Question: Viroids are composed of only naked _____
Answer Choices: protein RNA DNA
Answer: RNA
Question: A virus-like particle that is dependent on other viruses for replication is called a _____
Answer Choices: viroid temperate virus satellite virus prion
Answer: satellite virus
Question: Which of the following diseases is caused by prions?
Answer Choices: mad cow disease pneumonia rheumatoid arthritis Rocky mountain spotted fever
Answer: mad cow disease
Question: Which of the following is completely composed of RNA?
Answer Choices: Prion Viroid Virus Bacterium
Answer: Viroid
Question: Most human viral infections are _____
Answer Choices: lethal self-limiting chronic for life
Answer: self-limiting
Question: Acquired CJD occurs when infectious agents called — are transmitted from cows to humans through consumption of contaminated meat.
Answer: prions
Question: This image shows animal cells growing in a Blank______ in a tissue culture dish.
Answer Choices: plaque bilayer bird embryo monolayer
Answer: monolayer
Question: What is the common name of bovine spongiform encephalopathy?
Answer Choices: Eastern equine encephalitis Bird flu Mad cow disease
Answer: Mad cow disease
Question: A noncellular infectious agent that depends on other viruses for replication is known as a(n) — virus.
Answer: satellite virus
Question: Prions are composed entirely of what type of molecule?
Answer Choices: lipid nucleic acid neither protein nor nucleic acid protein
Answer: protein
Question: A disease-causing agent composed of protein without including any nucleic acid is called a –.
Answer: prion
Question: Which of the following describes the “clear” area where a virus-infected cell lysed and infected all the neighboring cells and lysed those too?
Answer Choices: plaque syncytium pock
Answer: plaque
Question: Creutzfeldt-Jakob disease (CJD) afflicts the central nervous system of humans and is caused by a proteinaceous infective agent called a(n) –.
Answer: prion
Question: The rare form of CJD contracted by eating meat from an infected animal is called CJD.
Answer: variant CJD (vCJD)
Question: Which of the following best describes a prion?
Answer Choices: abnormal protein fibrils obligate aerobe RNA-based infectious agent obligate intracellular parasite
Answer: abnormal protein fibrils
Question: Plants are parasitized by virus-like agents composed of only naked strands of RNA that are called _____
Answer: viroids
Question: Which is not an effective strategy for addressing the propagation of viral infections?
Answer Choices: vaccines drugs that target viral protein activities antibiotic drugs
Answer: antibiotic drugs
Question: Besides viruses, two noncellular infectious agents known as _____ and viroids are medically important.Answer Choices: (No answer options provided)
Answer: prions
Question: Most viral infections do not result in death of the host organism.
Answer Choices: True False
Answer: True
Question: Some diseases of the nervous system result from an infectious agent in the form of protein fibrils that is called a Blank______.
Answer Choices: prion viroid virus bacteriophage
Answer: prion
Question: Antibiotics are an effective treatment for most viral infections.
Answer Choices: True False
Answer: False
Question: Which is the typical route of infection for mad cow disease?
Answer Choices: insect-borne: tick consumption of contaminated food insect-borne: mosquito bite from an infected animal
Answer: consumption of contaminated food
Question: Cultured cells grow in the form of a –, a single confluent sheet of cells that supports viral multiplication.
Answer: monolayer