Which of the Following Represents a Difference Between Viruses and Viroids

question 5

Multiple Choice

Which of the following represents a difference between viruses and viroids?

• A) Viruses infect many types of cells, whereas viroids infect only prokaryotic cells.
• B) Viruses have capsids composed of protein, whereas viroids have no capsids.
• C) Viruses contain introns, whereas viroids have only exons.
• D) Viruses always have genomes composed of DNA, whereas viroids always have genomes composed of RNA.
• E) Viruses cannot pass through plasmodesmata, whereas viroids can.

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Definitions:

Bird-like Hip

A type of pelvis structure found in some dinosaurs characterized by a forward-tilting pubis, similar to that of birds.

Mesozoic Era

A geological era that occurred between 252 and 66 million years ago, characterized by the dominance of dinosaurs.

Paleozoic

An era in the geologic time scale, occurring from about 541 million to 252 million years ago, noted for the early development of life on Earth.

Crinoids

Marine animals belonging to the class Crinoidea, characterized by a mouth on the top surface surrounded by feeding arms, part of the echinoderm phylum.