Concept explainers
To determine: Whether the given measurements agree or not.
Concept introduction: Cells are the smallest structural, functional, and biological unit of all living organisms. They are modified in different ways to carry out various functions. They are divided into two types, namely prokaryotic and eukaryotic cell. Prokaryotes are single-celled organisms, and eukaryotes are mostly multicellular organisms. Protists and
To determine: The measurement of the observer who is most likely to be correct if the cells are prokaryotic cells.
Concept introduction: Cells are the smallest structural, functional, and biological unit of all living organisms. They are modified in different ways to carry out various functions. They are divided into two types, namely prokaryotic and eukaryotic cell. Prokaryotes are single-celled organisms, and eukaryotes are mostly multicellular organisms. Protists and fungi are eukaryotes that are single-celled organisms. Plants and animals are the eukaryotes that are multi-celled organisms.
To determine: The measurement of the observer that is most likely to be correct if the cells are eukaryotic cells.
Concept introduction: Cells are the smallest structural, functional, and biological unit of all living organisms. They are modified in different ways to carry out various functions. They are divided into two types, namely prokaryotic and eukaryotic cell. Prokaryotes are single-celled organisms, and eukaryotes are mostly multicellular organisms. Protists and fungi are eukaryotes that are single-celled organisms. Plants and animals are the eukaryotes that are multi-celled organisms.
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Biology (MindTap Course List)
- Measure the length of Cell X using the ruler in Microsoft Word. Assuming the actual length to be 3 um, calculate the magnification. Show your complete solution. Based on Figure 1, what internal organization can be distinguished in cell X? Why? Based in Figure 1, can you see a limiting membrane? Can you deduce its presence? Why or why not? Figure 2 is an electron micrograph of the same type of bacterium as shown in Figure 1. The picture has been obtained by cutting a very thin section of the bacterial cell along its longitudinal axis. Measure the total length of the cell, and assuming the actual length to be 2.1 um, calculate the magnification. With reference with Figure 2, what are the major differences between the inclusions found in Figure 1 and the way they appear in Figure 2? What other structural features can be resolved?arrow_forwardA) The size of a cell seen under a microscope is 3mm Using a total magnification of 40x. What is the actual cell size and decide if the cell is prokaryote or eukaryote based on its size?arrow_forwardWhich of the following microscopes typically requires the use of vital dyes (like methylene blue) to visualize large subcellular structures in a living cell (like the nucleolus or the mitochondrion)? the scanning/tunneling electron microscope (STEM), with good resolution up to about 100,000,000x the transmission electron microscope (TEM), with good resolution up to about 100,000x the scanning electron microscope (SEM), with good resolution up to about 1,000,000x the compound light microscope, with good resolution up to about 1,500x all of the above microscopes would be equally useful in visualizing the interior of organellesarrow_forward
- Calculate the width of all 3 cells in micrometers. Use scale. Of a 40x objective.arrow_forwardFigure 4.7 Prokaryotic cells are much smaller than eukaryotic cells. What advantages might small cell size confer on a cell? What advantages might large cell size have?arrow_forwardAfter investigation of a specimen under light microscope and electron microscope, numerous amounts of spherical shaped particles were seen in the electron microscope while this type of structure was not visible under the light microscope. Further characterization revealed that these particles lack cellular organelles (like the nucleus, mitochondria…). Considering the above circumstance, answer the following questions. (A) What do you think would be the size of the specimen? (B) What do you suspect these particles are most likely to be? (C) Would you define these particles as living? Why/why not-justify your answer brieflyarrow_forward
- Draw to scale the outline of two spherical cells, one a bacterium with a diameter of 1 μm, the other an animal cell with a diameter of 15 μm. Calculate the volume, surface area, and surface-to-volume ratio for each cell. how would the latter ratio change if you included the internal membranes of the cell in the calculation of surface area (assume internal membranes have 15 times the area of the plasma membrane)? (the volume of a sphere is given by 4πr3/3 and its surface by 4πr2, where r is its radius.) discuss the following hypothesis: “internal membranes allowed bigger cells to evolve.”arrow_forwardCathy placed a sample of yeast, a single-celled eukaryotea closed test tube containing a solution of glucose. How will the composition of the air in the test tube change as the yeast interacts with the glucose?arrow_forwardYou are observing a cell in the microscope at 100X and determine that it has a length of 15 ocular units (o.u.). What is the actual length of the cell? Question options: 150 µm 0.15 µm 15 µm 1,500 µmarrow_forward
- You have an original cell density of 4.3x10 8CF/mL. What is this number in its non-scientific notation or "regular" format?. 43,000,000CF/mL. 0.000000043CfU/mL. 430,000,000CFU/mL. 0.00000043CFU/mL. 4.3CFU/mLarrow_forwardAssume the diameter of the field of vision in your microscope is 1.75mm under low pressure. If one bacillus is 5um, how many bacillus cell could fit end to end across the field. How many 7um yeast cells could fit across the field?arrow_forwardExplain (using the correct terminology and drawing an image) what happens to the cells in the following environments: A human blood cell (0.9% salt) is placed in a saltwater tank (27.5% salt). - A bacterial cell with 35% organic material in their cytoplasm is living in a tank filled with 35% sulfur. - A freshwater plant cell (75% water) is living in a pond that floods over.arrow_forward
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