All of the following are true of prions and prion diseases, except
A. prion diseases are diagnosed by an indirect ELISA test that detects antibody to prions.
B. prions are composed exclusively of protein.
C. prions are not readily destroyed by routine sterilization methods.
D. prion diseases are all neurodegenerative diseases.
E. there are no medications that can halt the progression of prion diseases.
Answer: A
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Refer to the paragraph on Redi's experiments. What hypothesis was being tested in the initial experiment with open versus sealed jars?
A) Spontaneous generation is more likely during the long days of summer. B) The type of meat used affects the likelihood of spontaneous generation. C) Maggots do not arise spontaneously, but from eggs laid by adult flies. D) Spontaneous generation can occur only if meat is exposed to air.
Which of the following would describe the action of a chemical compound considered to be a mutagen?
A. Most are reactive and add bulky side groups to DNA bases. B. Most are able to bypass DNA repair mechanisms. C. Most are reactive and add bulky side groups to RNA bases. D. Most interfere with DNA replication. E. Most interfere with DNA transcription.
What structure best represents a polymer?
A. A fatty acid. B. A monosaccharide. C. A nucleotide. D. An amino acid. E. A protein.
Adjacent nucleotides on a strand of DNA are connected to each other by a(n) ____
a. hydrophobic interaction b. phosphodiester bond c. hydrogen bond d. peptide bond e. ionic bond