Q: Which formula correctly calculates the diameter of the field of view under high power on a microscope?

$$\text{Diameter of high power} = \frac{\text{Diameter of scanning} \times \text{Magnification of scanning}}{\text{Magnification high power}}$$

Q: If the diameter of the field of view under scanning power (4x) is 4 mm, what is the diameter under high power (40x)? Use the formula: $$\text{Diameter of high power} = \frac{\text{Diameter of scanning} \times \text{Magnification of scanning}}{\text{Magnification high power}}$$

$$\frac{4 \times 4}{40} = 0.4 mm$$

Question 1

Which of the following statements best distinguishes prokaryotic cells from eukaryotic cells?

Accepted Answer

Prokaryotic cells do not have a nucleus or membrane-bound organelles, while eukaryotic cells do.

Question 2

A student is using a compound microscope with a 10x ocular lens and a 40x objective lens. What is the total magnification being used?

Accepted Answer

$$10 	imes 40 = 400$$

Question 3

When switching from the scanning lens (4x) to the high power lens (40x) on a compound microscope, what happens to the field of view?

Accepted Answer

The field of view decreases.

Question 4

Which formula correctly calculates the diameter of the field of view under high power on a microscope?

Accepted Answer

$$	ext{Diameter of high power} = \frac{	ext{Diameter of scanning} 	imes 	ext{Magnification of scanning}}{	ext{Magnification high power}}$$

Question 5

Which of the following is a correct safety procedure when using a compound microscope?

Accepted Answer

Use the coarse focus knob only with the scanning lens.

Question 6

A biologist is observing a cell with a nucleus, mitochondria, and endoplasmic reticulum. Which type of cell is she most likely observing?

Accepted Answer

A eukaryotic cell

Question 7

Which of the following protists is classified as a kinetoplastid and is known for causing disease in humans?

Accepted Answer

Trypanosoma levisi

Question 8

A student observes a protist that is both photosynthetic and phagocytotic. What term best describes its nutritional strategy?

Accepted Answer

Mixotrophic

Question 9

Which of the following is NOT a function of the cytoskeleton in eukaryotic cells?

Accepted Answer

Synthesizing proteins

Question 10

Which group of protists includes both red algae and green algae?

Accepted Answer

Archaeplastida

Question 11

A researcher wants to observe the internal structure of a bacterium at very high resolution. Which type of microscope should she use?

Accepted Answer

Transmission electron microscope

Question 12

Which of the following best describes the phylogenetic system of classification?

Accepted Answer

Grouping organisms based on evolutionary ancestry

Question 13

If the diameter of the field of view under scanning power (4x) is 4 mm, what is the diameter under high power (40x)? Use the formula: $$	ext{Diameter of high power} = \frac{	ext{Diameter of scanning} 	imes 	ext{Magnification of scanning}}{	ext{Magnification high power}}$$

Accepted Answer

$$\frac{4 	imes 4}{40} = 0.4 mm$$

Question 14

Which of the following is a characteristic unique to eukaryotic cells?

Accepted Answer

Presence of membrane-bound organelles

Question 15

A student is preparing a wet mount of Euglena. Which supergroup does Euglena belong to?

Accepted Answer

Excavata

Question 16

Which of the following best describes the function of the endoplasmic reticulum (ER) in eukaryotic cells?

Accepted Answer

Protein and lipid synthesis

Question 17

Which of the following protists is a ciliate and commonly used in laboratory studies?

Accepted Answer

Paramecium

Question 18

Amoeba proteus is classified in which supergroup?

Accepted Answer

Unikonta

Question 19

Which of the following is the correct order of steps when focusing a slide using a compound microscope?

Accepted Answer

Start with scanning lens, use coarse focus, switch to higher power, use fine focus

Question 20

Which of the following statements about protists is correct?

Accepted Answer

Protists are a diverse group that can be autotrophic, heterotrophic, or mixotrophic.

Microscopy, Cell Structure, and Protist Diversity

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