General questions
- One is not involved in colorimetric:
a) Cuvette
b) Light source
c) Photo sensor and analyzer
d) Fuel source
e) Filter ✅
- The atomic mass of an atom is the number of:
a) Protons and neutrons ✅
b) Protons only
c) Neutrons only
d) Electrons
e) None of the above
- Deionization of impure water means:
a) Boiling
b) Filtration
c) Exchange of protons and electrons ✅
- If you see this sign (symbol) in the lab, it means:
a) Flammable
b) Corrosive
c) Oxidizing
d) Explosive
e) Toxic ✅
- Most common method (technique) used to detect hormone amount in the laboratories:
a) Spectrophotometry
b) Enzyme Linked Immuno Sorbent Assay (ELISA) ✅
- Test should be kept away from light:
a) Serum bilirubin ✅
- Buffer solution is:
a) Changing color when changing pH
b) Resist acidic pH
c) Resist alkaline pH
d) Weak acid + weak base
e) Strong acid + weak base ✅
- An indicator is:
a) Change color with change pH ✅
b) Resist acidic pH
c) Resist alkaline pH
d) Weak acid + weak base
e) Strong acid + weak base
- Heparin is:
a) Protein
b) Enzyme
c) Polysaccharide ✅
d) Oligosaccharide
e) None of the above
- Not found in flame photometry:
a) Burner
b) Filter ✅
c) Fuel source
d) Cuvette for sample
e) Photo
- Low effective sterilization with:
a) Ethyl alcohol 70%
b) Methyl alcohol
c) Chloroform
d) 5% phenol
e) 5% cresol ✅
- Prolonged fasting causes:
a) Hyperglycemia
b) Ketones in urine ✅
- Lens near the slide in a light microscope:
a) Objective ✅
b) Eye lenses
- Does not sterilize with a hot air oven:
a) Dry glassware
b) Oil
c) Powder
d) Waxes
e) Rubber gloves ✅
- Autoclave sterilizes at a temperature of:
a) 121°C for 20-30 minutes ✅
- Alkali skin burn treatment by neutralization with:
a) Sodium bicarbonate powder ✅
b) Boric acid
c) Acetic acid 1%
d) Cold water
e) Hot water
- You do not take this stage for treating a small cut in an emergency:
a) Clean with soap and water
b) Apply pressure with a piece
c) Immediately rinse mouth well with water
d) Cover it with a sterile dressing
e) Sterilize ✅
- The (U) unit is used to evaluate:
a) Protein in serum
b) Hemoglobin
c) Hormone assay
d) Enzymatic activity ✅
- During the reaction of two chemical substances, the color produced is assessed by:
a) Spectrophotometer ✅
b) Flame photometer
- To detect pH from a solution, use:
a) pH meter
b) Indicator
c) Micrometer
- This symbol means, when you see it in the laboratory:
a) Acute flammable
b) Toxic
c) Corrosive
d) Explosive ✅
- The microscope used to investigate syphilis is:
a) Light microscope
b) Ultraviolet microscope
c) Dark field microscope ✅
- How much water should we add to 500ml of a 10% NaOH solution to bring it to 7.5%?
a) 666
b) 250
c) 166 ✅
- Calibrator sera are:
a) Secondary standards
b) Internal standards
c) Primary standards ✅
- A buffer is made of:
a) A strong acid + a strong salt
b) A weak acid + a weak salt
c) A weak acid + a strong salt ✅
- The difference between plasma and serum is that plasma:
a) Does not contain fibrinogen
b) Has more water
c) Contains fibrinogen (Plasma) ✅
- Five ml of a colored solution has an absorbance of 0.500nm. The absorbance of 10ml of the same solution is:
a) 1.000nm
b) 0.250nm
c) 0.500nm ✅
- Plasma or serum should be separated at the earliest time for glucose estimation because:
a) Glucose value increases with time
b) Lysis of blood will occur
c) Glucose value decreases with time ✅
- Wavelength visible to the naked eye:
a) 400-700 nm ✅
- Purpose of standard deviation:
a) To measure external quality control
b) To measure internal quality control
c) Precision & accuracy
d) Both a & b ✅
- Substance used in catalyzing reactions:
a) H2O2 ✅
- The concentration of total bilirubin in the serum of a normal adult ranges at:
a) 0.1 – 1 mg/dl ✅
b) 0.1 – 1 µg/dl
c) 1 – 10 mg/dl
d) 10 – 20 mg/dl
e) 100 – 110 mg/dl
- Laboratory tests of hepatic function include:
a) Serum bilirubin
b) Urine bilirubin
c) Excretory function test
d) All of the above ✅
- Marked elevations in serum amylase levels are seen in:
a) Bone disease
b) Acute pancreatitis
c) Salivary gland lesions
d) Liver disease
e) B and C ✅
- Glycogen, the storage form of carbohydrates in the body, is predominantly found in:
a) Liver tissue
b) Muscle tissue
c) Liver and muscle ✅
d) Bone
e) B and D
- The hormone insulin helps to maintain constant plasma glucose concentration by:
a) Allowing entry of glucose from plasma into muscle and fat tissue ✅
b) Moving glucose out of cells into the plasma
c) Inhibiting glycolysis
d) All the above mechanisms
e) None of the above mechanisms
