In the cell membrane, a bilayer exist whereinhydrophobic ends occupy the outside layer of the micelleO phospholipid hydrocarbon chains (tails) face each otherions freely move in and out of the membrane regardless of concentration gradientdiffusion is the only mechanism in which nutrients can go in and out of the cellEnzymes are important becausethey make biochemical reactions possiblethey are insoluble in aqueous solutionthey produce more substrates that are needed in the bodythey block inhibitorsPenicillin works as an antibiotic byA. inducing allosteric inhibition in lipasesB. lowering the energy of activation of reactantsC. attacking the double bond present in saturated fatsD. inhibiting the enzyme that forms cell walls of bacteriaO OO O OO O O Sickle cell anemia is caused bytoo much consumption of disaccharides and monosaccharidesa change in a single amino acid in the peptide sequencereaction of lipase to the blood cell, causing disruption in the blood flowa virus similar to coronavirus that have a protein similar to Sars-Cov2Since cholesterol is a lipid, that would make it insoluble in blood. There is acorrelation between high blood pressure and this molecule sinceit clogs arteries and at high levels form plaqueblood pressure becomes low from the IMF between these substanceslipids are mostly hydrophilic, causing denaturation in the protein in bloodthe "good" and "bad" cholesterol are interchangeable and has a high pH

Ans-1 In cell membrane lipid bilayer exists wherein phospholipids hydrocarbon chain face (tails)…

Answered: Sickle cell anemia is caused by too…

BIOLOGY:CONCEPTS+APPL.(LOOSELEAF)

10th Edition

ISBN:9781305967359

Author:STARR

Publisher:STARR

Chapter5: Ground Rules Of Metabolism

Section: Chapter Questions

Problem 8SA

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Proteoglycan aggregates in tissues form hydrated, viscousgels. Can you think of any obvious mechanical reason whytheir capacity to form gels is important to cell function?[Hint: Liquid water is virtually incompressible.]
Both H+ and Ca2+ are ions that move through thecytosol. Why is the movement of H+ ions so much fasterthan that of Ca2+ ions? How do you suppose the speed ofthese two ions would be affected by freezing the solution?Would you expect them to move faster or slower? Explainyour answer.
Which of the following statements are acceptable and why? [Whereas all the carbohydrate in the plasma membrane faces outward on the external surface of the cell, all the carbohydrate on internal membranes faces toward the cytosol.] [Although lipid molecules are free to diffuse in the plane of the bilayer, they cannot flip-flop across the bilayer unless enzyme catalysts called phospholipid translocators are present in the membrane.]
The interface formed between two hydrophobic molecules in the context of the aqueous environment of the cell cytoplasm is formed mostly through: A. Hydrogen bonds B. Covalent bonds C. Van der Waals interactions D. Ionic bonds E. None of the above
The acroonym 'OIL RIG' in reference to redox reactioons is ment to remind us that; a) Oligomers Induce Ligases, Reactants Induce Glycolysis b) Organized in Lipids, Reacted in Golgi apparatus c) Oxidation Is Loss of electrons, Reduction Is gain of electrons
Ammonia (NH3) is a weak base that under acidic conditions becomes protonated to the ammonium ion in the following reaction: NH3 + H+ → NH+4 NH3 freely permeates biological membranes, including those of lysosomes. The lysosome is a subcellular organelle with a pH of about 4.5–5.0; the pH of cytoplasm is about 7.0. What is the effect on the pH of the fluid content of lyso- somes when cells are exposed to ammonia? Note: Ammo- nium (NH4+) does not diffuse freely across membranes.
Hydrogen peroxide (H2O2) is naturally formed in living organisms, however it is very harmful and is broken down immediately by catalase into water and oxygen. This reaction occurs in the peroxisome, an organelle present in both plant and animal cells. Design an experiment to determine which of the following three food samples contains the highest concentration of catalase: dried potato, ground meat, and fresh ground leaves
In order to investigate the action of a bacterial membrane protein that is a light-driven proton pump, you purify the protein and assemble it together with phospholipids into liposomes that contain an indicator dye, which is blue at high pH, colorless at neutral pH, and red at low pH. You then expose the liposomes, in an aqueous solution, to sunlight. The interior of the liposomes turn blue. Further investigatin of the proton pump protein you find that treatment of either intact bacteria or the purified protein with the protease chymotrypsin result in cleavage of the protein at a single site near the amino terminus, which destroys its capacity to pump protons. When you treat the liposomes described above with chymotrypsin, the interior of the liposomes remains colorless. From these results create a diagram of that illustrates the orientation of the pump protein in the plasma membrane of the intact bacterium and the direction in which it pumps protons. Explain your reasoning.
In order to investigate the action of a bacterial membrane protein that is a light-driven proton pump, you purify the protein and assemble it together with phospholipids into liposomes that contain an indicator dye, which is blue at high pH, colorless at neutral pH, and red at low pH. You then expose the liposomes, in an aqueous solution, to sunlight. The interior of the liposomes turn blue. Further investigatin of the proton pump protein you find that treatment of either intact bacteria or the purified protein with the protease chymotrypsin result in cleavage of the protein at a single site near the amino terminus, which destroys its capacity to pump protons. When you treat the liposomes described above with chymotrypsin, the interior of the liposomes remains colorless. Create an illustration/ diagram of that illustrates the orientation of the pump protein in the plasma membrane of the intact bacterium and the direction in which it pumps protons.
Which of the following fatty acids would be likely to increase in concentration in the membrane of a bacterial cell switched from growth at 37ºC to growth at 15ºC? a. stearic acid b. oleic acid c. arachidic acid d. palmitoleic acid e. palmitic acid
The active site of an enzyme ___. is where the coenzyme is located is a specific bulge or protuberance on an enzyme is a groove or crevice in the structure of the enzyme complementary to the substrate will react with only one substrate no matter how many molecules may resemble the shape of the substrate rigidly resists any alteration of its shape
Which of the following factors does NOT help cells survive and grow well in an AEROBIC environment? a) Superoxide Dismutase b) Catalase c) Peroxidase d) Hydroxyl radicals e) Thioglycolate

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