Question 1

Which part of the microscope is responsible for making large adjustments to the distance between the objective lens and the specimen?

Accepted Answer

Coarse focus knob

Question 2

What is the primary function of the fine focus knob on a microscope?

Accepted Answer

To make small, precise adjustments to the focus after using the coarse focus

Question 3

Why is immersion oil used with a 100x objective lens?

Accepted Answer

To concentrate the path of light and increase the resolution of the image

Question 4

What is the main purpose of lens paper in microscopy?

Accepted Answer

To clean lenses and other glass components without introducing scratches

Question 5

A student is using a microscope and wants to increase the resolution of their image at high magnification. Which of the following should they use?

Accepted Answer

Immersion oil

Question 6

Which of the following best describes the function of the base of a microscope?

Accepted Answer

It supports the entire microscope structure

Question 7

If a student uses regular tissue instead of lens paper to clean a microscope lens, what is the most likely outcome?

Accepted Answer

The lens may become scratched

Question 8

Which step should be performed first when focusing a specimen under a microscope?

Accepted Answer

Use the coarse focus knob

Question 9

A student observes that their image is blurry even after using the coarse focus knob. What should they do next?

Accepted Answer

Use the fine focus knob for smaller adjustments

Question 10

Which of the following statements about immersion oil is correct?

Accepted Answer

It is used exclusively with 100x or higher objective lenses

Question 11

What is the effect of using immersion oil incorrectly (e.g., with a 40x objective lens)?

Accepted Answer

It may damage the lens and reduce image quality

Question 12

Which of the following best explains why the fine focus knob is used after the coarse focus knob?

Accepted Answer

To make precise adjustments for a sharper image

Question 13

A student is preparing to use a microscope at 100x magnification. Which of the following steps is necessary to achieve the best image resolution?

Accepted Answer

Apply immersion oil between the slide and the objective lens

Question 14

Which of the following is NOT a function of the base of a microscope?

Accepted Answer

Adjusting the focus

Question 15

Why is it important to use lens paper instead of regular paper when cleaning microscope lenses?

Accepted Answer

Lens paper does not introduce scratches

Microscope Components and Their Functions

Study Guide - Practice Questions