Lab Technician Questions – Set 1
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Lab Technician Questions – Set 1 - sample questions with answers
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1. What does a negative result after adding Coombs control cells in a crossmatch indicate?
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Answer: Antiglobulin reagent was not added, neutralized, or inactivated
A negative result after adding Coombs control cells indicates that the antiglobulin reagent was not added, was neutralized, or was inactivated.
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2. Blood creatinine determination methods are primarily based on which reaction?
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Answer: Reaction between creatinine and alkaline picrate
The reaction between creatinine and alkaline picrate is used to determine blood creatinine levels.
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3. What generally happens to the size of blood cells as they mature?
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Answer: Size decreases
Blood cells generally decrease in size as they undergo the maturation process.
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4. To prepare a 1:5 dilution of a serum sample, how many mL of diluent should be mixed with 1.0 mL of serum?
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Answer: 4.0 mL
A 1:5 dilution means the total volume is 5 parts, so 1 part serum and 4 parts diluent are mixed.
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5. Patients with blood group O can safely receive plasma from donors of which groups?
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Answer: A, AB, or O
Group O patients can safely receive plasma from donors of group A, AB, or O.
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6. Toward which pole do serum proteins migrate in an electrical field when using a buffer with a pH of 8.6?
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Answer: Positive pole
Serum proteins migrate toward the positive pole when using a buffer with a pH of 8.6 in an electrical field.
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7. What is the role of Safranin in the Gram stain process?
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Answer: Secondary stain
Safranin serves as a secondary stain in a Gram stain.
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8. Which hormone directly regulates blood glucose levels?
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Answer: Insulin
Insulin helps regulate blood glucose levels by facilitating the entry of glucose into cells.
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9. What will be the Rh group of the offspring of an Rh(D) negative mother and a homozygous Rh(D) positive father?
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Answer: All heterozygous Rh(D) positive
Offspring of an Rh(D) negative mother (dd) and a homozygous Rh(D) positive father (DD) will all be heterozygous (Dd), meaning they are Rh(D) positive.
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10. What is the appearance of Cerebrospinal fluid (CSF) in patients with post-cerebral hemorrhage?
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Answer: Light yellow or straw colored
Following a cerebral hemorrhage, the cerebrospinal fluid typically appears light yellow or straw colored.
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11. What is the typical color of dilute normal urine?
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Answer: Pale yellow
Dilute normal urine is typically pale yellow in color.
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12. What type of bacteria is Clostridium Botulinum?
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Answer: Strict anaerobe
Clostridium Botulinum is a strict anaerobe, meaning it requires an environment devoid of oxygen to grow.
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13. An elevated leukocyte count with increased neutrophilic granulocytes usually indicates what?
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Answer: Bacterial infection
An increase in neutrophilic granulocytes typically indicates a bacterial infection.
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14. Which serum is used to determine if a patient is blood type A1 or A2?
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Answer: Dolichos Biflorus Serum
Dolichos Biflorus Serum is used to differentiate between blood type A1 and A2.
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15. Reagin reactivity in serologic tests for syphilis can result from which of the following conditions?
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Answer: Chronic infections such as Lupus Erythematosus
Chronic conditions such as Lupus Erythematosus can cause Reagin reactivity in serologic tests for syphilis.
This chapter has 30 questions. Practise them all with timing, answers and explanations.