Accumulation of a metabolic pathway product may result in decreased activity of the pathway enzymes
Indicate whether the statement is true or false
TRUE
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The respiratory pigment you would find in a blue crab or octopus is
A. hemocyanin. B. hemoglobin. C. hemophilin. D. ferritin. E. calmodulin.
Which one of the following examples describes a communication mode that would be best for signaling over the greatest distance in a dark, densely forested environment?
A. display of plumage of a male bird to attract females B. waggle dance of a honeybee in a colony within the forest C. pheromones released by a female moth D. territorial song of a male bird to repel other males E. flashing of a male firefly to attract conspecific females 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 different modes of communication? 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?
The procedure in which a single stain is used to visualize microorganisms is called ________ staining.
Fill in the blank(s) with the appropriate word(s).
Which of the following statements about restriction nucleases is false?
(a) A reproducible set of DNA fragments will be produced every time a restriction nuclease digests a known piece of DNA. (b) Restriction nucleases recognize specific sequences on single-stranded DNA. (c) Some bacteria use restriction nucleases as protection from foreign DNA. (d) Some restriction nucleases cut in a staggered fashion, leaving short, single-stranded regions of DNA at the ends of the cut molecule.