The characterization of prions demonstrated that:
A. this viruslike structure can cause disease.
B. secondary structure of a prion can cause disease.
C PrPC causes disease.
D. this viruslike structure and secondary structure of a prion can both cause disease.
E. secondary structure of a prion and PrPC both cause disease.
B
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To conduct a phylogenetic analysis, we need an outgroup to:
A. decide which characters are analogous and which are homologous. B. determine which character states are ancestral and which are derived. C. determine which characteristics to include in our analysis. D. decide which molecular data to use. E. All of the answer options are correct.
If the bacterial cells were viewed immediately after crystal violet was applied during the Gram stain procedure, gram-positive cells would be purple but gram-negative cells would be colorless.
Answer the following statement true (T) or false (F)
Mutations that completely abolish the function of a wild-type allele are
A) null mutations. B) hypomorphic mutations. C) hypermorphic mutations. D) conditional mutations. E) neomorphic mutations.
The term eukaryotic means ____
a. having many nuclei b. before the nucleus c. having a true nucleus d. not having a nucleus e. not having DNA