Biology 2e
2nd Edition
ISBN: 9781947172517
Author: Matthew Douglas, Jung Choi, Mary Ann Clark
Publisher: OpenStax
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Textbook Question
Chapter 3, Problem 13RQ
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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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
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.
Phospholipids are important components of
A. bacterial cell walls
B. ribosomes
C. carbohydrates
D. steroid lipids
E. lipid droplets
Chapter 3 Solutions
Biology 2e
Ch. 3 - Figure 3.5 What kind of sugars are these, aldose...Ch. 3 - Figure 3.23 Which categories of amino acid would...Ch. 3 - Figure 3.33 A mutation occurs, and cytosine is...Ch. 3 - Dehydration synthesis leads to formation of...Ch. 3 - During the breakdown of polymers, which of the...Ch. 3 - The following chemical reactants produce the ester...Ch. 3 - An example of a monosaccharide is fructose glucose...Ch. 3 - Cellulose and starch are examples of:...Ch. 3 - Plant cell walls contain which of the following in...Ch. 3 - Lactose is a disaccharide formed by the formation...
Ch. 3 - Which of the following is not an extracellular...Ch. 3 - Saturated fats have all of the following...Ch. 3 - Phospholipids are important components of...Ch. 3 - Cholesterol is an integral part of plasma...Ch. 3 - The monomers that make up proteins are called...Ch. 3 - The helix and the pleated sheet are part of...Ch. 3 - Mad cow disease is an infectious disease where one...Ch. 3 - A nucleotide of DNA may contain. ribose, uracil,...Ch. 3 - The building blocks of nucleic acids are ____. a....Ch. 3 - How does the double helix structure of DNA support...Ch. 3 - Why are biological macromolecules considered...Ch. 3 - What role do electrons play in dehydration...Ch. 3 - Amino acids have the generic structure seen below,...Ch. 3 - Describe the similarities and differences between...Ch. 3 - Why is it impossible for humans to digest food...Ch. 3 - Draw the ketose and aldose forms of a...Ch. 3 - Explain at least three functions that lipids serve...Ch. 3 - Why have trans fats been banned from some...Ch. 3 - Why are fatty acids better than glycogen for...Ch. 3 - Part of cortisol’s role in the body involves...Ch. 3 - Explain what happens if even one amino acid is...Ch. 3 - Describe the differences in the four protein...Ch. 3 - Aquaporins are proteins embedded in the plasma...Ch. 3 - What are the structural differences between RNA...Ch. 3 - What are the four types of RNA and how do they...
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- Detergents 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_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_forwardTake 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_forward
- Lecithin is a.a carbohydrate. b.a protein. c.a steroid. d.a phospholipid.arrow_forwardWhich of the following are the main structural components of the lipid bilayer of all cell membranes? A. Phospholipids B. Waxes C. Triglycerides D. Steroidsarrow_forwardThis molecule is a: a) phospholipid b) nucleic acid c) fatty acid d) carbohydrate e) amino acidarrow_forward
- Cell membranes consists mainly of ________ and ________ . a. lipids; carbohydrates c. lipids; phospholipids b. phospholipids; protein d. phospholipids; ECMarrow_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_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 molecules is not capable of forming lipid bilayers? a. glycolipids b. wax esters c. phospholipids d. cerebrosidesarrow_forwardWhich of these is not a function of the lipid bilayer? A. Changes the temperature B. Provides a flexible matrix C. Imposes a barrier to permeabilityarrow_forwardDuring “Chemical Evolution”, why are phospholipids important? a) They are living cells. b) They let polar and nonpolar molecules pass into and out of the micelle. c) The phosphate head makes the bilayer repel water. d) The Fatty Acid layer lets ionic molecules pass through. e) The Fatty Acid layer separates the inside water environment from the outside water environment.arrow_forward
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