Which of the following characteristics is true for the inner section of a membrane? O hydrophilic O contains water O polar O hydrophobic Which of the following is NOT a primary function of lipids? O signalling / hormones / inflammation O storing certain vitamins O production of enzymes O formation of membrane structure

Which of the following characteristics is true for the inner section of a membrane? O hydrophilic O contains water O polar O hydrophobic Which of the following is NOT a primary function of lipids? O signalling / hormones / inflammation O storing certain vitamins O production of enzymes O formation of membrane structure

BIOLOGY:CONCEPTS+APPL.(LOOSELEAF)

10th Edition

ISBN:9781305967359

Author:STARR

Publisher:STARR

Chapter4: Cell Structure

Section: Chapter Questions

Problem 7SA: Most of a membranes diverse functions are carried out by ________ . a. proteins c. nucleic acids b....

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All the following is a function of membrane proteins EXCEPT: Cell-cell contact O Protein synthesis Transporting substances cross the membrane O Enzymatic activity which of the following sentences are INCORRECT: All living things are composed of one cells all cells have the same size The cell is the basic structural, O functional, and biological unit of all organisms Robert Hook discovered the cells
Which of the following statements about lipids in membranes is FALSE? O Membrane curvature may be controlled by the size of head groups in lipids O Lipids can move laterally within a membrane leaflet O Liposomes are synthesized membrane structures used to study membranes in the laboratory Flexion is when the hydrophobic tails of lipids swing and cross each other O Lipids flip-flop from the inner leaflet to the outer leaflet spontaneously
The extracellular matrix is NOT composed of? OActin O Collagens Fibronectin O Proteoglycans O None of these
Which of the following components of the cell membrane is found exclusively in the inner layer of the lipid bilayer? Ocholesterol O glycolipids O charged phospholipids O channels O receptors
Which of these can never cross the lipid bilayer without the help of a transporter or a channel? O CO2 O 02 O water O Na+ O all of the above can diffuse through the lipid bilayer without transporter proteins or channels
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A biochemist performed a subcellular fractionion ( a separation of cell organelles) and them run TLC to measure the relative presense of defererent lipids. In one fraction there was an absence of cholesterol. What fraction was it? O plasma membrane O cytoplasm O lysosome mitochondria O nucleus
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The cell membrane facing the intracellular fluid is lined by the following: O a. No Charges Ob Positive Charges OC. Negative Charges Od A and B Oe. A and C