As a tissue, blood is composed of only one type of cell
a. True
b. False
b
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An organism has been found to contain a defective form of photolyase. What function might be impaired in this organism?
A. Lengthening of the tips of chromosomes B. Repair of DNA damage caused by UV light C. Stabilization of single-stranded DNA during DNA replication D. Recognition of damaged DNA by the UvrABC complex Clarify Question · What is the key concept addressed by the question? · What type of thinking is required? · What key words does the question contain? Gather Content · What do you already know about photolyase? Consider Possibilities · Consider the different answer options. Which can you rule out? 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 describes the Lac operon in E. coli when lactose, but not glucose, is present in the culture medium?
A. CAP and the Lac repressor are both bound to the Lac operon's regulatory DNA, and the Lac operon is not expressed. B. Neither CAP nor the Lac repressor is bound to the Lac operon's regulatory DNA, and the Lac operon is expressed. C. Neither CAP nor the Lac repressor is bound to the Lac operon's regulatory DNA, and the Lac operon is not expressed. D. CAP, but not the Lac repressor, is bound to the Lac operon's regulatory DNA, and the Lac operon is expressed. E. The Lac repressor, but not CAP, is bound to the Lac operon's regulatory DNA, and the Lac operon is not expressed.
The most important role of pigments in photosynthesis is to __________.
Fill in the blank(s) with the appropriate word(s).
Which is not associated with tularemia?
A. listed as a pathogen of concern on the lists of bioterrorism agents B. transmitted by arthropod vectors C. reservoir can be rabbits and squirrels D. symptoms include fever, swollen lymph nodes, ulcerative lesions, conjunctivitis, and pneumonia E. in animals, infects the placenta and fetus