Description : Which of the following statements is incorrect? (a) Prions consist of abnormally folded proteins. (b) Viroids lack a protein coat. (c) Viruses are obligate parasites. (d) Infective constituent in viruses is the protein coat.
Last Answer : (d) Infective constituent in viruses is the protein coat.
Description : Which of the following are the causes of "mad cow disease"? a. Viriods b. Prions c. Virions d. A-C are correct
Last Answer : b. Prions
Description : _____ are infectious RNA particles a. Viroids b. Prions c. Virions d. A-C are correct
Last Answer : a. Viroids
Description : Viroids and prions differ in that viroids are believed to contain only ______, while prions are believed to contain only _______. a. carbohydrate; amino acids b. nucleic acid; protein c. amino acids; carbohydrate d. protein; nucleic acid
Last Answer : b. nucleic acid; protein
Description : Attenuated viruses are those that _____. a. can be used to treat viral disease. b. give rise to viroids and prions. c. multiply in cells but at a low rate. d. have been treated with chemicals such as formaldehyde.
Last Answer : c. multiply in cells but at a low rate.
Description : Which one of the following statements about prions is FALSE? a. Prions are infectious proteins. b. Prions have caused disease in Americans. c. Human disease is called variant CJD. d. Prions can be transmitted to humans from infected beef.
Last Answer : d. Prions can be transmitted to humans from infected beef.
Description : Ivanowsky, Beijerinck and Reed all began studies with particles smaller than the filters they were working with. This began the study of _____. a. measles b. viruses c. prions d. bacteria
Last Answer : b. viruses
Description : Vincent Zigas, a medical officer posted in Papua New Guinea, found several patients of the Fore tribe afflicted with uncontrollable trembling that was typically followed by neurological collapse and death. A ... won the Nobel for his work in 1976. What was the disease that Gajdusek studied?
Last Answer : Kuru.