MICR 290 COMPREHENSIVE
EXAMINATION TEST QUESTIONS AND
SOLUTIONS FULLY VERIFIED
●● what does PPE include?
Answer: includes but not limited to:
- lab coats
- chemical aprons
- face masks
●● what are the general most important safety habits when working in a
lab?
Answer: don't touch face and mouth
disinfect workplace w/ 70% alcohol
wash hands frequently even when wearing gloves
●● what type of microscope did you observe in the video?
Answer: compound binocular light microscope
●● what is the magnification power of the compound microscope at 40x
objective and 100x objective lens power?
, Answer: total magnification power of compound microscope at 40x is
400x
total magnification power of compound microscope at 100x is 1000x
●● if a bacterium is 2 micrometers long, how many millimeters long
does it appear under the 40x objective lens? how many millimeters long
does it appear under the oil immersion lens?
Answer: 2 μm at 400× = 0.8 mm = 800 micro
2 μm at 1000× = 2.0 mm = 2000 micro
●● what is meaning of aseptic technique?
Answer: without contamination technique
●● what is inoculation
Answer: process of transferring the microbes from one medium to
another
●● what is inoculum
Answer: the microorganisms being transferred
●● what is the commonly used tool for bacterial inoculation
Answer: wire loop
inoculation loop
EXAMINATION TEST QUESTIONS AND
SOLUTIONS FULLY VERIFIED
●● what does PPE include?
Answer: includes but not limited to:
- lab coats
- chemical aprons
- face masks
●● what are the general most important safety habits when working in a
lab?
Answer: don't touch face and mouth
disinfect workplace w/ 70% alcohol
wash hands frequently even when wearing gloves
●● what type of microscope did you observe in the video?
Answer: compound binocular light microscope
●● what is the magnification power of the compound microscope at 40x
objective and 100x objective lens power?
, Answer: total magnification power of compound microscope at 40x is
400x
total magnification power of compound microscope at 100x is 1000x
●● if a bacterium is 2 micrometers long, how many millimeters long
does it appear under the 40x objective lens? how many millimeters long
does it appear under the oil immersion lens?
Answer: 2 μm at 400× = 0.8 mm = 800 micro
2 μm at 1000× = 2.0 mm = 2000 micro
●● what is meaning of aseptic technique?
Answer: without contamination technique
●● what is inoculation
Answer: process of transferring the microbes from one medium to
another
●● what is inoculum
Answer: the microorganisms being transferred
●● what is the commonly used tool for bacterial inoculation
Answer: wire loop
inoculation loop
