Comparing Viral Structures 1. Not all viruses are the same. Viruses can have different shapes, different proteins, and different types of genetic material. Based on the three viruses pictured, what structural characteristics do all viruses share? A. Head and tail B. DNA and a membrane envelope C. Membrane envelope and a capsid D. Genetic material and a capsid

Comparing Viral Structures 1. Not all viruses are the same. Viruses can have different shapes, different proteins, and different types of genetic material. Based on the three viruses pictured, what structural characteristics do all viruses share? A. Head and tail B. DNA and a membrane envelope C. Membrane envelope and a capsid D. Genetic material and a capsid

Biology Today and Tomorrow without Physiology (MindTap Course List)

5th Edition

ISBN:9781305117396

Author:Cecie Starr, Christine Evers, Lisa Starr

Publisher:Cecie Starr, Christine Evers, Lisa Starr

Chapter13: Early Life Forms And The Viruses

Section: Chapter Questions

Problem 3CT

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WRITE ABOUT A THEME: ORGANIZATION While virusesare considered by most scientists to be nonliving, they doshow some characteristics of life, including the correlationof structure and function. In a short essay (100–150 words),discuss how the structure of a virus correlates with its function.
Think about the cells that viruses infect. Pick out the correct statements below. A. The host cell has some particular thing - be it machinery, chemistry or whatever - that the virus MUST have in order to successfully reproduce. B. Viruse generally don't care what cells they infect. C. Viruses can only replicate in particular hosts and tissues. D. The host range or tissue specficity means the specific type of cells the virus infects. Example - rabies infects neural cells.
Students are debating about differences between viruses and cells. Which student’s argument is MOST correct using evidence from the diagrams? A. Diagram 1 represents a virus and Diagram 2 represents a cell because viruses do not have nucleic acids but cells do. B. Diagram 1 represents a cell and Diagram 2 represents a virus because a virus has nucleic acids and cells do not. C. Diagram 1 represents a cell and Diagram 2 represents a virus because viruses have a protein capsid while cells have a lipid membrane. D. Diagram 1 represents a virus and Diagram 2 represents a cell because cells have ribosomes to make their own proteins and viruses do not.
"Viruses without borders" is what it means? What's the reason that viral infections are going up as war, famine and disasters occur.
Viruses. all have a round shape cannot have a long shape do not maintain any shape vary in shape
Figure 21.5 Which of the following statements about virus structure is true? All viruses are encased in a viral membrane The capsomere is made up of small protein subunits called capsids. DNA is the genetic material in all viruses. Glycoproteins help the virus attach to the host cell.
Which statement is true? A virion contains DNA and RNA Viruses are acellular Viruses replicate outside of the cell Most viruses are easily visualized with a light microscope.
Figure 17.5 Which of the following statements about virus structure is true? a. All viruses are encased in a viral membrane. b. The capsomere is made up of small protein subunits called capsids. c. DNA is the genetic material in all viruses. d. Glycoproteins help the virus attach to the host cell.
Which statement is not true of viral replication? A lysogenic cycle kills the host cell There are six basic steps in the viral replication cycle Viral replication does not affect host cell function Newly released virions can infect adjacent cells.
The viral______play(s) a role in attaching a virion to the host cell. core capsid envelope both b and c
Which statement is true? a. A virion contains DNA and RNA. b. Viruses are acellular. c. Viruses replicate outside of the cell. d. Most viruses are easily visualized with a light microscope.
Viruses are not considered living because they ___________ . a. are not made of cells b. lack cell nuclei c. do not contain DNA or RNA d. cannot reproduce