SCYM Cheat Sheet 2026

The 30 highest-yield SCYM facts, distilled from real exam questions. Print it, save it as a PDF, or study it here — free, no sign-up.

1. What is the function of optical filters? → Isolate light wavelengths
2. What type of scale is often used for displaying flow data? → Logarithmic
3. What is the most important professional competency for SCYM certification in flow cytometry principles? → Deep knowledge combined with practical application skills
4. What role does collaboration play in immunophenotyping for SCYM professionals? → It enhances outcomes through diverse perspectives and shared expertise
5. Why must cells be filtered before analysis? → Remove clumps and debris
6. What is the purpose of using a 'fluorescence minus one' (FMO) control? → To determine the boundary of positivity in the presence of spectral spillover
7. Which software is commonly used for cytometry analysis? → FlowJo
8. What does mean fluorescence intensity (MFI) indicate? → Expression level
9. In flow cytometry, what does the term 'compensation' correct for? → Spectral spillover of fluorochromes into adjacent channels
10. Which scenario represents a violation of the Specialist in Cytometry code of professional conduct? → Misrepresenting qualifications or certification status
11. Which ethical principle requires SCYM professionals to act in the patient's best interest? → Beneficence
12. When conducting a risk assessment for SCYM operations, which factor should receive the HIGHEST priority? → Probability and severity of potential harm
13. Which professional attribute is most valued in data analysis within the SCYM field? → Accountability and commitment to standards
14. A sub-G1 peak in a DNA histogram is most commonly associated with which cellular process? → Apoptosis with DNA fragmentation
15. What is intra-laboratory quality control? → Control within the same lab
16. Why are antibodies commonly used in staining? → Target specific proteins
17. What role does collaboration play in fluorochrome selection for SCYM professionals? → It enhances outcomes through diverse perspectives and shared expertise
18. Which fluorochrome is most susceptible to photobleaching during extended acquisition times? → FITC
19. What is the most important professional competency for SCYM certification in data analysis? → Deep knowledge combined with practical application skills
20. Which scenario represents a violation of the Specialist in Cytometry code of professional conduct? → Misrepresenting qualifications or certification status
21. What is gating in flow cytometry analysis? → Isolating data subsets
22. How does the SCYM body of knowledge relate to daily professional practice? → It provides the foundational framework that guides decision-making and standard practices
23. What is an inter-laboratory comparison? → Testing same samples in different labs
24. In a panel using a UV laser (355 nm), which fluorochrome would be an appropriate choice for UV excitation? → BUV395
25. Which antibody marker best helps distinguish tetraploid G1 cells (4N) from true G2/M cells (also 4N) in DNA content analysis? → MPM-2 anti-phosphoprotein antibody
26. What is the function of staining buffers? → Prevent non-specific binding
27. What is the PRIMARY purpose of obtaining SCYM certification in Specialist in Cytometry? → To demonstrate verified competency and adherence to professional standards
28. Which property of a fluorochrome directly determines the amount of spectral spillover into adjacent channels? → Emission spectrum width and tail
29. What is the primary function of the sheath fluid in a flow cytometer? → To hydrodynamically focus cells into a single-file stream
30. What is the ideal cell concentration for flow analysis? → 50 million cells/mL