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13 All of the following are common in animal cell membranes EXCEPT B) sphingosin

ID: 272648 • Letter: 1

Question

13 All of the following are common in animal cell membranes EXCEPT B) sphingosine A) cholesterol C) cellulose What is the name of the membrane microdomains that are thicker and more rigid and enriched with cholesterol, sphingolipids, and saturated fatty acids? A) lipid rafts C) smooth ER D) glycolipids E) proteins 14 B) vesicles D) glycolipids 15 The following is a picture of the type of amino acid? polar non-polar B) basic D) acidic CH, CH HC-CH H,N-C-C-O 16 Cells from an advanced malignant tumor most often have very abnormal chromosomes, and often an abnormal total number of chromosomes. Why might this occur? A) Cancer cells are no longer density-dependent. B) Cancer cells are no longer anchorage-dependent. Chromosomally abnormal cells can still go through cell cycle checkpoints. D) Chromosomally abnormal cells still have normal metabolism. 17 Which one does not belong to endomembrane system? A) Lysosome B) Ribosome C) Endosome D) Plasma membrane Endocytosis Is an example of A) Vesicle transport B) Passive transport C) Active transport D) Simple diffusion 18 19 The main function of what is to synthesize lipids and store calcium. A) Rough ER B) Smooth ER C) Golgi Apparatus D) Peroxisomes Page 3 of 7

Explanation / Answer

13. CELLULOSE

14. LIPID RAFTS

17. PLASMA MEMBRANE

18. ACTIVE TRANSPORT

19. SMOOTH ER

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