Answered: Which of the following are proteins? O…

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Biology

Which of the following are proteins? O cholesterol O ion channels O phospholipids O glycolipids O none of the above

BIOLOGY:CONCEPTS+APPL.(LOOSELEAF)

10th Edition

ISBN:9781305967359

Author:STARR

Publisher:STARR

Chapter4: Cell Structure

Section: Chapter Questions

Problem 4SA: Cell membranes consists mainly of ________ and ________ . a. lipids; carbohydrates c. lipids;...

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Concept explainers

Osmosis

In simple words, osmosis is the slow, gradual movement of a liquid through a membrane. But there are nuances to this process. For instance, there has to be an imbalance in the distribution of solute in the liquid on either side of the membrane, which has to be semipermeable. The liquid in the region with a lower solute concentration moves to the region with a higher concentration, thereby displacing the solution in the process. The objective is to equalize the concentration of molecules on both sides of the membrane; the displacement of liquid can be viewed as a byproduct of this equalization. Since there is no energy required to carry osmosis, it is considered a passive process.

Question

Which of the following are proteins?
O cholesterol
O ion channels
O phospholipids
O glycolipids
O none of the above

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Cell membranes consists mainly of ________ and ________ . a. lipids; carbohydrates c. lipids; phospholipids b. phospholipids; protein d. phospholipids; ECM
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
Cholesterol is an integral part of plasma membranes. Based on its structure, where is it found in the membrane? O within the tail bilayer O on the extracellular surface O embedded with the phospholipid heads O attached to the intracellular surface
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
Which of the following membrane lipids is mainly structural? Phosphatidylthanolamine All of the other answers are correct Phosphatidylcholine Spingomyelin Inositol phospholipids
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
Which of the following components of the cell membrane is found exclusively in the outer layer of the lipid bilayer? O cholesterol O glycolipids O charged phospholipids O anchor proteins O enzymic proteins
None of the above Which of the following is amphipathic? O Phospholipids. O Integral proteins. Peripheral proteins O Phospholipids and integral proteins zyme ity is the best at:
phospholipid bilayer O protein 10 O cholesterol n protein cholesterol Using the diagram above, which component of this membrane contains a hydrophobic region and acts as the primary barrier to most foreign substances" carbohydrate chain carbohydrate chain Ophospholipid bilayer
What chemical property characterizes the interior of the phospholipid bilayer? O hydrophilic O hydrophobic saturated O polar
which is true of a phospholipid? O the fatty acid tails are hydrophilic and repel water O the fatty acid tails are hydrophobic and repel water O the entire phospholipid is hydrophilic and repels water O the glycerol heads are hydrophilic, and repcl water
Cholesterol is an integral part of plasma membranes. Based on its structure and characteristics, where is it found in the membrane? O on the extracellular surface Owithin the tail portion of the bilayer O attached to the intracellular surface O embedded with the phospholipid heads Previous Page Page 3 of 7