Which of the following is not a regulatory mechanism used to control the lactose operon in Escherichia coli?
A. Attenuation
B. Catabolite repression
C. Induction
D. All of the choices are correct.
Answer: A
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Answer the following statements true (T) or false (F)
1. The effects of a genetic mutation are always limited to simply a change in DNA sequence with little consequence on the proteins expressed. 2. The proteome, rather than genome, is most directly responsible for the structure, function, and appearance of organisms. 3. Little scientific evidence is necessary when formulating a theory. 4. The maintenance of cell structure requires energy. 5. Discovery-based science and hypothesis testing are the two major scientific approaches that help us understand biology.
Compare and contrast the blending and particulate models of heredity
What will be an ideal response?
In the experiment with peacock butterflies the working hypothesis is that ____
a. mimicry confuses both predator and prey b. mimicry protects butterflies from being eaten by predatory birds c. birds are capable of learning d. birds are agents of evolution e. unpalatable species display distinctive wings
Members of the genus Pseudomonas
A. are aerobes that mineralize a wide variety of organic compounds. B. form cysts when starved for nutrients. C. perform anaerobic photosynthesis. D. are obligate intracellular parasites.