Table of Contents
What is the difference between simple and complex viruses?
In simple viruses, the capsid consists of a number of copies of the same, or a few different proteins organized into a symmetric oligomer. Structurally complex viruses present a larger variety of components in their capsids than simple viruses.
What is a complex virus shape?
Complex. These virus structures have a combination of icosahedral and helical shape and may have a complex outer wall or head-tail morphology. The head-tail morphology structure is unique to viruses that only infect bacteria and are known as bacteriophages.
What does the shape of a virus mean?
Shapes of viruses are predominantly of two kinds: rods, or filaments, so called because of the linear array of the nucleic acid and the protein subunits; and spheres, which are actually 20-sided (icosahedral) polygons. Most plant viruses are small and are either filaments or polygons, as are many bacterial viruses.
What are the complex viruses?
Poxviruses, geminiviruses, and many bacteriophages are examples of viruses with complex structure (Fig. 2.10 ). Poxviruses, including the viruses that cause smallpox or cowpox, are large oval or brick-shaped particles 200–400 nm long.
What are the different shapes of viruses?
Viruses are classified into four groups based on shape: filamentous, isometric (or icosahedral), enveloped, and head and tail. Many viruses attach to their host cells to facilitate penetration of the cell membrane, allowing their replication inside the cell.
What are the three shapes of viruses?
Viruses may also be classified according to the structure of the virus particle, or virion. The three major shapes seen are spherical, filamentous, and complex.
What are some shapes of viruses?
The different virus shapes include helical or cylindrical, polyhedral (icosahedral and prolate), spherical, and complex shapes. The geometric symmetry of the capsid contributes to the structure and stability of the virus.
Which of the following viruses have complex symmetry?
Which of the following viruses have a complex symmetry? Explanation: Orthopoxvirus posseses a complex symmetry and is surrounded by a coat. It consists of DNA as its nucleic acid.
What are the different types of viruses based on their shape?
Viruses form different shapes based on the structure of its protein capsid. They have helical, icosahedral, prolate and other complex shapes.
What are the main shapes of viruses?
In general, the shapes of viruses are classified into four groups: filamentous, isometric (or icosahedral), enveloped, and head and tail.
What is the salient structural feature of complex viruses?
Complex – These viruses possess a capsid that is neither purely helical nor purely icosahedral, and that may possess extra structures such as protein tails or a complex outer wall.
Which of the following as a complex symmetry?
Which of the following has a complex symmetry? Sol: (a) T4 phage.
What are the three main shapes of viruses?
What is the function of the structural elements of a virus?
What is the function of the structural elements of a virus? To package and protect the viral genome.
Which type virus has complex symmetry?
Examples of complex symmetry viruses are bacteriophages, poxviruses, etc.
What are different shapes of viruses?
Viruses are classified into four groups based on shape: filamentous, isometric (or icosahedral), enveloped, and head and tail.
What is the shape and structure of a virus?
Q.1. What is the shape and structure of a virus? Ans: The shape of the virus varies due to the structure of its capsid. The capsid can be filamentous or rod-shaped, isometric or icosahedral, spherical or complex with an icosahedral head and helical tail.
What is the shape of viral capsid?
Helical, Icosahedral and Prolate Viral Shapes. This is a virus that has its capsid shaped into a filamentous, or rod-shaped structure. This type of shape has a central cavity that encloses its nucleic acid. Some of these viruses are short, like a two-door car, while others are very long, like an 18-wheeler.
Which is the most complicated virus in terms of structure?
Bacteriophage is known to be the most complicated virus in terms of structure. It possesses an icosahedral head and helical tail. Such a structure is called binal symmetry. 1. Bacteriophage is the virus that infects bacteria, these are of different types. 2. Some of these contain DNA and some have RNA as genetic material. 3.
What is the shape of icosahedral virus?
An icosahedron is a geometric shape with 20 sides, each composed of an equilateral triangle, and icosahedral viruses increase the number of structural units in each face to expand capsid size.