100+ Free ABC-BIO Practice Questions
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Key Facts: ABC-BIO Exam
50 + 10
Scored + Pilot Items
ABC Biological Screening page
1 hr 30 min
Time Limit
ABC Biological Screening page
$250
Exam Fee
ABC Application Process
$75
Application Fee
ABC Application Process
FKE
Prerequisite Exam
ABC Certification Scheme
5 years
Recertification Cycle
ABC Certification Scheme
90 days
Application Lead Time
ABC Application Process
In person
Delivery Mode
ABC Certification page
ABC-BIO is the American Board of Criminalistics Biological Evidence Screening certification for active forensic-lab screeners. The closed-book in-person exam runs up to 1 hour 30 minutes and contains 50 scored items plus 10 unscored pilot items (60 total). The application fee is $75 and the exam fee is $250; applications must be submitted at least 90 days before the sitting and remain valid for 24 months. ABC does not publish the numeric cut score. Recertification runs on a 5-year cycle with annual maintenance fees and signed Rules of Professional Conduct. Candidates must hold (or be approved for) the ABC Foundational Knowledge Exam, work a screening bench, and submit two professional references.
Sample ABC-BIO Practice Questions
Try these sample questions to test your ABC-BIO exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.
1A bench analyst dabs a stain with filter paper, adds phenolphthalin reagent, then hydrogen peroxide, and the paper turns bright pink within seconds. What does this result indicate?
2Why must hydrogen peroxide be added AFTER the phenolphthalin reagent during a Kastle-Meyer test rather than simultaneously?
3An analyst sprays luminol on a cleaned floor and photographs a faint blue-white chemiluminescence. Which statement most accurately describes the limitation of this result?
4Which presumptive blood reagent is marketed as more sensitive than luminol while producing less interference from bleach and copper backgrounds?
5A Takayama test on a suspected bloodstain produces salmon-pink rhombic crystals under the microscope. What does this confirm?
6Teichmann crystal testing relies on the formation of which characteristic crystal?
7Which immunochromatographic test confirms that a presumptive bloodstain is of HUMAN (or higher-primate) origin by detecting human hemoglobin?
8Which substrate is MOST likely to cause a false positive on the Kastle-Meyer presumptive blood test?
9A casework cutting is placed in a tube with sodium acetate buffer and brentamine-coupled napthyl phosphate; a purple color develops within 30 seconds. What is the BEST interpretation?
10Acid phosphatase reaction times longer than 1-2 minutes are interpreted cautiously because AP activity above background can also originate from which source?
About the ABC-BIO Exam
ABC-BIO is the American Board of Criminalistics specialty certification for forensic biologists and screeners who locate, identify, and prepare biological evidence for downstream DNA analysis. The closed-book in-person exam contains 50 scored multiple-choice questions plus 10 unscored pilot items and runs up to 1 hour and 30 minutes. Candidates must hold or be approved for the ABC Foundational Knowledge Exam (FKE) and actively work a screening bench performing presumptive and confirmatory body-fluid testing.
Questions
60 scored questions
Time Limit
Up to 1 hour, 30 minutes
Passing Score
Not published (scaled cut score set during exam development)
Exam Fee
$75 application fee + $250 examination fee (American Board of Criminalistics)
ABC-BIO Exam Content Outline
Blood Identification
Kastle-Meyer/phenolphthalein, leucomalachite green, Bluestar/luminol peroxidase chemistry, Takayama and Teichmann crystals, ABA card/HemoTrace for human hemoglobin.
Semen Identification
Acid phosphatase color-change kinetics, Christmas tree (nuclear fast red + picroindigocarmine) sperm visualization, RSID-Semen semenogelin, p30 PSA.
Saliva, Urine, Feces, Menstrual Blood, Vaginal
Phadebas alpha-amylase, RSID-Saliva, Jaffe creatinine, urobilinogen, D-dimer for menstrual blood, glycogen-rich vaginal epithelial cells.
Search Techniques and ALS
Alternate light source at 450 nm with orange filter for semen fluorescence, substrate selection, cutting/swabbing techniques, bindle packaging, drying.
Extraction and Sample Preparation
Differential extraction of sperm vs epithelial fractions for sexual-assault evidence, hair root vs shed hair HCRT, microscope morphology.
Quality Assurance, Safety, and Reporting
Positive/negative controls, reagent verification, ISO/IEC 17025 + ANAB accreditation, OSAC Biology, chain of custody, 29 CFR 1910.1030 PPE, court testimony limits.
How to Pass the ABC-BIO Exam
What You Need to Know
- Passing score: Not published (scaled cut score set during exam development)
- Exam length: 60 questions
- Time limit: Up to 1 hour, 30 minutes
- Exam fee: $75 application fee + $250 examination fee
Keys to Passing
- Complete 500+ practice questions
- Score 80%+ consistently before scheduling
- Focus on highest-weighted sections
- Use our AI tutor for tough concepts
ABC-BIO Study Tips from Top Performers
Frequently Asked Questions
What is the ABC Biological Evidence Screening certification?
ABC-BIO is the American Board of Criminalistics specialty credential for forensic biologists who screen evidence and prepare samples for DNA analysis. It validates competency in body-fluid identification, ALS searches, and pre-amplification sample handling, but it does not by itself certify a DNA analyst for amplification or interpretation.
How many questions are on the ABC-BIO exam and how long is it?
The exam contains 50 scored multiple-choice questions plus 10 unscored pilot questions, for 60 total items. Candidates have up to 1 hour and 30 minutes. ABC delivers the exam in person only at specified testing locations; no remote proctoring is available.
What is the passing score for ABC-BIO?
ABC does not publish the numeric cut score. The passing score is determined during exam development and pilot testing and is kept confidential. Candidates receive a pass/fail result within about 30 days of the exam date.
What does ABC-BIO cost?
The application fee is $75 and the examination fee is $250 per sitting. Annual maintenance fees apply to keep certification active after passing. Applications must be submitted at least 90 days before the desired exam date and remain valid for 24 months after approval.
Do I need to pass the FKE before taking ABC-BIO?
Yes. ABC-BIO is a specialty exam in the ABC certification scheme; candidates must hold or be approved to sit for the Foundational Knowledge Exam (FKE/GKE) in addition to working at a forensic-science service provider performing biological screening.
What experience do I need to apply?
You must be actively employed at a forensic-science service provider performing biological evidence screening work, including presumptive and confirmatory testing for blood, semen, and miscellaneous body fluids. Two professional references and a signed Rules of Professional Conduct acknowledgment are required with the application.
How often must ABC-BIO be recertified?
ABC certifications run on a 5-year recertification cycle. Certificants must pay annual maintenance fees, submit signed Rules of Professional Conduct each year, and complete continuing-education and professional-development requirements before the recertification deadline.
Can ABC-BIO be taken online or remotely?
No. ABC examinations are only offered in person at specified testing locations. Remote proctoring is not available, so candidates must arrange travel to an approved site.
What presumptive and confirmatory tests appear on ABC-BIO?
Expect Kastle-Meyer/phenolphthalein, leucomalachite green, Bluestar/luminol, Takayama, Teichmann, and ABA card/HemoTrace for blood; acid phosphatase, Christmas tree stain, RSID-Semen, and p30 for semen; Phadebas alpha-amylase and RSID-Saliva for saliva; and Jaffe creatinine, urobilinogen, D-dimer, and glycogenated vaginal cells for the remaining fluids.
Why is ALS at 450 nm with an orange filter important?
Semen fluoresces strongly under blue light near 450 nm when viewed through an orange (approximately 555 nm long-pass) barrier filter. Screeners use this wavelength to triage large items and locate candidate semen stains before applying acid phosphatase or RSID-Semen confirmatory tests.