41) The hydrocarbon tails of neighboring phospholipids within a lipid layer of a
ID: 213687 • Letter: 4
Question
41) The hydrocarbon tails of neighboring phospholipids within a lipid layer of a membrane interact A) hydrogen bonds B) Van der Waals C) Covalent bonds D) All of the Above E) A & B only 42) 42) "Encrgy is neither created nor destroyed", is a statement of A) the second law of thermodynamics C) entropy D) enthalpy 43) 43) Which of the following is an A) histidine B) hydrogen bromide D) E) adenosine tri 44) True or False?: Regarding osmosis, the amount of solvent (i.e. water) increases on the side of the 44) membrane with the greater concentration of solute. A) True B) False 45) True or False?: A channel protein could be used to actively transport an ion into a cell A) True B) False 46) In vitro experiments demonstrate that he xokinase can catalyze a reaction using various hexose sugars as its 46) substrate. Using fructose as a substrate, the Km for the reaction is 0.15 mM. When glucose is the substrate, the Km is 1.5 mM. As indicated by the Km, hexokinase has a affinity for glucose than fructose, suggesting that is the native substrate of hexokinase inside of a cell. A) greater, glucose C) greater; fructose B) lesser; fructose D) lesser, glucose 47) Phagosomes will fise with which subcellular structure inside the cel? B) peroxisomes C) lysosomes D) rough ER E) nucleusExplanation / Answer
Answer 41. E) A and B only.
The lipid bilayer is a noncovalent assembly. The proteins and lipid molecules are held together by noncovalent interactions such as Van der waals forces and hydrogen bonding.
Answer 42. E) the first law of thermodynamics.
The first law of thermodynamics, also known as Law of Conservation of Energy, states that energy can neither be created nor destroyed; energy can only be transferred or changed from one form to another.
Answer 43. D) phosphorylate.
Answer 44. True
A process by which molecules of a solvent tend to pass through a semipermeable membrane from a less concentrated solution into a more concentrated one.
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