Most Molecular Biologists Think That Viruses Originated from Fragments of Cellular

question 4

Multiple Choice

Most molecular biologists think that viruses originated from fragments of cellular nucleic acid. Which of the following observations supports this theory?

• A) Viruses contain either DNA or RNA.
• B) Viruses are enclosed in protein capsids rather than plasma membranes.
• C) Viruses can reproduce only inside host cells.
• D) Viruses can infect both prokaryotic and eukaryotic cells.
• E) Viral genomes are usually similar to the genome of the host cell.

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Definitions:

Emphysema

A chronic lung disease in which scar tissue and mucus obstruct the respiratory passages.

Bronchitis

Any inflammation of the bronchi.

Central Nervous

Refers to the central nervous system, which is comprised of the brain and spinal cord, controlling most functions of the body and mind.

Peripheral Nervous

The part of the nervous system that consists of the nerves and ganglia outside of the brain and spinal cord, responsible for connecting the central nervous system (CNS) to limbs and organs.