The mass of virions in the Pacific Ocean. Introduction: Viruses can be defined as acellular organisms that are obligate intracellular parasites. Viruses lack any cellular organelles but have only genetic material and protein-lipid core. These organisms cannot replicate by themselves, so they require a host cellular machinery to reproduce.

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Definition Definition Organism that lives in the body of another organism and obtains food at the expense of the host. A parasite can directly or indirect harm the host. There are two kinds of parasites: internal and external. An internal parasite lives inside another organism and is known as an endoparasite. An external parasite lives on the body surface of the host and is known as an ectoparasite. Protozoa and helminths are examples of major human parasites.

Chapter 26, Problem 5S

Summary Introduction

To determine: The mass of virions in the Pacific Ocean.

Introduction: Viruses can be defined as acellular organisms that are obligate intracellular parasites. Viruses lack any cellular organelles but have only genetic material and protein-lipid core. These organisms cannot replicate by themselves, so they require a host cellular machinery to reproduce.

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a typical eukarytic cell has a diameter of 50 microns while a corona virus particles has a diameter of 100 nanometers. how many virus particles could be packed into the volum of the typical eurkaryotic cell? (assume the cell and the virus are spherical - V = 4/3 π R^3 and that the particles can use 100% of the space in the cell)

The SIR model of pandemics (such as COVID-19) considers three variables: S (those susceptible to the disease) I (those infected with the disease), and R (those recovered or removed from the illness). This model has a system of three differential equations, one for the derivative of each variable. We viewed the video entitled "The Coronavirus Curve - Numberphile," and we also rebuilt this model in Geogebra ourselves. That model includes two constants, "transm" and "recov:" use Ct instead of "transm," and use cr instead of "recov." In Geogebra, we could tweak these values. a. In this system, what is the equation for S'(t) = dS/dt? b. In this system, what is the equation for I'(t) = dI/dt? c. In this system, what is the equation for R'(t) = dR/dt? d. Who made this video?

Viruses are made up of the same biomolecules as cellular organisms (DNA, RNA, proteins, lipids, etc.). They infect cells and replicate themselves using resources from the host cells. Scientists discovered a previously unknown strain of virus in the tropical Pacific Ocean and it can infect higher-order eukaryotes. Initial analysis revealed that the virus is mainly composed of nucleic acids, proteins, and lipids. Chemical analysis after complete hydrolysis revealed the following building blocks (by weight): Chemical components Nucleosides Amino acids Lipids, phosphates, and carbohydrates Percentage by weight 20 30 50 Analysis of percentages of nucleosides yielded the following results (by molar ratio): Nucleosides A G T C U Percentage by mole 19 29 19 29 4 Researchers determined that the lipids found in the virus form a bilayer membrane surrounding the virus, and are obtained from the membrane of the host cell during virus maturation and exit from host cell. Further…

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Definition Definition Organism that lives in the body of another organism and obtains food at the expense of the host. A parasite can directly or indirect harm the host. There are two kinds of parasites: internal and external. An internal parasite lives inside another organism and is known as an endoparasite. An external parasite lives on the body surface of the host and is known as an ectoparasite. Protozoa and helminths are examples of major human parasites.

Chapter 26, Problem 5S

Summary Introduction

To determine: The mass of virions in the Pacific Ocean.

Introduction: Viruses can be defined as acellular organisms that are obligate intracellular parasites. Viruses lack any cellular organelles but have only genetic material and protein-lipid core. These organisms cannot replicate by themselves, so they require a host cellular machinery to reproduce.

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Answer 3

Question

Definition Definition Organism that lives in the body of another organism and obtains food at the expense of the host. A parasite can directly or indirect harm the host. There are two kinds of parasites: internal and external. An internal parasite lives inside another organism and is known as an endoparasite. An external parasite lives on the body surface of the host and is known as an ectoparasite. Protozoa and helminths are examples of major human parasites.

Chapter 26, Problem 5S

Summary Introduction

To determine: The mass of virions in the Pacific Ocean.

Introduction: Viruses can be defined as acellular organisms that are obligate intracellular parasites. Viruses lack any cellular organelles but have only genetic material and protein-lipid core. These organisms cannot replicate by themselves, so they require a host cellular machinery to reproduce.

Expert Solution & Answer

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Check out a sample textbook solution

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Answer 4

Question

Definition Definition Organism that lives in the body of another organism and obtains food at the expense of the host. A parasite can directly or indirect harm the host. There are two kinds of parasites: internal and external. An internal parasite lives inside another organism and is known as an endoparasite. An external parasite lives on the body surface of the host and is known as an ectoparasite. Protozoa and helminths are examples of major human parasites.

Chapter 26, Problem 5S

Summary Introduction