CHEMA biological membranes is FALSE? membranes contain 30-75% (depending on the
ID: 696040 • Letter: C
Question
CHEMA biological membranes is FALSE? membranes contain 30-75% (depending on the ced) protein by mass. 6. Which of these statements about the composition of a given eukaryotic cell, all intracellular membranes have essentially the same complement of lipids and proteins c. The plasma membranes of the cells of vertebrate animals contain more cholesterol than the plasma membranes of bacteria. d. The ratio of lipid to protein varies widely among celltypes in a single organism. Triacylglycerols are not commonly found in membranes. e. 7. Which of the following statements is FALSE? a. Fatty acids exist in the anionic form at physiological pH. e in melting temperature between a saturated fatty acid and an unsaturated fatty acid with the same chain length is very small (only a few degrees Celsius). Some unsaturated fatty acids are liquid at physiological temperatures. d. c. The longer the carbon chain of a saturated fatty ac id, the higher the melting temperature 8. Carbohydrates may link to a peptide/protein through: a. aspartate or glutamate b. glutamine or arginine c. asparagine, serine, or threonine d. histidine, serine, or aspartate e· tyrosine or cysteine 9. Which of the following is a heteropolysaccharide? a. cellulose b. chitirn c. glycogen d. hyaluronate e. starch f. all of the above. g. none of the above. 10. Which of the following is a glycoconjugate? a. hyaluronan b. B-type blood antigen c. sphingomyelin d. chondroitin sulfate 11. Which of the following is an epimer of D-glucose at C-4? a. D-galactose b. L-glucose D-mannose d. D-altrose 12. Triacylglycerols a. contain a polar head group b. contain fatty acid tails C have a sphingosine backbone. d. are abundant in cell membranes. e. are used for short-term energy storage in mammalsExplanation / Answer
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Biological membrane is an enclosing membrane which acts as a barrier in living beings. All the statements about biological membrane is true except that in euakryotic cell types, all the intracellular membranes have essentially the same component of lipids and proteins. Option C is the answer.