Two circular dna molecules are topoisomers of each other; they contain the same amount of dna. let’s call them dna-1 and dna-2. under the electron microscope, dna-1 appears more compact compared to dna-2. the level of gene transcription is much lower for dna-2. which of the following three possibilities would best explain these observations? a) dna-1 has 4 positive supercoils and dna-2 has 2 negative supercoils. b) dna-1 has 2 positive supercoils and dna-2 has 4 negative supercoils. c) dna-1 has 4 negative supercoils and dna-2 has 2 positive supercoils.
Answers: 3
Biology, 22.06.2019 07:00, cheyenneisaboss22
Which statement best describes how the loudness of the sound affects the high-pressure region created by the sound wave? a. a louder sound has no effect on the pressure created. b. a louder sound means a high-pressure region that is higher. c. a louder sound means a high-pressure region that is not as high.
Answers: 1
Biology, 22.06.2019 09:20, milhai0627a
Which type of respiration takes place when there is no oxygen present? a. anaerobic b. mitochondrial c. cellular d. aerobica. anaerobic
Answers: 2
Two circular dna molecules are topoisomers of each other; they contain the same amount of dna. let’...
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