Molecule A is rapidly consumed by cells. Membrane Protein A is a carrier protein that allows...
Molecule A is rapidly consumed by cells. Membrane Protein A is a
carrier protein that
allows molecule A to move across a cell membrane. How would
inhibiting the expression of the gene that codes for Membrane
Protein A affect intracellular and extracellular concentrations
of
molecule A?
Homework Answers
Carrier are integral membrane proteins which allow movement of polar and charged or polar and uncharged molecules across the plasma membrane. Since polar molecules are unable to move across the plasma membrane directly. They require carrier or channel proteins. In the above case as molecule is transported across protein A and if gene that express proteins A if inhibited then it movement of molecule A will be stopped and intracellularly molecule A will exausted as it is rapidally consumed but no more Molecules A is entering in cell. Extracellular concentration of molecule will increased.
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Molecule A is rapidly consumed by cells. Membrane Protein A is a
carrier protein that
allows...
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molecules to pass through.
-Channel proteins are classified as uniport, symport, or
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Answer all questions
Following graphs, the cellular response, as measured in real time by the concentration of a certain active effector protein, is plotted over time for five cell types (A to E) that are treated with three different concentrations of a signal molecule. During the time period indicated by the horizontal gray bar. the signal molecule is present in the culture media at a concentration of 1 nM (dotted curve), 5 nM (gray curve), or 25 nM (solid curve)....
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1. You are studying an integral plasma membrane protein named LINKER that can interact with the cytoskeletal molecule spectrin to form complex matrices across the surface of membranes. To begin to understand how the LINKER protein population responds to spectrin availability, you perform some fluorescence recovery after photobleaching (FRAP) experiments using a LINKER-GFP fusion protein. The results of a FRAP experiment with the wildtype version of LINKER in which 50% of the protein population is bound to spectrin is shown...
Part A What molecule would move through a biological membrane most rapidly by direct diffusion, and why? messenger RNA, because it is polar a deoxyribonucleotide, because it contains sugar units O carbon dioxide, because it is small and nonpolar O a large protein, because it can be embedded into the membrane Methionine, because it is an amino acid Submit Request Answer vide Feedback
Animals exploit the phospholipid asymmetry of their plasma membrane to distinguish between live cells and dead ones. When animal cells undergo a form of programmed cell death called apoptosis, phosphatidylserine-a phospholipid that is normally confined to the cytosolic monolayer of the plasma membrane-rapidly translocates to the extracellular, outer monolayer. The presence of phosphatidylserine on the cell surface serves as a signal that helps direct the rapid removal of the dead cell. How might a cell actively engineer this phospholipid redistribution?...
Which of the following statements correctly matches a membrane
protein with its function.
-Structural proteins bind to molecules to facilitate entry to
or exit from the cell.
-Carrier proteins form water-filled channels that allow
molecules to pass through.
-Channel proteins are classified as uniport, symport, or
antiport carriers.
-Receptors transmit signals from the extracellular environment
to the cytoplasm of the cell.
During the cephalic phase of gastric secretion,
-there is an increased flow of action potentials along the
vagus nerve...
22-25 and Essay
22. The epidermis a) is classified as pseudostratified columnar epithelium b) allows uncontrolled water loss from the body c) might include keratinocytes, melanocytes, Merkel cells and Langerhans cells d) All the above (a, b and c) are correct 23. Cartilage a) does not contain blood vessels b) is highly negatively charged because of sugars and sulfate groups attached to sugars e) absorbs large amounts of water which acts as a "shock absorber when pressure is applied to...
Answer all questions
Following graphs, the cellular response, as measured in real time by the concentration of a certain active effector protein, is plotted over time for five cell types (A to E) that are treated with three different concentrations of a signal molecule. During the time period indicated by the horizontal gray bar. the signal molecule is present in the culture media at a concentration of 1 nM (dotted curve), 5 nM (gray curve), or 25 nM (solid curve)....
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