Which type of lipids are the most abundant in the plasma membrane? sterols glyco
ID: 275188 • Letter: W
Question
Which type of lipids are the most abundant in the plasma membrane? sterols glycolipids cholesterol phospholipids 23) Signal sequences that direct proteins to the correct compartment are removed in a) soluble proteins in ER b mitochondrial proteins c) nuclear proteins d) a and b e) a, b and c Transmembrane proteins contain Hydrophilic side chains facing lipid bilayers ydrophobic back bone lydrophobic side chains facing lipid bilayers one of the above Glycolysis generates more stored energy than it expends. What is the net number of activated es produced in this process (number and type of molecules produced minus number of those molecules used as input)? 2 ATP, 2 NADH 30 ATP, 6 NADH 4 ATP, 2 NADH 4 ATP, 4 NADH 26) Lipid-linked proteins are classified as integral membrane proteins even though the vpeptide chain does not pass through the bilayer. True alse 27) The flow of protons across the mitochondrial inner-membrane is from region of higher pH to region of lower pH True alse 28) Catabolism is a general term that refers to the processes by which lar mplecules are 29) In osmosis, water moves from area of low solute concentration to the area of high solute 30) Shorter hydrocarbon tails reduce the fluidity of tha membrane synthesized from smaller molecules. True alse concentration True False True alseExplanation / Answer
22. Phospholipid is the mostaboundant lipid found in the membranes is in the form of lipid bilayer. Option D is correct.
23. Mitochondrial chaperonins are involved in removal of chaperones and mitichondrial protein remove signal sequence. Option B is correct.
24. In transmembrane protein hydrophobic region is present inside the menbrane and hydrophilic part is in continuity with extra and intracellular aqueous fluid. Option D.
25. In Glycolysis 4 ATP are generated and 2 are used hence a net gain of 2 ATPs and 2 NADH are synthesized. Option A is correct.
26. Glycoprotein are integral protein because they causes cell to cell interaction and causes signaling. Statement is true.
27. Proton motive force is generated across the Mitochondrial inner membrane due to pH difference. Statement is true.
28. Catabolism is a term used for synthesis of simple molecules from breakdown of complex one. Statement is false.
29. In osmosis water flows to attain equilibrium. Statement is true.
30. Statement is false. Because proteins are loosely attached and phospholipid can move and cause fluidity. Cholesterol also provide fluidity.
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