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Biological membranes are selectively permeable, allowing certain molecules to cross the membrane, but not others. Classify...
Transport antibiotics generally make membranes particularly permeable to certain charged particles. There are several types of transport antibiotics including carriers and channel-forming antibiotics. The conductance (permeability) of a biological membrane containing a carrier antibiotic decreases abruptly when the temperature is lowered from 37oC to 25oC. In contrast, there is little change in conductance in the same membrane when it contains a channel-forming antibiotic. Why? (HINT: Carrier antibiotics shuttle ions from one side of the membrane to another and rely on...
1 Label the following diagram Molecules cross cell membranes by by passive transport |(a) Active may be moving down moving against requires (b) ATP uses diffusion (d) uses (e) of of (c) polar molecules and ions 2- List the five properties/characteristics of enzymes:
Choose the item in column 2 that best matches each item in column 1. You may use a column 2 item more than once. A requires direct ATP hydrolysis CO2, O2, H20 driven by an ion gradient - A active transport and indirect active transport transports glucose across membranes Bindirect active transport B. Na glucose symport facilitated diffusion (passive transport) Na */ ATPase pump D, active transport F. transports small, nonpolar molecules facilitated diffusion and active transport A F. simple...
what about the nucleosides? how could it cross the membrane? Q6: How would you expect nucleosides and steroids to cross the plasma membrane? And what are the requirements for compounds to pass through the membrane [20% Points] plasma * The el membrane is Selectively permeable; hydrophobic molecules and Small polar molecules can diffuse through the lipid Layer, but ions and Larg polar molecules Cannot. Integral membrane proteins enable ians and lary polar molecules to pass through by passive or active...
Part A - Concept map: movement across membranes Complete the Concept Map to relate plasma membrane structure to active and passive transport processes. Drag the appropriate labels to their respective targets. View Available Hint(s) Reset Help acine transport diffusion membrane transport mechanism endocytosis vesicular transport osmosis facilitated diffusion exocytosis that engulfs any type of extracelular materials Via membranous sacs is that experts packaged materials is that uses ATP to Dump solutosis of water is that passive moves substances down ther...
Selectively permeable membranes allow A.ANY substance to enter but nothing can leave B.ANY substance to leave but nothing can enter C.some substances to move in/out and others are prohibited from entering/leaving D.nothing to enter or leave Plasma membranes are made ONLY of a bilayer of phospholipid molecules with no other moecules embedded in it or attached to it. true or false Each substance diffuses along its own concentration gradient. true or false Active transport requires an input of energy true...
FILL THE BLANK The membranes of fishes that live in extreme cold have a high proportion of _________________ hydrocarbon tails, enabling them to stay fluid.For example, cold-adapted organisms such as winter wheat increase the percentage of _________________ phospholipids in their membranes in the autumn to prevent the membranes from solidifying during winter.There are two major populations of membrane proteins: ___________ and _____________.Integral proteins penetrate the hydrophobic interior of the lipid bilayer, usually completely spanning the membrane as ________________ proteins.________________ proteins...
Questions 19-22, Match the following substances with the mechanisms of transport across membrane into a cell (May use an answer more than once, but the cel response). each has only 1 correct 19. Chloride lon 20. Steroid Hormones 21. Amino Acids 22. Glucose (A) Simple Diffusion (B) Facilitated Diffusion (C) Osmosis (D) Primary Active Transport Questions 23-25 Answer the following questions using the key (A)Isotonic (B) Hypertonic (C) Hypotonic (D) ALL (E) NONE 23. In which solution is the solute...
During the aerobic metabolism of glucose, glucose is ____________. Reduced to form water Oxidized to form water Reduced to form CO2 Oxidized to form CO2 Which of the following describes the equation: FAD + XH2 à FADH2 + X. FAD is reduced to FADH2 It is a coupled reduction – oxidation reaction XH2 is oxidized to X All of the above Which of the following is FALSE about glycolysis? The initial steps of glycolysis requires energy derived from the splitting...
here would you expect to find a bedrophhobic amino acld like valine? hor of the folded protein, away from water on the exterior surface of the protein, interacting with water C) in the interior of the folded protein, away from water, or in a tranomembrane portion interacting with lipid fatty acid chains D) in the transmembrane portion interacting with lipid fatty acid chains- 20) Which of the following are found in plant, animal, and bacterial cells? A) chloroplasts C) ribosomes...