BSE or 'Mad Cow Disease' are probably caused by Prions. Prions may be classified as:

A. Protozoa
B. Viruses
C. Genetic material particles (DNA)
D. Bacteria
E. Proteinaceous material


Ans: E. Proteinaceous material

Biology & Microbiology

You might also like to view...

Positive and negative transcriptional regulation differ in that:

A. positive regulation requires that a promoter be present; it's not necessary in negative regulation. B. in positive regulation, the binding of a regulatory protein to the DNA is necessary for transcription to occur; in negative regulation, no such protein is necessary. C. in positive regulation, the binding of a regulatory protein to the DNA is necessary for transcription to occur; in negative regulation, such binding prevents transcription. D. in positive regulation, the absence of a regulatory protein promotes transcription; in negative regulation, the absence of a regulatory protein promotes transcription. E. None of these choices is correct.

Biology & Microbiology

Antibodies

A. can target the immunogen for destruction. B. can bind to an immunogen. C. are part of the nonspecific immune response. D. both can bind to an immunogen and can target the immunogen for destruction. E. both can bind to an immunogen and are part of the nonspecific immune response.

Biology & Microbiology

Which of the following deliver oxygen-poor

blood to the right atrium?

a. vena cavae b. pulmonary artery c. pulmonary vein d. aorta e. left atrium

Biology & Microbiology

Strolling in the Sonoran Desert, you come upon a stately Saguaro cactus. The large central "trunks" of this cactus are covered with numerous smaller spines

The central stalks are modified _________ used for water storage and spines are modified ______ used for protection. A) stems; leaves B) leaves; leaves C) petioles; leaf blades D) leaf blades; trichomes E) stems; fruits

Biology & Microbiology