess these organelles, making them the industry standard for producing full-length therapeutic monoclonal antibodies.
2In microbial and mammalian batch cell growth kinetics, what is the characteristic feature of the exponential growth phase (대수증식기, Log phase)?
A.The specific growth rate drops to zero because nutrient depletion equals cell division rate
B.Cells divide at their maximum specific growth rate (μmax) with a constant population doubling time
C.Intracellular enzymes are synthesized to adapt to new culture media without an increase in cell count
D.Toxic metabolite accumulation triggers rapid autolysis and a steep decline in viable cell density
Explanation: The exponential or log phase (대수증식기) is defined by balanced, exponential cell division where the specific growth rate reaches its maximum (μmax) and the population doubles at a constant rate. During this phase, nutrients are abundant, metabolic activity is uniform, and cells are in their healthiest physiological state, making it the optimal window for subculturing or inoculating bioreactors.
3Why is a 70% (v/v) aqueous isopropanol (IPA) or ethanol solution significantly more effective for routine surface disinfection (표면 소독) in bioprocess cleanrooms than 100% absolute alcohol?
A.100% alcohol evaporates too slowly, leaving sticky residues on stainless steel surfaces
B.100% alcohol is not flammable, whereas 70% alcohol produces disinfecting vapor pressure
C.Water in the 70% solution slows evaporation and facilitates alcohol penetration through cell walls before coagulating proteins
D.100% alcohol rapidly oxidizes bacterial spores, whereas 70% alcohol dissolves viral lipid envelopes exclusively
Explanation: 70% aqueous alcohol (IPA or ethanol) contains water, which prevents immediate surface protein coagulation and slows down evaporation. This allows the alcohol molecules to penetrate through the cell wall and membrane into the cytoplasm, effectively coagulating internal structural and enzymatic proteins. In contrast, 100% absolute alcohol instantly coagulates outer cell wall proteins, forming a protective barrier that shields the inner cytoplasm and leaves microorganisms viable.
4Which Biosafety Level (BSL, 생물안전등급) is appropriate for working with well-characterized biological agents that do not cause disease in healthy adult humans, such as standard laboratory strains of Escherichia coli K-12 or Saccharomyces cerevisiae?
A.BSL-4
B.BSL-3
C.BSL-2
D.BSL-1
Explanation: BSL-1 (생물안전 1등급) applies to laboratory work with well-characterized agents that do not consistently cause disease in immunocompetent adult humans. Examples include non-pathogenic laboratory strains such as E. coli K-12, Saccharomyces cerevisiae (baker's yeast), and Bacillus subtilis. Standard microbiological practices, benchtop work without special containment, and basic personal protective equipment (PPE) are sufficient for BSL-1.
5When comparing yeast expression systems such as Pichia pastoris (피키아 파스토리스) with mammalian CHO cell systems for biopharmaceutical manufacturing, what is a primary operational advantage of Pichia pastoris?
A.Production of identical human-type complex branching sialylated glycans without hypermannosylation
B.Rapid growth to very high cell densities (고농도 배양) in simple, low-cost defined media with high volumetric productivity
C.Total lack of a cell wall, which simplifies cell lysis and mechanical downstream recovery
D.Inability to secrete recombinant proteins, keeping all product trapped in inclusion bodies
Explanation: Pichia pastoris is a methylotrophic yeast that can grow to extremely high cell densities (>100 g/L dry cell weight) in inexpensive, chemically defined mineral salt media. It can secrete large amounts of recombinant proteins into the extracellular broth, greatly simplifying initial clarification. However, wild-type yeast cells produce high-mannose glycosylation rather than complex human-type branching glycans, which is why mammalian CHO cells remain preferred for therapeutic antibodies requiring specific Fc-effector functions.
6What fundamental functional difference distinguishes a Class II Biological Safety Cabinet (BSC, 생물안전작업대) from a standard horizontal laminar flow Clean Bench (크린벤치)?
A.A Class II BSC protects the operator, environment, and product using an air curtain and HEPA-filtered exhaust, whereas a Clean Bench protects only the product and blows air directly toward the operator
B.A Clean Bench provides negative pressure containment to protect the user, whereas a Class II BSC blows unfiltered room air across the work surface
C.A Class II BSC recirculates 100% of air without HEPA filtration, whereas a Clean Bench utilizes 20 nm ultrafiltration membranes
D.A Clean Bench is certified for handling BSL-3 pathogens, whereas a Class II BSC is restricted strictly to non-hazardous media preparation
Explanation: A standard Clean Bench draws room air through a pre-filter and HEPA filter, then discharges the clean laminar airflow horizontally or vertically across the work surface straight toward the operator, protecting only the product while exposing the worker to any aerosols. In contrast, a Class II BSC draws room air through a front intake grille to create an air curtain (protecting the operator), circulates HEPA-filtered laminar downflow over the product (protecting the product), and filters all exhaust air through a HEPA filter before discharging it into the room or facility ducting (protecting the environment).
7In pharmaceutical autoclave validation (고압증기멸균 밸리데이션), which biological indicator microorganism is standardly utilized to verify the lethality of moist heat steam sterilization at 121°C?
A.Bacillus subtilis endospores
B.Escherichia coli vegetative cells
C.Pseudomonas aeruginosa biofilms
D.Geobacillus stearothermophilus endospores
Explanation: Geobacillus stearothermophilus (formerly Bacillus stearothermophilus) produces extremely thermophilic endospores with high resistance to moist heat, characterized by a D-value (decimal reduction time at 121°C) typically between 1.5 and 3.0 minutes. Surviving or non-surviving spore ampoules incubated at 55-60°C provide the regulatory standard for biological validation and routine qualification of moist heat autoclave cycles (typically 121°C for 15-30 minutes).
8What is the rated minimum particle filtration efficiency and reference particle size of a standard High-Efficiency Particulate Air (HEPA, 헤파필터) filter used in bioprocess biosafety cabinets and cleanrooms?
A.95.00% of particles ≥ 5.0 μm
B.99.00% of particles ≥ 1.0 μm
C.99.97% of particles ≥ 0.3 μm
D.99.999% of particles ≥ 0.01 μm
Explanation: By international regulatory definition (ISO 29463 / EN 1822 / US MIL-STD-282), a standard H14/Type A HEPA filter must capture at least 99.97% of airborne particles having a diameter of 0.3 μm. The 0.3 μm dimension represents the Most Penetrating Particle Size (MPPS), where impaction, interception, and diffusion mechanisms are least effective; particles both larger and smaller than 0.3 μm are trapped with even higher efficiency.
9In recombinant protein production using bacterial hosts such as Escherichia coli, what structural feature and potential downstream complication is associated with overexpressing hydrophobic foreign proteins at high induction levels?
A.Secretion of protein through the outer membrane into the bulk medium as soluble, properly folded tetramers
B.Formation of insoluble, dense protein aggregates known as inclusion bodies (봉입체) requiring solubilization and refolding
C.Spontaneous cleavage of all disulfide bonds into free cysteine thiols by extracellular proteases
D.Formation of thick peptidoglycan capsules that irreversibly fuse host ribosomal RNA to plasmid DNA
Explanation: High-level expression of recombinant proteins in E. coli often overwhelms the native bacterial chaperone folding machinery, causing partially folded or misfolded polypeptides to aggregate into dense, insoluble intracellular granules called inclusion bodies (봉입체). While inclusion bodies protect the target protein from intracellular proteolysis, they require downstream harvest via cell disruption, centrifugation, solubilization using strong chaotropic agents (such as 6 M guanidine-HCl or 8 M urea), and subsequent in vitro refolding.
10Where should contaminated sharp medical and laboratory waste, such as used hypodermic needles, syringe tips, and broken culture capillary pipettes, be disposed of in a bioprocess facility?
A.In a rigid, puncture-resistant, leak-proof sharps container (손상성폐기물 전용용기) bearing a biohazard symbol
B.In a standard black general municipal waste bin after wrapping loosely in paper towels
C.In a thin yellow plastic autoclave bag hung on an open bench wire stand
D.In a solvent recovery drum designated for flammable liquid extraction wastes
Explanation: Contaminated sharp objects (needles, scalpels, broken glass, capillary tubes) pose severe puncture and bloodborne pathogen transmission risks. Regulations strictly mandate that all sharps be deposited immediately into dedicated puncture-resistant, rigid plastic sharps containers (손상성폐기물 전용용기) labeled with the universal biohazard symbol, and never overfilled beyond the indicated fill line (typically 3/4 full).

About the Craftsman Bio Process Exam

Craftsman Bio Process (바이오공정기능사) is a South Korean national technical qualification enacted in 2026 under the National Technical Qualifications Act Enforcement Rules, administered by HRD Korea via Q-Net under the Ministry of Trade, Industry and Energy. The written examination tests core practical knowledge across biopharmaceutical manufacturing: biosafety standards, media formulation and sterilization (CIP/SIP), cell banking and seed culture, bioreactor control parameters (pH, dissolved oxygen, temperature, agitation), downstream isolation and purification (centrifugation, filtration, chromatography), and GMP quality control (water for injection testing, bioburden, endotoxin testing, and cleanroom monitoring). OpenExamPrep provides an independent English-language MCQ study adaptation for written preparation, not an official translation or laboratory practical simulation.

Exam sponsor: HRD Korea (Q-Net) / Ministry of Trade, Industry and Energy (MOTIE). The requirements and fees below concern the certification or admission exam, separate from our free practice resources.

Assessment

Written examination of 60 four-option CBT questions in 60 minutes on the single official subject 바이오 생산 및 품질관리 기초, whose published scope runs from bioscience fundamentals and production cell preparation through cleaning and sterilisation, culture fundamentals, separation and purification preparation, and quality testing; followed by a practical examination in 바이오 생산 및 품질관리 실무.

Time Limit

60 minutes written; practical duration scheduled per session

Passing Score

Written: 60/100 (36/60); practical: 60/100

Exam / Certification Fees

KRW 14,500 written (Q-Net, 2026)

Exam sponsor website

Fees, eligibility, and exam policies can change. Confirm them with the exam sponsor before applying or paying.

Official sources

Our practice resources: topics covered

We aim to reflect publicly available exam outlines and topic information in our study resources. Coverage, format, and difficulty may differ from the actual exam, and we cannot guarantee that every detail is accurate or current. Confirm exam requirements, fees, and policies with the official exam sponsor.

Main item

Bioscience Fundamentals (바이오 기초지식)

Prokaryote versus eukaryote hosts, E. coli inclusion bodies, CHO and Pichia expression systems, lag, log, stationary and death phases, Gram staining, and biosafety levels 1 to 4.

Main item

Production Cell Preparation (생산세포 준비)

Two-tier master and working cell banks, DMSO as cryoprotectant, controlled cooling at about -1 °C/min, storage below -130 °C, rapid thawing and prompt DMSO removal.

Main item

Cleaning and Sterilisation (세척·멸균)

Alkaline and acid CIP steps with conductivity and pH rinse verification, SIP at 121-123 °C with steam traps and vacuum break, autoclave air removal and Geobacillus stearothermophilus indicators, 0.22 μm filtration, bubble point and diffusion integrity testing.

Main item

Culture Fundamentals (배양기초)

Chemically defined serum-free media, glutamine stability, bicarbonate buffering, osmolarity, low-shear impellers, baffles, spargers, single-use and rocking bioreactors, batch, fed-batch and perfusion, temperature shift, DO cascade control, kLa, foam and antifoam, and dissolved CO2 accumulation.

Main item

Separation and Purification Preparation (분리·정제 준비)

Low-shear disc-stack centrifugation, charged depth filtration, tangential flow filtration and transmembrane pressure, Protein A capture and low-pH elution, anion exchange flow-through, cation exchange, hydrophobic interaction and size exclusion chromatography.

Main item

Quality Testing (품질시험)

Low-pH viral inactivation and 15-20 nm nanofiltration as orthogonal clearance, UF/DF formulation and polysorbate, LAL endotoxin testing, bioburden, WFI conductivity and TOC limits, Grade A to D cleanrooms, settle and contact plates, and SE-HPLC release testing.

Preparing for the Craftsman Bio Process Exam

What You Need to Know

  • Passing score: Written: 60/100 (36/60); practical: 60/100
  • Assessment: Written examination of 60 four-option CBT questions in 60 minutes on the single official subject 바이오 생산 및 품질관리 기초, whose published scope runs from bioscience fundamentals and production cell preparation through cleaning and sterilisation, culture fundamentals, separation and purification preparation, and quality testing; followed by a practical examination in 바이오 생산 및 품질관리 실무.
  • Time limit: 60 minutes written; practical duration scheduled per session
  • Exam / certification fees: KRW 14,500 written (Q-Net, 2026) Official sources

Using Our Practice Resources

  • Work through all 100 available questions
  • Review every answer and explanation
  • Track weak areas and revisit them
  • Use our AI tutor for tough concepts

Craftsman Bio Process: Suggested Study Strategy

1Anchor your study to the six published scope headings: 바이오 기초지식, 생산세포 준비, 세척·멸균, 배양기초, 분리·정제 준비 and 품질시험.
2Learn the growth curve as four phases with a reason for each transition, and be able to say what limits growth in each one.
3Fix the sterilisation numbers: 121 °C for 20-30 minutes with saturated steam, 0.22 μm for sterilising-grade liquid filtration, 15-20 nm for parvovirus-retentive nanofiltration, and 99.97 % at 0.3 μm for a HEPA filter.
4Understand why air removal matters in an autoclave: residual air lowers the steam partial pressure, so the indicated pressure no longer corresponds to 121 °C.
5Learn the cryopreservation chain end to end - DMSO at 5-10 %, cooling at about -1 °C/min, storage below -130 °C, rapid thawing at 37 °C, then immediate dilution to remove DMSO.
6Follow one antibody through the whole downstream train: Protein A capture, low-pH hold, anion exchange flow-through, nanofiltration, then UF/DF into the final formulation.
7Keep the Korean terms alongside the English concepts, because the official Q-Net CBT is delivered in Korean.
8Download the three sample written questions Q-Net published for this new qualification; they are the only official indication of question style so far.

Frequently Asked Questions

What is Craftsman Bio Process (바이오공정기능사)?

It is a South Korean national technical qualification enacted in 2026 under the Ministry of Trade, Industry and Energy (MOTIE) and administered by HRD Korea via Q-Net. It certifies entry-level technical competence in biopharmaceutical production, cell culturing, downstream purification, and GMP quality control.

Who is eligible to register for the exam?

There are no prerequisites or eligibility requirements. Under the National Technical Qualifications Act, Craftsman (기능사) grade examinations are open to everyone regardless of academic degree, major, age, or prior work experience.

What is the examination structure and passing grade?

The written exam is a 60-minute CBT with 60 four-option multiple-choice questions on the single official subject 바이오 생산 및 품질관리 기초. The passing score is 60 out of 100 (at least 36 correct answers). Candidates who pass sit a practical examination in 바이오 생산 및 품질관리 실무, also marked out of 100 with a 60-point pass mark; because 2026 was the first year of the qualification, the practical format should be confirmed on Q-Net for the sitting concerned.

What are the fees and written pass exemption rules?

The written CBT fee is KRW 14,500 on Q-Net. Under National Technical Qualifications Act Enforcement Decree Article 21, passing the written exam exempts the candidate from retaking the written test for two consecutive years.

Is this practice bank an official test simulator?

No. This practice bank is an independent English-language study adaptation developed by OpenExamPrep to help learners and technical professionals master bioprocess concepts. It is not an official translation, does not duplicate confidential Q-Net questions, and does not simulate hands-on wet-lab procedures.