Biochemistry Objective Questions { Membrane Structure and Functions }

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15. The smooth endoplasmic reticulum (SER) is the site of

A. phospholipid synthesis

B. amino acid synthesis

C. carbohydrate synthesis

D. protein synthesis

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16. Lysozymes are found in

B. animal cells

C. microbial cells

D. all of these

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17. Biological membranes are like water beds because

A. they are always moving

B. they (normally) do not leak their contents

C. the membrane is thin compared to the enclosed volume

D. all of the above

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18. The plasma membrane is a selectively permeable barrier due to presence of specific transport

C. carbohydrates

D. none of these

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19. Which type of molecule spans the membrane, from its inner to outer surface according to the Fluid mosaic model of cell membranes?

B. Phospholipid

D. Carbohydrate

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20. Which of the following is correct?

A. Membranes form boundaries around the cell and distinct subcellular components

B. Membranes act as selectively permeable barrier

C. Membranes contain varying amount of lipid and protein and some contain small amount of carbohydrates

D. All of the above

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21. In membranes, lipids are

A. glycerophospholipids

B. sphingolipids

D. all of these

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