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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EBK BIOLOGY
- What type of micrograph is shown below? Is the organism pictured prokaryotic or eukaryotic? How can you tell?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_forwardYou prepared a 7x 10^5x dilution from your bacterial culture, plated 0.2 ml of it on a Petridish and counted 67 cfu. What was the cell density of your bacterial culture (in cfu/ml? How many cells did you have in total if the volume of your culture was 50ml? Round to a whole number, do not write in scientific notation. The cell density of my bacterial culture was cfu/ml. The total number of cells wasarrow_forward
- Is it 100X for Paramecium? Is it 400X for Euglena? I don't know how to solve this problem. I don't know what should I draw the picture of the Paramecium and Euglena.arrow_forwardIf the diameter of the field of view in your microscope is 2 mm under low power, and one Bacillus cell is 2 µm long, how many Bacillus cells would it take to reach all the way across this field of view? If yeast cells measure 10 µm in length, how many yeast cells would it take to reach across this same field of view?arrow_forwardThe following image shows part of counting chamber you used to estimate cell viability for yeast cells. If the dilution factor you used was 1:200, and the total sample volume was 5 ml, then calculate the cell viability, the cell density and the total cell.arrow_forward
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- Which 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_forwardIn a reproduction of an experiment famously performed by Louis Pasteur, you cultured yeast in the absence of oxygen (anaerobic growth) and measured (1) the rate of cell division, (2) the rate of glucose consumption, and (3) the intracellular ATP:ADP ratio. You then moved the cells to an incubator containing normal atmosphere (i.e., 21% oxygen), completed a second set of measurements, and made the following observations: The rate of cell division increased considerably after the addition of oxygen (aerobic growth) Glucose consumption dropped dramatically after the addition of oxygen Intracellular ATP:ADP ratios increased significantly (from 2:1 in the absence of oxygen to 10:1 in the presence of oxygen) Explain how the mitochondria in the yeast contribute to the dramatic drop in glucose utilization and increase in ATP concentrations in the presence of oxygen.arrow_forwardthe options are 2 µm 10 µm 150 µm 50 µmarrow_forward
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