TTU MBIO 3400 Lab Exam 1 Questions
& Answers (Grade A+)
Microorganisms -
correct answer ✅Too small to be seen by the naked eye
Organisms in order of size (smallest to largest) -
correct answer ✅Viruses (0.1um), bacteria (1-5um), eukaryotic
organism (fungi and protozoans, 10um-visible)
Most important instrument in the history of microbio -
correct answer ✅Light microscope
Dissecting microscope -
correct answer ✅Used to view larger specimens and can magnify
between 10-200x more than what the naked eye can see
Compound light microscope -
correct answer ✅Used to view much smaller objects and can
magnify between 100-1000x more than what the naked eye can see
Objectives -
correct answer ✅Lenses closest to the specimen on the
microscope slide (10x, 40x, 100x)
,TTU MBIO 3400 Lab Exam 1 Questions
& Answers (Grade A+)
Nosepiece -
correct answer ✅Holds the objectives and can be rotated to
change the magnification
What does the objective number (magnification) indicate? -
correct answer ✅How large the image created by the objective is
relative to the object that forms it
10x objective is also called -
correct answer ✅Low power objective
40x objective is also called -
correct answer ✅High dry objective
100x objective is also called -
correct answer ✅Oil immersion objective
What should you never do with low power objectives and why? -
correct answer ✅Never use oil with them because it might soak
into the side of the objective and ruin its optical properties
, TTU MBIO 3400 Lab Exam 1 Questions
& Answers (Grade A+)
Parfoacal -
correct answer ✅Once the low-power objective has been focused
sharply on the specimen, the high-dry and oil immersion objectives
will also be approximately in focus after they are rotated in place
What does shifting an object with a higher magnification do? -
correct answer ✅Decreases the size of the field of view and a
specimen at the edge of the field will no longer be in view
What lense is located at the top of the microscope? -
correct answer ✅Ocular (eyepiece)
Total magnification -
correct answer ✅Product of the seperate magnifications of the
objective and ocular lenses
Condenser diaphragm -
correct answer ✅Adjust amount of light focused on specimen
Microscope stage -
correct answer ✅The flat platform where you place the slide
& Answers (Grade A+)
Microorganisms -
correct answer ✅Too small to be seen by the naked eye
Organisms in order of size (smallest to largest) -
correct answer ✅Viruses (0.1um), bacteria (1-5um), eukaryotic
organism (fungi and protozoans, 10um-visible)
Most important instrument in the history of microbio -
correct answer ✅Light microscope
Dissecting microscope -
correct answer ✅Used to view larger specimens and can magnify
between 10-200x more than what the naked eye can see
Compound light microscope -
correct answer ✅Used to view much smaller objects and can
magnify between 100-1000x more than what the naked eye can see
Objectives -
correct answer ✅Lenses closest to the specimen on the
microscope slide (10x, 40x, 100x)
,TTU MBIO 3400 Lab Exam 1 Questions
& Answers (Grade A+)
Nosepiece -
correct answer ✅Holds the objectives and can be rotated to
change the magnification
What does the objective number (magnification) indicate? -
correct answer ✅How large the image created by the objective is
relative to the object that forms it
10x objective is also called -
correct answer ✅Low power objective
40x objective is also called -
correct answer ✅High dry objective
100x objective is also called -
correct answer ✅Oil immersion objective
What should you never do with low power objectives and why? -
correct answer ✅Never use oil with them because it might soak
into the side of the objective and ruin its optical properties
, TTU MBIO 3400 Lab Exam 1 Questions
& Answers (Grade A+)
Parfoacal -
correct answer ✅Once the low-power objective has been focused
sharply on the specimen, the high-dry and oil immersion objectives
will also be approximately in focus after they are rotated in place
What does shifting an object with a higher magnification do? -
correct answer ✅Decreases the size of the field of view and a
specimen at the edge of the field will no longer be in view
What lense is located at the top of the microscope? -
correct answer ✅Ocular (eyepiece)
Total magnification -
correct answer ✅Product of the seperate magnifications of the
objective and ocular lenses
Condenser diaphragm -
correct answer ✅Adjust amount of light focused on specimen
Microscope stage -
correct answer ✅The flat platform where you place the slide
