Prions consist of proteins and have no apparent nucleic acid genome.
Answer the following statement true (T) or false (F)
True
You might also like to view...
Whose discovery of streptomycin stimulated an intense search for other antibiotics?
A. Waksman B. Pasteur C. Fleming D. Ehrlich
Molecules and ions reabsorbed from the nephron reenter the blood at the
a. efferent arteriole. b. peritubular capillaries. c. renal artery. d. afferent arteriole. e. glomerulus.
Which factor allows bacteria species to adapt to environmental changes faster than fish?
A. shorter generation time B. smaller size C. smaller nutrient needs D. lack of a nuclear membrane Clarify question: What is the key concept addressed by the question? What type of thinking is required? Gather Content: What do you already know about the characteristics of bacteria that might allow them to respond to changes in their environment? What other information is related to the question? Choose Answer: Given what you now know, what information is most likely to produce the correct answer? Reflection 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?
If the mutation rate of individual genes is taken to be about one in 100,000 genes per cell cycle across many organisms, we might expect evolution to proceed at a consistent rate for various forms of life. Which factor could make the accumulation of gene mutations faster or slower among different organisms?
A. Organisms with more genes will likely have more mutations per generation. B. Organisms vary in the percent of loci that have multiple alleles. C. Some organisms may be more effective at repairing mutations before they are passed on to the next generation. D. More selection of mutations can occur in a shorter period of time for bacteria that replicate each twenty minutes than for humans with a (roughly) 20-year generation span. E. All of the choices are correct.