Which of the following statements regarding the use of genetically modified foods in the United States is INCORRECT?
A) Bt crops are not intended for human consumption.
B) All GM foods for consumer use must be labeled as such.
C) Not all GM crops involve transgenic plants.
D) DNA tests can be used to identify many GM plants.
E) All of these choices are correct.
B
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In yeast signal transduction, the yeast cells
A) must physically and directly interact. B) produce signal molecules that change themselves so they can interact with one another. C) produce response molecules that diffuse to other yeast cells. D) secrete molecules that result in response by other yeast cells. E) mate, after which the new cells secrete hybrid signals.
Which of the following is a nitrogen-fixing bacterium that forms associations with the roots of plants?
A. anaerobic Bacillus species B. Clostridium species C. Rhizobium species D. Azotobacter species E. cyanobacteria
Beechdrops is a parasitic plant that cannot perform photosynthesis but relies on its host the Beech tree. However, Beechdrops still retains many if not all of the genes for photosynthesis
Snapdragons and gladiolas are common garden flowers that rely on their ability to perform photosynthesis. If you were to compare the gene sequences for these three plants for ribulose-1,5-bisphosphate carboxylase/oxygenase (RuBisCO) a protein necessary for photosynthesis what would you predict? A. The differences between gladiolas and snapdragons would most likely be silent mutations while those in beechdrops may be silent or missense B. Since these three plants are not highly related the sequences for RuBisCO would be very different between them C. The differences between gladiolas and snapdragons would most likely be in the second nucleotide of codons while beechdrops would have a higher number of mutations in the third nucleotide of the diffferent codons D. The differences between gladiolas and snapdragons would most likely be missense mutations while those in beechdrops may be silent or missense
________ animals have been genetically engineered so that a specific gene is disrupted and rendered nonfunctional
A) Knockout B) Transgenic C) Polyploid D) Selectively bred E) Cloned