Microscope Test Oct 2023

A student is viewing a plant stem cross section using a compound light microscope.

What parts of the microscope should the student use to bring the image into focus?

• A and F

• B and E

• C and D

• D and F

Which activity might lead to damage of a microscope

and specimen?

• cleaning the ocular and objectives with lens paper

• focusing with low power first before moving the high power into position

• using the coarse adjustment to focus the specimen under high power

• adjusting the diaphragm to obtain more light under high power

After switching from the high-power to the low-power objective lens of a compound light microscope, the area of the low-power field will appear

• larger and brighter

• smaller and brighter

• larger and darker

• smaller and darker

The table below shows the position of slides of the letter "e" on the stages of four microscopes. The image of the "e" as seen using each microscope is also shown. Which letters correctly identify the compound microscopes most likely used to provide the information in the table?

• A and D

• B and C

• C and D

• B and D

Which sequence contains the correct order of steps for a student to follow to observe the nucleus of

protozoa in a stained wet mount, using a compound light microscope?

• 1

• 2

• 3

• 4

Base your answer to the following question on the diagram of a compound light microscope below and on your knowledge of biology.

Which parts of this compound light microscope with clean lenses should be used to improve the quality of the image being observed in the high-power field of view?

• ocular and high-power objective

• diaphragm and fine-adjustment knob

• coarse-adjustment knob and low-power objective

• ocular and diaphragm

A microscope with 10× and 40× objectives is used to scan a slide to locate a specimen. The largest field of vision would be provided by using the

• coarse adjustment

• widest diaphragm opening

• 10× objective

• 40× objective

The size of the image of a cell being examined with a microscope is determined by the

• light source and fine adjustment

• stage and stage clips

• objectives and ocular

• diaphragm and coarse adjustment

. Base your answer to the following question on the diagrams below and on your knowledge of biology. Which microscope setup would allow a student to see the largest field?

• A

• B

• C

• D

The diagram at the right represents a strand of algae viewed under the low-power objective of this microscope. Under the high-power objective, how would this same slide appear?

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