Question

A segmented genome is one that has __________.a. more than one strand of nucleic acidb. double-stranded RNAc. both RNA and DNA strandsd. both +ssRNA and -ssRNA molecules

Accepted Answer

Understand the term 'segmented genome' in the context of virology and microbiology. A segmented genome refers to a viral genome that is divided into separate pieces or segments, rather than being a single continuous strand. Recall that these segments are typically separate strands of nucleic acid, which can be either RNA or DNA, depending on the virus, but the key feature is that the genome is split into multiple distinct segments. Analyze each option: (a) 'more than one strand of nucleic acid' aligns with the idea of multiple segments; (b) 'double-stranded RNA' describes a type of nucleic acid structure but does not necessarily imply segmentation; (c) 'both RNA and DNA strands' suggests mixed nucleic acid types, which is uncommon for a single virus genome; (d) 'both +ssRNA and -ssRNA molecules' refers to polarity of RNA strands, not segmentation. Conclude that the correct understanding of a segmented genome is that it consists of multiple separate strands of nucleic acid, which corresponds to option (a). Summarize that a segmented genome means the viral genome is divided into multiple distinct nucleic acid segments, which can be packaged within the same virus particle.

A segmented genome is one that has __________.

a. more than one strand of nucleic acid
b. double-stranded RNA
c. both RNA and DNA strands
d. both +ssRNA and -ssRNA molecules

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Concetti chiave

Segmented Genome

Nucleic Acid Strands in Viruses

Positive and Negative Sense RNA (+ssRNA and -ssRNA)