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ABC-BIO Practice Questions - ABC Biological Evidence Screening Certification (ABC-BIO) Exam

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About this Exam

Prepare with the ABC-BIO Practice Questions - ABC Biological Evidence Screening Certification (ABC-BIO) Exam practice quiz. This question bank includes 100 questions covering presumptive, reagent, blood, analyst, and evidence. Use it to review important concepts, identify knowledge gaps, and build confidence for the related exam, course, or assessment.

Sample Questions

Question 1
A 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?
Confirmed presence of human blood
Presumptive positive for blood (peroxidase activity)
Confirmed presence of menstrual blood
Eliminates blood from further consideration
Question 2
Why must hydrogen peroxide be added AFTER the phenolphthalin reagent during a Kastle-Meyer test rather than simultaneously?
To prevent false-positive color from atmospheric oxidation of reduced phenolphthalin
To dissolve the dried blood
To buffer the reaction to neutral pH
To denature contaminating proteins
Question 3
An analyst sprays luminol on a cleaned floor and photographs a faint blue-white chemiluminescence. Which statement most accurately describes the limitation of this result?
It confirms human blood at the location
It is species-specific to mammals
It is a presumptive reaction prone to false positives from bleach, copper, and some plant peroxidases
It precludes any further DNA recovery
Question 4
Which presumptive blood reagent is marketed as more sensitive than luminol while producing less interference from bleach and copper backgrounds?
Bluestar Forensic
Leucomalachite green
Hemastix
Tetramethylbenzidine (TMB)
Question 5
A Takayama test on a suspected bloodstain produces salmon-pink rhombic crystals under the microscope. What does this confirm?
Human blood specifically
Hemoglobin (hemochromogen crystals)
Menstrual rather than peripheral blood
Presence of intact red blood cells

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Additional Information

ABC-BIO Practice Questions - ABC Biological Evidence Screening Certification (ABC-BIO) Exam

This practice set contains 100 questions from the matching question bank and focuses on presumptive, reagent, blood, analyst, and evidence. Work through each question carefully, review the provided solutions, and revisit topics that need more study before your next attempt.

This is an independent study resource intended for practice and review; it is not an official examination or an endorsement by any organization named in the title.

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Frequently Asked Questions

This quiz contains a total of 100 practice questions carefully selected to test your knowledge on this subject.
Yes, you will have exactly 0 minutes to complete the exam. A countdown timer will be visible once you start.
Yes, you can retake this practice test as many times as you need. The questions and options may be randomized on subsequent attempts to ensure comprehensive learning.

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