Which of the following represents a difference between viruses and viroids? Viruses infect many types of cells whereas viroids infect only prokaryotic cells. Viruses have capsids composed of protein, whereas viroids have no capsids. Viruses contain introns; viroids have only exons. Viruses always have genomes composed of DNA, whereas viroids always have genomes composed of RNA. Viruses cannot pass through plasmodesmata, viroids can. What is the primary role of prokaryotes? parasitizing eukaryotes, thus causing diseases. breaking down organic matter. metabolizing materials in extreme environments. adding methane to the atmosphere. serving as primary producers in terrestrial environments. SARS is associated with what form of virus? Hantavirus. Filovirus. Coronavirus. Influenza Adenovirus An infectious material is isolated from a nerve cell. It contains protein with Amino acid sequences identical to the host protein but no nucleic acids. It belongs to the group Archaea. Prions Toxin producers Viroids Sporoformers Solution 47) B)Viruses have capsids composed of proteins while viroids don\'t have this protein coat or capsid. Both viruses and viroids can infect many cells, Viruses have exons, genome of viruses are composed of DNA and Rna both. 48) B) Primary role of prokaryotes is breaking down organic matter. Prokaryotes like bacteria and cyanobacteria, break down the complex organic matter to utilize energy from them into smaller particles. 49) C SARS is associated with coronavirus. Coronaviruses primarily infect the upper respiratory and gastrointestinal tract in birds and mammals. 50) B Prions.Prions are infectious agents having only proteins but no nucleic acid and can cause neurodegenerative diseases in mammals.

1. Which of the following represents a difference between viruses and viroids? Viruses infect
many types of cells whereas viroids infect only prokaryotic cells. Viruses have capsids
composed of protein, whereas viroids have no capsids. Viruses contain introns; viroids have
only exons. Viruses always have genomes composed of DNA, whereas viroids always have
genomes composed of RNA. Viruses cannot pass through plasmodesmata, viroids can. What is
the primary role of prokaryotes? parasitizing eukaryotes, thus causing diseases. breaking down
organic matter. metabolizing materials in extreme environments. adding methane to the
atmosphere. serving as primary producers in terrestrial environments. SARS is associated with
what form of virus? Hantavirus. Filovirus. Coronavirus. Influenza Adenovirus An infectious
material is isolated from a nerve cell. It contains protein with Amino acid sequences identical to
the host protein but no nucleic acids. It belongs to the group Archaea. Prions Toxin producers
Viroids Sporoformers
Solution
47) B)Viruses have capsids composed of proteins while viroids don't have this protein coat or
capsid.
Both viruses and viroids can infect many cells, Viruses have exons, genome of viruses are
composed of DNA and Rna both.
48) B) Primary role of prokaryotes is breaking down organic matter. Prokaryotes like bacteria
and cyanobacteria, break down the complex organic matter to utilize energy from them into
smaller particles.
49) C SARS is associated with coronavirus. Coronaviruses primarily infect the upper respiratory
and gastrointestinal tract in birds and mammals.
50) B Prions.Prions are infectious agents having only proteins but no nucleic acid and can cause
neurodegenerative diseases in mammals