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Small Lipids Atom Molecules Proteins Virus Bacteria 31 Only an electron microscope can be used to view (1) bacteria (2) mitochondria Organelles Source: Adapted from https://microbiologyinfo.com/different-size-shape-and-arrangement-of-bacteria- Eukaryotic Cells (animal and plant cells) (3) animal cells (4) viruses

Small Lipids Atom Molecules Proteins Virus Bacteria 31 Only an electron microscope can be used to view (1) bacteria (2) mitochondria Organelles Source: Adapted from https://microbiologyinfo.com/different-size-shape-and-arrangement-of-bacteria- Eukaryotic Cells (animal and plant cells) (3) animal cells (4) viruses

Human Anatomy & Physiology (11th Edition)
Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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### Understanding the Sizes of Various Biological Structures #### Sizes of Various Objects Division Chart This chart illustrates the relative sizes of different biological structures and which types of microscopes are needed to view them. The objects range from atoms to eukaryotic cells and are viewed under either an electron microscope or a light microscope, depending on their size. ##### Objects and their Measurements: - **Atoms**: ~0.1 nm - **Small Molecules**: ~1 nm - **Lipids**: ~10 nm - **Proteins**: ~10 nm - **Viruses**: ~100 nm - **Bacteria**: ~1 µm - **Organelles**: ~10 µm - **Eukaryotic Cells**: ~100 µm #### Questions **31. Only an electron microscope can be used to view:** 1. bacteria 2. mitochondria 3. animal cells 4. viruses **32. A scientist is developing a system to remove harmful bacteria from a contaminated water supply. In order to trap the bacteria and prevent them from going through the filter, she must make sure the pores in the filter are no larger than:** 1. 1 nm 2. 1 µm 3. 10 µm 4. 100 µm #### Explanation The electron microscope can view very small structures that range from 0.1 nm to 100 nm, such as atoms and viruses. In contrast, a light microscope is generally used to view somewhat larger structures such as bacteria, organelles, and eukaryotic cells. For the filtration system, bacteria are typically around 1 µm in size. Therefore, to effectively trap bacteria, a filter with pore sizes of no larger than 1 µm would be necessary. Note that neither a 1 nm nor a 100 µm pore size would be appropriate for filtering bacteria which are within the micron size range.
Transcribed Image Text:### Understanding the Sizes of Various Biological Structures #### Sizes of Various Objects Division Chart This chart illustrates the relative sizes of different biological structures and which types of microscopes are needed to view them. The objects range from atoms to eukaryotic cells and are viewed under either an electron microscope or a light microscope, depending on their size. ##### Objects and their Measurements: - **Atoms**: ~0.1 nm - **Small Molecules**: ~1 nm - **Lipids**: ~10 nm - **Proteins**: ~10 nm - **Viruses**: ~100 nm - **Bacteria**: ~1 µm - **Organelles**: ~10 µm - **Eukaryotic Cells**: ~100 µm #### Questions **31. Only an electron microscope can be used to view:** 1. bacteria 2. mitochondria 3. animal cells 4. viruses **32. A scientist is developing a system to remove harmful bacteria from a contaminated water supply. In order to trap the bacteria and prevent them from going through the filter, she must make sure the pores in the filter are no larger than:** 1. 1 nm 2. 1 µm 3. 10 µm 4. 100 µm #### Explanation The electron microscope can view very small structures that range from 0.1 nm to 100 nm, such as atoms and viruses. In contrast, a light microscope is generally used to view somewhat larger structures such as bacteria, organelles, and eukaryotic cells. For the filtration system, bacteria are typically around 1 µm in size. Therefore, to effectively trap bacteria, a filter with pore sizes of no larger than 1 µm would be necessary. Note that neither a 1 nm nor a 100 µm pore size would be appropriate for filtering bacteria which are within the micron size range.
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