Biology, 19.10.2019 03:30, smesarahmitchell
As a scientist, you seek to prove that dna is the hereditary macromolecule by replicating the hershey-chase experiment. you culture the lambda phage in heavy and light cl (cl-36 is heavy and radioactive - the most abundant is cl-35, lighter and non-radioactive). you purify the phage from their growth media and infect the e. coli, where will you detect radioactivity?
select one:
a. within the e. coli pellet as the dna has entered the bacterial cells.
b. on the e. coli cell surface (or phage fraction), as part of the phage protein coat.
c. in the supernatent (free liquid) of your test tube
d. both a and b
e. none of the above
why is the answer none of the above? why cant the radioactivity be detected?
Answers: 2
Biology, 22.06.2019 02:00, gabe3636
Which of the following describes a negative feedback loop? when the heart rate is too high, the body sends hormones that continually increase the heart rate higher. when a pregnant woman is in labor, the body sends hormones that increase the intensity of contractions, which then increases the secretion of the same hormones. when blood sugar is too low, the body sends hormones that raise blood sugar until it reaches a typical level and hormone secretion slows. when a person is jogging, the body sends hormones that continually decrease the rate of oxygen supply to the legs.
Answers: 1
Biology, 22.06.2019 02:30, brenyasanders5345
Many plants can reproduce asexually. which of these is an example of asexual reproduction in a plant? a. pine cones forming on a tree b. cross-pollination in a tomato c. roots sprouting from a potato d. night-blooming jasmine flowers
Answers: 3
As a scientist, you seek to prove that dna is the hereditary macromolecule by replicating the hershe...
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