MLS 220 Exam 3 Questions and Answers (CHEM
ANALYTICAL)
Which of the following describes an assay in which the amount of an
analyte present is determined?
a. Manual
b. Qualitative
c. Automated
d. Quantitative - ANSWER-d. Quantitative
A benefit of automated instrumentation in the clinical laboratory is:
a. Smaller sample size requirements
b. Increased precision and accuracy
c. Faster turnaround time
d.All of the above - ANSWER-d.All of the aboveLight travels in:
Light travels in:
a. Planes
, MLS 220 Exam 3 Questions and Answers (CHEM
ANALYTICAL)
b. Waves
c. Flashes
d. Lasers - ANSWER-b. Waves
Which wavelengths describe visible light:
a. ~260 - 600 nm
b. ~500 - 900 nm
c. ~380 - 700 nm
d. ~400 - 940nm - ANSWER-c. ~380 - 700 nm
If the color of an object is red, the other colors of the energy spectrum
(orange, yellow, green, blue, purple, etc.) are:
a. Absorbed
b. Deflected
c. Expressed
d. Transmitted - ANSWER-a. Absorbed
In Plank's equation, what do E and γrepresent, and how do they relate to
each other?
a. E = Energy, γ = Frequency; Directly Proportional
, MLS 220 Exam 3 Questions and Answers (CHEM
ANALYTICAL)
b. E = Energy, γ = Wavelength; Inversely Proportional
c. E = Energy, γ = Frequency; Inversely Proportional
d. E = Energy, γ = Wavelength; Directly Proportional - ANSWER-b. E
= Energy, γ = Wavelength; Inversely Proportional
According to Beer's law, the amount of light __________ by a solution
is ___________ proportional to the ___________ of a solution:
a. transmitted ; directly ; concentration
b. transmitted ; inversely ; concentration
c. absorbed ; directly ; concentration
d. absorbed ; inversely ; concentration - ANSWER-c. absorbed ; directly
; concentration
The measurement of light at selected wavelengths, typically in the
ranges of ultraviolet (UV), visible, and infrared light, is known as:
, MLS 220 Exam 3 Questions and Answers (CHEM
ANALYTICAL)
a. Photometry
b. Refractometry
c. Luminometry
d. Spectrophotometry - ANSWER-d. Spectrophotometry
The component of the spectrophotometer that isolates radiant energy of
a desired wavelength while excluding other unwanted wavelengths is
known as the:
a. Monochromator
b. Light Source
c. Cuvette
d. Photodetector - ANSWER-a. Monochromator
The analytical method based on detection of the portion of light
scattered by the particles in a solution toward a detector not in the direct
path of the transmitted light is known as:
a. Turbidimetry
b. Absorbance Spectrophotometry
c. Refractometry
d. Nephelometry - ANSWER-d. Nephelometry
ANALYTICAL)
Which of the following describes an assay in which the amount of an
analyte present is determined?
a. Manual
b. Qualitative
c. Automated
d. Quantitative - ANSWER-d. Quantitative
A benefit of automated instrumentation in the clinical laboratory is:
a. Smaller sample size requirements
b. Increased precision and accuracy
c. Faster turnaround time
d.All of the above - ANSWER-d.All of the aboveLight travels in:
Light travels in:
a. Planes
, MLS 220 Exam 3 Questions and Answers (CHEM
ANALYTICAL)
b. Waves
c. Flashes
d. Lasers - ANSWER-b. Waves
Which wavelengths describe visible light:
a. ~260 - 600 nm
b. ~500 - 900 nm
c. ~380 - 700 nm
d. ~400 - 940nm - ANSWER-c. ~380 - 700 nm
If the color of an object is red, the other colors of the energy spectrum
(orange, yellow, green, blue, purple, etc.) are:
a. Absorbed
b. Deflected
c. Expressed
d. Transmitted - ANSWER-a. Absorbed
In Plank's equation, what do E and γrepresent, and how do they relate to
each other?
a. E = Energy, γ = Frequency; Directly Proportional
, MLS 220 Exam 3 Questions and Answers (CHEM
ANALYTICAL)
b. E = Energy, γ = Wavelength; Inversely Proportional
c. E = Energy, γ = Frequency; Inversely Proportional
d. E = Energy, γ = Wavelength; Directly Proportional - ANSWER-b. E
= Energy, γ = Wavelength; Inversely Proportional
According to Beer's law, the amount of light __________ by a solution
is ___________ proportional to the ___________ of a solution:
a. transmitted ; directly ; concentration
b. transmitted ; inversely ; concentration
c. absorbed ; directly ; concentration
d. absorbed ; inversely ; concentration - ANSWER-c. absorbed ; directly
; concentration
The measurement of light at selected wavelengths, typically in the
ranges of ultraviolet (UV), visible, and infrared light, is known as:
, MLS 220 Exam 3 Questions and Answers (CHEM
ANALYTICAL)
a. Photometry
b. Refractometry
c. Luminometry
d. Spectrophotometry - ANSWER-d. Spectrophotometry
The component of the spectrophotometer that isolates radiant energy of
a desired wavelength while excluding other unwanted wavelengths is
known as the:
a. Monochromator
b. Light Source
c. Cuvette
d. Photodetector - ANSWER-a. Monochromator
The analytical method based on detection of the portion of light
scattered by the particles in a solution toward a detector not in the direct
path of the transmitted light is known as:
a. Turbidimetry
b. Absorbance Spectrophotometry
c. Refractometry
d. Nephelometry - ANSWER-d. Nephelometry
