Question 1

Which part of the compound light microscope is responsible for adjusting the amount of light that reaches the specimen?

Accepted Answer

Diaphragm

Question 2

What is the total magnification when using a 40× objective lens with a 10× ocular lens?

Accepted Answer

$$40 	imes 10 = 400$$

Question 3

Which of the following best describes the change in field of view as you increase magnification from 4× to 100×?

Accepted Answer

The field of view decreases

Question 4

Why is immersion oil used with the 100× objective lens?

Accepted Answer

To improve resolution by reducing light refraction

Question 5

Which of the following is NOT a characteristic shared by all cells?

Accepted Answer

Presence of a cell wall

Question 6

A scientist observes a cell with a nucleus, mitochondria, and chloroplasts. To which domain and kingdom does this organism most likely belong?

Accepted Answer

Domain Eukarya, Kingdom Plantae

Question 7

Which bacterial morphology is depicted by rod-shaped cells?

Accepted Answer

Bacillus

Question 8

A cluster of spherical bacteria is observed under the microscope. What is the correct term for this arrangement?

Accepted Answer

Staphylococcus

Question 9

Which of the following statements about Gram-positive bacteria is correct?

Accepted Answer

They have a thick peptidoglycan layer and stain purple

Question 10

Which microscope part should only be used with the lowest power objective to avoid damaging the slide or lens?

Accepted Answer

Coarse focus knob

Question 11

Which of the following is true about viruses?

Accepted Answer

They are neither prokaryotic nor eukaryotic

Question 12

What type of microscope is required to view viruses due to their small size?

Accepted Answer

Electron microscope

Question 13

Which of the following characteristics of life do viruses lack?

Accepted Answer

Ability to reproduce independently

Question 14

When observing a stained slide of Rhizopus stolonifer under the microscope, what structure is responsible for producing spores?

Accepted Answer

Sporangium

Question 15

Which of the following best explains why stains are used when viewing cells under a light microscope?

Accepted Answer

To enhance contrast and make structures more visible

Question 16

A student prepares a wet mount of Elodea and observes green structures inside the cells. What are these structures and what is their function?

Accepted Answer

Chloroplasts; photosynthesis

Question 17

Which of the following best describes the change in depth of field as magnification increases?

Accepted Answer

Depth of field decreases

Question 18

Which of the following is a correct sequence for preparing a wet mount of human cheek cells for microscopic observation?

Accepted Answer

Scrape cheek, place cells on slide, add water, add coverslip, add methylene blue

Question 19

Which of the following is a unique feature of prokaryotic cells compared to eukaryotic cells?

Accepted Answer

DNA located in a nucleoid region

Question 20

A scientist is using a microscope and wants to avoid contaminating the dry lenses with oil. What is the correct procedure?

Accepted Answer

Clean the dry lenses first, then the oil immersion lens

Microscopy and Diversity of Life: Study Guide for General Biology

Guida di studio - Domande di pratica