ASCP ASCP Certifications ASCP-MLT Questions & Answers

• Question 51:

  The Fc portion of immunoglobulin can activate the classical complement pathway, where the heavy chains, light chains, hinge regions and Fab portions cannot.

  Which part of the immunoglobulin molecule is responsible for activating complement?

  A. Fc

  B. Fab

  C. heavy chains

  D. light chains

  E. Hinge regions

  Correct Answer: A

• Question 52:

  If a drug is given at intervals that are the same as its half-life, it will take about 5 half-lives to reach steady state.

  If a drug is given at intervals that are the same as its half-life, approximately how long will it take the drug to reach steady state?

  A. It will be at steady state from the first dose.

  B. It will take about two half-lives to reach steady state.

  C. It will take about 5 half-lives to reach steady state.

  D. It will never reach a steady state.

  Correct Answer: C

• Question 53:

  Gram positive organisms resist decolorization by ethyl alcohol. The large crystal violet- iodine complex is not able to penetrate the peptidoglycan layer, and is trapped within the cell in gram-positive organisms. Conversely, the outer membrane of gram-negative organisms is degraded and the thinner peptidoglycan layer of gram-negative cells is unable to retain the crystal violet-iodine complex and the color is lost.

  What is the purpose of using ethyl alcohol or acetone in the gram stain procedure:

  A. Fix all gram positive organisms

  B. Decolorize all gram positive organisms

  C. Decolorize all gram negative organisms

  D. Fix all gram negative organisms

  Correct Answer: C

• Question 54:

  CAMP is the correct answer because the case is typical of Streptococcus agalactiae(Group B strep). The main presumptive identification test is CAMP. Bile solubility is positive for Streptococcus pneumonia. Coagulase would be positive for Staphylococcus aureus. PYR is positive for Streptococcus pyogenes (Group A strep) which is ruled out by the resistance to bacitracin.

  Microbiology

  Spinal fluid cultures on a 3-day-old infant revealed beta-hemolytic, Gram-positive cocci occurring in pairs and chains. The organism was catalase-negative and bile esculin- negative. Resistance to 0.04 U disk of bacitracin was noted. The other test necessary to identify this organism is a positive test by:

  A. Bile solubility

  B. CAMP

  C. Coagulase

  D. PYR

  Correct Answer: B

• Question 55:

  A. releasing heparin

  B. binding fibrinogen

  C. binding calcium

  D. acting as an antithrombin agent

  Correct Answer: C

• Question 56:

  The DAT is most likely to be negative in ABO HDFN. It's possible that the washing done as part of the DAT may break the bonds between anti-A (or anti-B) and the newborn's poorly developed A (or B) antigens.

  For which of the following antibodies is the DAT most likely to be negative when testing a newborn for possible HDFN?

  A. anti-A

  B. anti-c

  C. anti-D

  D. anti-K

  E. anti-Fya

  Correct Answer: A

• Question 57:

  The part of the microscope that control the amount of light entering the specimen much like the iris of your eye controls light is called the iris _______________.

  A. fine adjustment

  B. objective

  C. condenser

  D. diaphragm

  Correct Answer: D

• Question 58:

  Transfusion of red cells of any ABO type other than O to a group O patient is of course likely to cause a hemolytic transfusion reaction.

  Which of the following types of packed RBCs could be transfused to a group O patient:

  A. Group A

  B. Group B

  C. Group AB

  D. None of the above

  Correct Answer: D

• Question 59:

  In DNA complementary base pairing, guanine and cytosine pair and adenine and thymine base pair. Remembering the phrase "G-CAT" helps one recollect correct pairing. Which nitrogen base would bind with a guanine nucleotide in forming double-stranded DNA?

  A. Cytosine

  B. Uracil

  C. Thymine

  D. Adenine

  Correct Answer: A

• Question 60:

  Which of the following could reduce the risk of a patient becoming infected with a hospital acquired infection?

  A. Antibiotic therapy

  B. Chemotherapy

  C. Proper handwashing procedure

  D. Pre-surgical testing

  Correct Answer: C