Biology, 25.01.2020 02:31 cuzhernamesari
Since watson and crick described dna in 1953, which of the following might best explain why the function of small rnas is still being explained?
a. as rnas have evolved since that time, they have taken on new functions.
b. watson and crick described dna but did not predict any function for rna.
c. the functions of small rnas could not be approached until the entire human genome was sequenced.
d. ethical considerations prevented scientists from exploring this material until recently.
e. changes in technology, as well as our ability to determine how much of the dna is expressed, have now made this possible.
Answers: 2
Biology, 21.06.2019 20:50, witchhunt666
Dna has unique properties that allow it to accurately retain genetic information, even after multiple rounds of replication. one aspect of dna that allows it to accurately store genetic information is the base pairing from chargaff\'s first rule of the four nucleotide bases. if the c content of a dna molecule is 22%, what are the percentages of the remaining bases?
Answers: 1
Biology, 21.06.2019 23:00, hannahkharel2
The dna in a cell’s nucleus encodes proteins that are eventually targeted to every membrane and compartment in the cell, as well as proteins that are targeted for secretion from the cell. for example, consider these two proteins: phosphofructokinase (pfk) is an enzyme that functions in the cytoplasm during glycolysis. insulin, a protein that regulates blood sugar levels, is secreted from specialized pancreatic cells. assume that you can track the cellular locations of these two proteins from the time that translation is complete until the proteins reach their final destinations. for each protein, identify its targeting pathway: the sequence of cellular locations in which the protein is found from when translation is complete until it reaches its final (functional) destination. (note that if an organelle is listed in a pathway, the location implied is inside the organelle, not in the membrane that surrounds the organelle.)
Answers: 3
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