Biology, 17.10.2019 23:10, dvandebrake2002
Which of the following is true regarding membrane proteins?
a. all peripheral membrane proteins contact the lipid bilayer by covalent attachment to the hydrophilic head groups on membrane lipids
b. beta strands can assemble into a membrane-spanning barrel structure.
c. lipid-anchored membrane proteins always face the cell exterior.
d. a protein with six hydrophobic helices is most likely a lipid-anchored membrane protein .
Answers: 2
Biology, 22.06.2019 09:30, ceeejay0621
Juan and carol were studying invertebrates in biology. they knew that segmented or earth worms preferred a dark, moist habitat. during this lab, they would be investigating the responses of organisms called planaria or dugesia tigrina. these were simple flatworms that still had a one-way digestive system and a very simple nervous system. juan and carol placed the planaria in a petri dish containing cool, distilled water that was partially covered with black paper. they shined a light on the dish. next, they removed the paper and placed a small amount of chicken liver at one end of the dish. they added a few large salt crystals to the water. finally, they added drops of hot water to the cool water in the petri dish. their results can be seen in the data table. according to their experiment, all but one conclusion is valid.
Answers: 1
Biology, 22.06.2019 10:30, jagslovegirl
Natural selection changes allele frequencies because some survive and reproduce more successfully than others.
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Biology, 22.06.2019 11:00, braxtengames
Which measure of an earthquake depends on how close you are to the focus?
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Which of the following is true regarding membrane proteins?
a. all peripheral membrane prote...
a. all peripheral membrane prote...
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