Spongiform encephalopathies are thought to be caused by
A) RNA viruses.
B) DNA viruses.
C) prions.
D) enveloped viruses.
Ans: C) prions.
You might also like to view...
The table shows the distribution of traits (A-E) in six extant species (1-6). A "0" indicates the ancestral condition, and a "1" indicates the derived condition. Which species has the greatest number of ancestral character states (pleisiomorphies)?
A. 1
B. 2
C. 3
D. 4
E. 5
F. 6
Clarify Question
· What is the key concept addressed by the question?
· What type of thinking is required?
· What key words does the question contain and what do they mean?
Gather Content
· What do you already know about cladistics?
Consider Possibilities
· What other information is related to the question? Which information is most useful?
Choose Answer
· Given what you now know, what information and/or problem solving approach is most likely to produce the correct answer?
Reflect on Process · Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
Which of the following is not a component of a polymerase chain reaction (PCR)?
A. dNTPs B. DNA containing the sequences to be amplified C. primers complementary to each end of the sequence to be amplified D. heat stable Taq polymerase E. DNA ligase to connect the fragments together
Define the term "evaporite"
What will be an ideal response?
Each of the following is a category into which proteins encoded by oncogenes fit except
A) growth factors. B) signal receptors. C) plasma membrane-associated GTP-binding proteins. D) cell cycle regulators. E) P450 cytochromes.