A student develops four models for the composition of a eukaryotic cell. The weight of the cell is broken down as the percentage of the total cell weight for each of the components. Which model indicates the CORRECT percentage values for the components of an actual cell and why? A Model A because this model shows that nucleic acids are the most abundant macromolecule, and nucleic acids are the most important macromolecule because they contain genetic information. B Model B because this model shows that proteins are the most abundant macromolecule, and proteins are the most important macromolecule because they are the most diverse and are involved in many cell structures and functions. C Model C because this model shows that phospholipids are the most abundant macromolecule, and phospholipids are the most important macromolecule because they are the main component of the cell membrane. D Model D because this model shows that nucleic acids are the least abundant macromolecule, and the functions of the nucleic acids are carried out in the nucleus rather than the cytoplasm.
A student develops four models for the composition of a eukaryotic cell. The weight of the cell is broken down as the percentage of the total cell weight for each of the components. Which model indicates the CORRECT percentage values for the components of an actual cell and why? A Model A because this model shows that nucleic acids are the most abundant macromolecule, and nucleic acids are the most important macromolecule because they contain genetic information. B Model B because this model shows that proteins are the most abundant macromolecule, and proteins are the most important macromolecule because they are the most diverse and are involved in many cell structures and functions. C Model C because this model shows that phospholipids are the most abundant macromolecule, and phospholipids are the most important macromolecule because they are the main component of the cell membrane. D Model D because this model shows that nucleic acids are the least abundant macromolecule, and the functions of the nucleic acids are carried out in the nucleus rather than the cytoplasm.
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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Concept explainers
Structure and Composition of Cell Membrane
Despite differences in structure and function, all living cells in multicellular organisms are surrounded by a cell membrane. Just like the outer layer of the skin separates the body from its environment similarly, the cell membrane, also known as 'plasma membrane,' separates the inner content from its exterior environment.
Cell Membrane
The cell membrane is known by different names like plasma membrane or cytoplasmic membrane, or biological membrane. The term "cell membrane" was first introduced by C. Nageli and C. Cramer in the year 1855. Later on, in 1931, the term "plasmalemma" for cell membrane was given by J. Plowe. The cell membrane separates the cell's internal environment from the extracellular space. This separation allows the protection of cells from their environment.
Prokaryotes vs Eukaryotes
The cell is defined as the basic structural and functional unit of life. The cell membrane bounds it. It is capable of independent existence.
Question
A student develops four models for the composition of a eukaryotic cell. The weight of the cell is broken down as the percentage of the total cell weight for each of the components.
Which model indicates the CORRECT percentage values for the components of an actual cell and why?
A
Model A because this model shows that nucleic acids are the most abundant macromolecule, and nucleic acids are the most important macromolecule because they contain genetic information.
B
Model B because this model shows that proteins are the most abundant macromolecule, and proteins are the most important macromolecule because they are the most diverse and are involved in many cell structures and functions.
C
Model C because this model shows that phospholipids are the most abundant macromolecule, and phospholipids are the most important macromolecule because they are the main component of the cell membrane.
D
Model D because this model shows that nucleic acids are the least abundant macromolecule, and the functions of the nucleic acids are carried out in the nucleus rather than the cytoplasm.
Transcribed Image Text:A student develops four models for the composition of a eukaryotic cell. The weight of the cell is broken down as the percentage of the total cell weight for each of the components.
Percentage of Total Weight in the Cell
Model B
A
Water
B
Inorganic ions
(sodium, potassium, etc.)
Proteins
RNA
Component
Phospholipids
Polysaccharides
Other
0.25
1
18
Model A
1.1
5
2
3
70
1
18
1.1
5
2
3
70
1
0.25
Model C
1.1
5
2
3
70
1
18
Model D
0.25
5
2
3
Which model indicates the CORRECT percentage values for the components of an actual cell and why?
Model A because his model shows that nucleic acids are the most abundant macromolecule, and nucleic acids are the most important macromolecule because they contain genetic
information.
Model B because this model shows that proteins are the most abundant macromolecule, and proteins are the most important macromolecule because they are the most diverse and are
involved in many cell structures and functions.
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