BIOLOGICAL CLASSIFICATION
KINGDOM MONERA
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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All are parasites
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All of them have helical symmetry
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They have ability to synthesise nucleic acids and proteins
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Antibiotics have no effect on them
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Detailed explanation-1: -Rod shaped viruses possess helical symmetry and spherical shaped viruses possess icosahedral symmetry. So, all viruses don’t possess helical symmetry.
Detailed explanation-2: -Most viruses have icosahedral or helical capsid structure, although a few have complex virion architecture. 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.
Detailed explanation-3: -The most extensively studied helical virus is tobacco mosaic virus (Fig. 41-1). Many important structural features of this plant virus have been detected by x-ray diffraction studies.
Detailed explanation-4: -Complete answer: All viruses are obligate parasites, i.e., they lack metabolic machinery of their own to generate energy or to synthesize proteins, hence they depend on the host cells to carry out these vital functions.