C) enables the animal to add hydrogen atoms to unsaturated phospholipids. D) mak
ID: 302775 • Letter: C
Question
C) enables the animal to add hydrogen atoms to unsaturated phospholipids. D) makes the membrane less flexible, allowing it to sustain greater pressure from within the cell. E) makes the acimal more sasceptible to circulatory disorders 22) In order for a protein to be an integral membrane protein i would have to be A) hydrophilic. B) hydrophobic Camphipathic, with at least one hydrophobic region Di completely covered with phospholipids E) exposed on only one surface of the membrane 23) The primary function of polysaccharides attached to the glycoproteins and glycolipids of animal cell membranes is AJ to facilitate diffusion of molecules down their concentration gradients B) to actively transport molecules against their concentration gradients. C) to maintain the integrity of a fluid mosaic membrane. D) to maintain membrane fluidity at low temperatures. ?ro, mediate cell-to-cell recognition 24) What kinds of molecules pass through a cell membrane most casily? A) large and hydrophobic Bf small and hydrophobic C) large polar D) ionic E) monosaccharides such as glucose 25) Which of the following statements is correct about diffusion A) It is very rapid over long distances B) It requires an expenditure of energy by the cell. el is a passive process in which molecules move from a region of higher concentration to a region of lower concentration. D) It is an active process in which molecules move from a region of lower concentration to one of higher concentration. B) It requires integral proteins in the cell membrandExplanation / Answer
22) option C. plasma membrane is hydrophobic in nature. in order to integrate into membrane, the protein must have a hydrophobic core and amphipathic in nature.
23) option E. to mediate cell to cell interaction. for example lectins.
24) option B. the molecules which are small and hydrophobic can pass easily to cell membrane.
25) option C. it is a passive process in which molecules move from a region of higher conentration to a region of lower concentration.
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