Concepts of Biology
1st Edition
ISBN: 9781938168116
Author: Samantha Fowler, Rebecca Roush, James Wise
Publisher: OpenStax College
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Textbook Question
Chapter 2, Problem 10RQ
Phospholipids are important components of_______.
a. the plasma membrane of cells
b. the ring structure of steroids
c. the waxy covering on leaves
d. the double bond in hydrocarbon chains
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Phospholipids are important components of
A. bacterial cell walls
B. ribosomes
C. carbohydrates
D. steroid lipids
E. lipid droplets
Which 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.
which statement about phospholipids is false?
a. they are hydrophobic at one end
b. they are hydrophilic at one end
c. they are used as organisms main form of long-term energy storage
d. they are a major constituent of cell membranes
Chapter 2 Solutions
Concepts of Biology
Ch. 2 - Figure 2.3 How many neutrons do (K) potassium-39...Ch. 2 - Magnesium has an atomic number of 12. Which of the...Ch. 2 - Which type of bond represents a weak chemical...Ch. 2 - An isotope of sodium (Na) has a mass number of 22....Ch. 2 - Which of the following statements is not true? a....Ch. 2 - Using a pH meter, you find the pH of an unknown...Ch. 2 - The pH of lemon juice is about 2.0, whereas tomato...Ch. 2 - An example of a monosaccharide is ________. a....Ch. 2 - Cellulose and starch are examples of______. a....Ch. 2 - Phospholipids are important components of_______....
Ch. 2 - The monomers that make up proteins are...Ch. 2 - Why are hydrogen bonds and van der Waals...Ch. 2 - Why can some insects walk on water?Ch. 2 - Explain why water is an excellent solvent.Ch. 2 - Explain at least three functions that lipids serve...Ch. 2 - Explain what happens if even one amino acid is...
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- Cell membranes consists mainly of ________ and ________ . a. lipids; carbohydrates c. lipids; phospholipids b. phospholipids; protein d. phospholipids; ECMarrow_forwardWhich of the following best describes a phospholipid? A. They contain a phosphate group in the place of one fatty acid B.The heads are polar C.They are energy storage molecules in the cell D. The tails are non-polararrow_forwardThe structure of a lipid bilayer is determined by the particular properties of its lipid molecules. What would happen if A. Phospholipids had only one hydrocarbon tail instead of two?B. The hydrocarbon tails were shorter than normal, say, about 10 carbon atoms long?C. All of the hydrocarbon tails were saturated?D. All of the hydrocarbon tails were unsaturated?E. The bilayer contained a mixture of two kinds of phospholipid molecules, one with two saturated hydrocarbon tails and the other with two unsaturated hydrocarbon tails?F. Each phospholipid molecule were covalently linked through the end carbon atom of one of its hydrocarbon tails to a phospholipid tail in the opposite monolayer?arrow_forward
- Which of the following are the main structural components of the lipid bilayer of all cell membranes? A. Phospholipids B. Waxes C. Triglycerides D. Steroidsarrow_forwardWhich of the following molecules is not capable of forming lipid bilayers? a. glycolipids b. wax esters c. phospholipids d. cerebrosidesarrow_forwardA) Briefly describe the basic structure of phospholipids and explain how they can provide an effective barrier against the unregulated movement of molecules into or out of cells. B) Not all phospholipids are identical to one another. Describe two components (parts) of that can be altered to create variation between different phospholipids.arrow_forward
- What portion of a phospholipid does not associate with water? A.) the fatty acid tails B.) glycerol E.) entire molecule D.) the phosphate grouparrow_forwardThis molecule is a: a) phospholipid b) nucleic acid c) fatty acid d) carbohydrate e) amino acidarrow_forwardPhospholipids are important components of__________.a. the plasma membrane of cellsb. the ring structure of steroidsc. the waxy covering on leavesd. the double bond in hydrocarbon chainsarrow_forward
- Take a look at this molecule. a) What type of molecule is this? b) How do you know? c) Describe the variety of larger molecules made from this molecule.arrow_forwardDetergents are similar to phospholipids in that they are amphiphilic molecules with both polar and nonpolar parts.What do you think would happen to a cell placed in a solution containing a detergent?arrow_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_forward
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