Biology: Concepts and Investigations
5th Edition
ISBN: 9781260259049
Author: Hoefnagels
Publisher: MCG
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Chapter 3, Problem 2MCQ
Summary Introduction
Introduction:
The cell membrane or plasma membrane of all the cells is made up of phospholipids and proteins. The phospholipids for a bi-lipid layer around the cytoplasm and the proteins are embedded in it. It is fluid as explained by the fluid mosaic model.
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Students have asked these similar questions
Why are phospholipids the main lipid component of
membranes?
A. these molecules can interact with each other
B. these molecules contain hydrophilic groups that
interact with water
C. these molecules are nonpolar
D. these molecules are able to interact with water
while preventing continuous movements of
metabolites to and from the environment
E. these molecules are fluid and dynamic.
Which of the following are the main structural components of the lipid bilayer of all cell membranes?
A. Phospholipids
B. Waxes
C. Triglycerides
D. Steroids
Which statement is NOT correct concerning the cell membrane?
1. The fatty acid hydrophobic "tails" are contained within what becomes a double-
layered molecule.
2. This molecule provides an impermeable barrier for the cell from the watery outer
environment.
3. The overall structure of the cell membrane results from the amphiphilic phospholipid
molecules.
4. Because of the hydrophilic property of the phosphate containing "head", this "head*
orients itself toward the "watery." cytoplasm and the extracellular fluid.
Chapter 3 Solutions
Biology: Concepts and Investigations
Ch. 3.1 - Why are cells, not atoms, the basic units of life?Ch. 3.1 - How have microscopes advanced the study of cells?Ch. 3.1 - What are the original components of the cell...Ch. 3.1 - Prob. 4MCCh. 3.1 - Which molecules and structures occur in all cells?Ch. 3.1 - Describe adaptations that increase the ratio of...Ch. 3.2 - How do prokaryotic cells differ from eukaryotic...Ch. 3.2 - Prob. 2MCCh. 3.2 - Prob. 3MCCh. 3.2 - What is the relationship between cells and...
Ch. 3.2 - Prob. 5MCCh. 3.3 - How does the chemical structure of phospholipids...Ch. 3.3 - Where in the cell do phospholipid bilayers occur?Ch. 3.3 - Prob. 3MCCh. 3.3 - Prob. 4MCCh. 3.4 - Prob. 1MCCh. 3.4 - What is the function of the nucleus and its...Ch. 3.4 - Prob. 3MCCh. 3.4 - Which organelle houses the reactions that extract...Ch. 3.4 - Prob. 5MCCh. 3.4 - Prob. 6MCCh. 3.5 - Prob. 1MCCh. 3.5 - Prob. 2MCCh. 3.5 - Prob. 3MCCh. 3.6 - Prob. 1MCCh. 3.6 - Prob. 2MCCh. 3.6 - Prob. 3MCCh. 3.7 - Prob. 1MCCh. 3.7 - Prob. 2MCCh. 3 - One property that distinguishes cells in domain...Ch. 3 - Prob. 2MCQCh. 3 - Within a single cell, which of the following is...Ch. 3 - Prob. 4MCQCh. 3 - Prob. 5MCQCh. 3 - Prob. 1WIOCh. 3 - Prob. 2WIOCh. 3 - Prob. 3WIOCh. 3 - Rank the following in order from smallest to...Ch. 3 - Which cell in figure 3.31 has the highest ratio of...Ch. 3 - Prob. 6WIOCh. 3 - Prob. 7WIOCh. 3 - Prob. 8WIOCh. 3 - How does the cytoskeleton interact with other...Ch. 3 - Prob. 10WIOCh. 3 - Review the Survey the Landscape figure in the...Ch. 3 - How might you connect the terms proteins and...Ch. 3 - Add the three main components of the cytoskeleton...Ch. 3 - Prob. 4PITCh. 3 - Adel chloroplast, lysosome, and vacuole to this...
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- The main difference between a glycerophospholipid and a sphingophospholipid is which component? A. backbone B. phosphate group C. acyl grouparrow_forwardThe cell membranes are made of phospholipids arranged in a structure called the 'phospholipid bilayer'. Describe how the phospholipids interact with each other and water to keep the phospholipid bilayer together.arrow_forwardWhich is true about the phospholipid membrane? Group of answer choices: A. It is made up of phospholipid molecules which have a hydrophilic tail and a hydrophobic head B. It is made up of 4 layers of phospholipid molecules C. It is made up of phospholipids, which have a hydrophilic head and a hydrophobic tail D. It is made up mostly of proteins but has cholestrol molecules and phospholipids embedded within itarrow_forward
- Phospholipid tails can be saturated or unsaturated (Chapter 2).This is true of phospholipids in plasma membranes as well. Which type—saturated or unsaturated— would make the membrane more fluid? Why?arrow_forwardWhy do phospholipids tend to spontaneously orient themselves into something resembling a membrane such as the lipid-bilayer sphere, single-layer lipid sphere, and lipid-bilayer sheet? a. Phospholipids are amphipathic molecules. The polar head faces towards water and the nonpolar fatty acid tails face towards other fatty acid tails. b. Phospholipids are lipophilic molecules. The polar head faces towards water and the nonpolar fatty acid tails face towards other fatty acid tails c. Phospholipids are amphipathic molecules. The nonpolar head faces towards other fatty acid tails and the polar fatty acid tails face towards water. d. Phospholipids are hydrophilic molecules. The polar head faces towards water and the nonpolar fatty acid tails face towards other fatty acid tails.arrow_forwardWhich of the following molecules is not capable of forming lipid bilayers? a. glycolipids b. wax esters c. phospholipids d. cerebrosidesarrow_forward
- Sphingolipids differ from phosphoglycerides because?A. sphingolipids never have the phosphodiester linkage found in phosphoglycerides.B. sphingolipids utilize sphingosine to replace the glycerol backbone and one of the two fatty acyl tail found in phosphoglycerides.C. sphingolipids are the only lipids in lipids rafts.D. sphingolipids never contain sugar groups.arrow_forwardIdentify which lipids are important components of the cellular membrane. SELECT ALL THAT APPLY A. Phospholipids B. Bile Salts C. Fatty Acids D. Cholesterolarrow_forwardWhich of the following is incorrect regarding phospholipids?a. The heads are polar.b. The tails are nonpolar.c. They contain a phosphate group in place of one fatty acid.d. They are energy-storage molecules in the cell.arrow_forward
- What is the chemical mechanism by which cells make polymers from monomers? A. Phosphodiester linkages B. Hydrolysis C. Ionic bonding D. Dehydration reactionarrow_forwardPositively charged molecules are often more easily endocytosed by cells than negatively charged molecules. Which of these BEST explains this observation? A. The hydrocarbon tails of membrane lipids are hydrophilic. B. The hydrocarbon tails of membrane lipids are hydrophobic. C. The phosphate group of membrane lipids are positively charged. D. The phosphate group of membrane lipids are negatively charged.arrow_forwardWhich of the named factors might induce bending of membranes? Select one: O a. Cylindrically shaped lipids O b. Carbohydrates C. Conically shaped proteins O d. Cylindrically shaped proteinsarrow_forward
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