Virus Characteristics

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Questions and Answers

What is the primary component found in the core of a virus?

RNA and DNA
DNA or RNA (correct)
Lipids
Protein

Viruses can reproduce independently without the host cell.

False (B)

What structures do viruses lack that are found in cellular organisms?

Nucleus, cytoplasm, mitochondria, or ribosomes

Viruses are classified as __________ intracellular parasites.

<p>obligate</p> Signup and view all the answers

Match the following terms with their descriptions:

<p>Envelope = An outer lipoprotein membrane of some viruses Progeny viruses = Hundreds of new viruses produced from one virus Electron microscope = Tool to view viruses Binary fission = A method of reproduction not used by viruses</p> Signup and view all the answers

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Study Notes

Virus Characteristics

Viruses are microscopic organisms, requiring an electron microscope for observation.
Viruses are composed of a core containing either DNA or RNA surrounded by a protein coat.
Some viruses possess an outer lipoprotein membrane, known as an envelope.
Viruses lack organelles such as a nucleus, cytoplasm, mitochondria, and ribosomes.
Viruses are incapable of generating energy or synthesizing their own proteins, requiring host cells for replication.
Viruses are obligate intracellular parasites, meaning they can only reproduce within living cells.
Viruses do not engage in binary fission or mitosis as a method of replication.
A single virus can produce hundreds of progeny viruses, while a cell only divides to produce two daughter cells.