Aresearcher is using a modified version of frap. she has devised a technique that allows her to label all the peripheral membrane proteins with a fluorescent tag, and has bleached a specific area of the cell membrane. after 24 hours, she notices that fluorescence has returned to the bleached area. what can she deduce from this experiment? a. peripheral membrane proteins are akin to integral membrane proteins. b. peripheral membrane proteins may not be permanently associated with the cell membrane. c. peripheral membrane proteins—like transmembrane proteins—are located within the cell membrane. d. peripheral membrane proteins can move freely within the cell membrane. e. peripheral membrane proteins can both move freely within the cell membrane and are akin to integral membrane proteins

The correct answer is option B.

Explanation:

FRAP or Fluorescence Recovery After Photobleaching refers to a method of finding the kinetics of diffusion in living cells, generally with the assistance of fluorescence microscopy. The method comprises the labeling of a particular cell constituent with a fluorescent molecule, imaging that cell, photobleach a small section of the cell, then image the recovery of fluorescence with time.  

In the given question, as the fluorescence has recovered back to the bleached region. The scientist can come to the conclusion that the membrane of the cell and the peripheral membrane proteins do not always belong together.  

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hey, i believe your answer would be d. sugar ribose and the base uracil. i believe this is the answer, because rna consists of sugar ribose, adenine, guanine, cytosine, and uracil.

your first option is incorrect, because that's dna. where it consists of sugar deoxyribose, adenine, guanine, cytosine and thymine.

your second option is also incorrect, this is because sugar deoxyribose is in dna, and uracil is in rna. these two do not make sense together.

your third option being incorrect, because sugar ribose is in rna, but not the base of thymine. rna consists of uracil, not thymine.

lastly your fourth option being correct! this answer is correct, because both sugar ribose, and the base uracil are in rna! ~

answer is d. sugar ribose and the base uracil.