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Feb 20, 2024

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CORRECT ANSWER What part of the body does livor mortis occur? A. Hands B. Liver C. Lowest extremities D. Heart Which of the following tests is typically used if blood is suspected but not visible to the naked eye, and also reacts with copper and iron compounds, cobalt ions, potassium permanganate, bleach and plant peroxidases? A. Tetramethylbenzidine B. Phenolpthalein C. Benzidine D. Luminol What is the most abundant protein in blood serum? A, Hemoglobin B. Albumin C. Globulin D. Fibrin Semen fluoresces due to the presence of ---------- -.

A. Taq polymerase B. Pseudomonas bacteria C. Flavins A. B and C The best screening test for saliva is --------. A. Acid phosphatase mapping B. P30 mapping C. Amylase mapping D. Glucose mapping Which phase of hair growth is the shedding phase? A. Anagen B. Catagen C. Telogen In electrophoresis, positively charged molecules will migrate to the positively charged anode True False Which of these would not be correct? A. Red cell Ag = A + Serum Ab = B -> ABO type is B B. Red cell Ag = B + Serum Ab = A --> ABO type is B

C. Red cell Ag = A and B + Serum Ab = None --> ABO type is AB D. Red cell Ag = None + Serum Ab = A and B --> ABO type is O Which of the following stains are used to visualize protein bands that have been separated by electrophoresis? A. Coomassie blue B. Ponceau red C. Amido black D. All of the above True or False - PGM can be found in blood, vaginal secretions and semen? True False What component of blood becomes activated when the circulatory system is breached and loss of blood occurs? A. Hemoglobin B. Platelets C. Glucose and hormones D. Fibrin Which one of the following methods is not a DNA quantitation technique? A. Slot blot

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B. Real-time PCR C. Picogreen Assay D. Western blot In the laboratory a drug sample that is a false negative is associated with: A. The failure of the analytical test B. Can result in critical data being lost C. Is considered a less serious error than a false positive D. All of the above Precipitation tests are not an example of an indirect test when referring to microcrystal tests. True False What color is produced by Marquis' reagent in the presence of Opium Alkaloids? A. Orange B. Green C. Purple D. Brown Which of the following compounds is not considered to be acidic? A. Codeine B. Aspirin

C. Ibuprofen D. Penicillin Which of the following is a disadvantage of liquid-liquid extraction? A. Immiscible solvents are not required B. It does not take a lot of time to complete C. Less selective than other extraction methods D. Does not require large volumes of solvents Which of the following statements is CORRECT regarding TLC? A. Mobile phase composition is not dependent on the class/classes of drugs to be separated and the type of stationary phase chosen B. When the mobile phase is more polar than the stationary phase this is referred to as a reversed- phase system. C. Silica gel as a stationary phase is composed of uniformly distributed particles and is weakly basic in nature D. None of the above The following drug is NOT a known cross-reactor on Cannabinoids immunoassays: A. naproxen B. Ephedrine C. Ketoprofen D. Tolmetin

Which of the following is NOT a disadvantage of ELISA: A. Cost per sample high B. sodium azide will block action of horseradish peroxidase C. Cumbersome set-up D. none of the above In GC/MS, the most abundant ion is usually assigned a relative abundance of 100%; it is known as the molecular ion. True False Which of the following is NOT a mass spectrometry ionization method? A. CI B. CEDIA C. MALDI D. EI A signal-to-noise ratio greater than _________ is generally considered acceptable for estimating the limit of detection limit. A. 1:1 B. 3:1 C. 2:1

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D. Both B and C Which of the following cutting agents are commonly used to cut cocaine? A. Sodium bicarbonate B. Lidocaine C. Caffeine D. All of the above Who is credited with being the first to use latent prints in a criminal case, as well as being the first to use systematic crime scene photography for recording a scene? A. Ouchterlony B. Holmes C. Bertillon D. Locard When securing a crime scene, boundaries typically start at the focal point of the scene and extend outward to include: A. Where the crime occurred B. Potential points of entry and exit of suspects and witnesses C. Places where the victim or evidence may have been moved D. All of the above

Which of the following is NOT one of the universally accepted searching methods in regards to crime scene investigation? A. Strip method B. Swirl method C. Wheel method D. Grid method Rigor mortis remains for _______ then disappears again A. 12 - 18 hours B. 5 - 6 days C. 2 - 3 days D. 6 - 12 hours Which of the following does NOT need to be recorded via photography at a crime scene? A. The location of the CSI team at the scene B. The overview, a general shot with features to identify the location C. The location of any significant evidence, usually a mid-range shot D. The evidence detail, perhaps with close-up procedures Luminol is used to search for bloodstains and is not considered a presumptive test. True False

Which of the following is true in regards to searching for the origin of a fire? A. Fires burn downwards and inwards B. Combustible materials decrease the intensity and extent of the fire C. Fire requires fuel and oxygen to continue burning D. Air currents, walls and stairways have no influence on a fire's spread For the physical development of fingerprints, what is the name of the where the chemical reacts with amino acids, fatty acids, and proteins in the latent print and the moisture in the air, then producing a visible, sticky, white material along the ridges of the fingerprint? A. Ninhydrin B. Cyanoacrylate Fuming C. Diazafluoren (DFO) D. Small Particle Reagent (SPR) In regards to paint analysis, which of the following methods is usually not suitable for the identification of organic pigments? A. Scanning Electron Microscopy B. X-ray fluorescence spectrometry C. X-ray diffraction D. Scanning fluorescence diffraction The DNA in human body fluid cells will be degraded rapidly on items (rich in microorganisms) such as:

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A. Foliage B. Soil C. Carpeting D. All of the above Physical struggles are not likely to result in the transfer of some trace DNA evidence from subject to victim. True False Which of the following is NOT an example of a smokeless powder (propellant)? A. Guncotton, B. Sodium nitrate C. Ballistite D. Cordite N Prior to the advent of DNA analysis, what did forensic serologists examine to help determine the origin of biological stains and fluids? A. mRNA B. Saliva C. Heterozygous enzymes D. Polymorphic enzymes

Automobile paint typically has a minimum of ______ layers A. 2 B. 3 C. 4 D. 5 In an SOP there should be a section for referenced documents, such as equipment manuals and other SOPs, as these documents are already present in the lab. True False Which of the following individuals is responsible for the coaching and mentoring of the staff as well as the technical performance of the analyses, the interpretation, analysis, documentation and reporting of results? A. The quality manager B. The laboratory director C. The technical manger D. The support system manager It is acceptable to have pre and post amplified DNA in the same work area True False

Which type of uncertainty can be gathered from historical laboratory data, that is, a large number of repeated measurements taken of the analyte over a period of time? A. Type A B. Type B Which of the following terms refers to when an instrument is tested and shown to meet previously set (frequently by the vendor) specifications? A. Performance Qualification B. Installation Qualification C. Operational Qualification D. Design Qualification Once a sample is logged into a forensic laboratory, which of the following is true? A. The identification number for the individual sample can be placed on the lid B. The sample can be identified as occupying a certain location in a test tube rack. C. There is a record that states when the sample was received and logged in D. It can be stored next to reference samples in an unsecured location Preventative maintenance usually involves simple procedures intended to protect the equipment and/or personnel. True False

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Experimental design in study protocols is concerned with obtaining data in a statistically relevant manner, which means the following items should be done: A. The number of samples or subjects must be sufficiently large to provide a representative set of data. B. The variables must be controlled. C. A measurement (weight, quantity, etc) is preferred over an observation (e.g., the patient was slightly, moderately, or very nauseated). D. All of the above This measurement of the dispersion of values is the square of the standard deviation and is considered the best measure of precision. A. Range B. Variance C. Standard Deviation D. Coefficient of variation One is not able to show that correct analytic procedures for the sample were followed by using archived records. True False Which of the following is NOT true about audits? A. They ensure that the laboratory is maintaining accreditation standards.

B. Deficiencies must be corrected in order to maintain accreditation C. The laboratory does not need to suspend activities when there are severe deficiencies that greatly affect the reliability of the testing at the laboratory D. It is a detailed inspection of all aspects of the laboratory program Which of the following might occur when there is an audit? A. The auditor may track a random specimen from time of collection to final results and report. B. The auditor may inspect many different types of records C. The auditor may want to see how results are calculated D. All of the above