Biology, 24.12.2019 19:31 Kuwillalean38
For a science fair project, two students decided to repeat the hershey and chase experiment, with modifications. they decided to label nitrogen of the dna, rather than the phosphate. they reasoned that each nucleotide has only one phosphate and two to five nitrogens. thus, labeling nitrogens would provide a stronger signal than labeling phosphate why won't this work?
a) there is no radioactive isotope of nitrogen
b) radioactive nitrogen has a half-life of 100,000 years, and the material would be too dangerous for too long
c) avery, maccloud and mccarty already did this
d) although their are more nitrogens in a nucletotide, labeled phosphates actually have 16 extra neutrons; t shift ctrl herefore, they are more radioactive
e) amino acids (and thus and proteins proteins) also have nitrogen atoms;
Answers: 3
Biology, 21.06.2019 22:10
Amouse that is homozygous for the dominant trait has the genotype . it has . a mouse that is homozygous for the recessive trait has the genotype . it has . image of fur color of mice
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Astudent reads the following text in a science book: scientific evidence tells us that the cause of earths four seasons is the tilt of earth as it revolves around the sound the student is instructed to illustrate this information in a science book. how will the student illustrate winter in the northern hemisphere? a.earths northern hemisphere will tilt away from the sun. b. earths northern hemisphere will tilt toward the sun. c.earths orbit will be farther away than from the sun d. earths southern hemisphere will tilt away from the sun.
Answers: 1
For a science fair project, two students decided to repeat the hershey and chase experiment, with mo...
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