Biology, 04.12.2019 03:31, dogskid1937
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:
1. phosphofructokinase (pfk) is an enzyme that functions in the cytoplasm during
glycolysis.
2. 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.)
options:
cytoplasm only, er --> cytoplasm, er --> golgi --> outside cell, cytoplasm --> er --> outside cell, golgi --> er --> outside cell, cytoplasm --> golgi --> outside cell, nucleus --> cytoplasm, er --> golgi --> cytoplasm
protein targeting pathway
pfk
insulin
Answers: 2
Biology, 22.06.2019 17:20, kcarstensen59070
If you were given a map of the sensory cortex in the postcentral gyrus of the cerebrum, do you think the map would have more “space” devoted to the regions of the body that have the highest density of sensory receptors, or the regions of the body that have the lowest density of sensory receptors? explain.
Answers: 2
Biology, 22.06.2019 22:00, lauralimon
Which of the following observations darwin shape his concept of descent with modification? a) species diversity declines farther from the equator. b) fewer species live on islands than on the nearest continents. c) birds can be found on islands located farther from the mainland than the birdsê¹ maximum nonstop flightdistance. d) south american temperate plants are more similar to the tropical plants of south america than to thetemperate plants of europe. e) earthquakes reshape life by causing mass extinctions.
Answers: 1
The dna in a cell's nucleus encodes proteins that are eventually targeted to every membrane and comp...
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