Biology 2e
2nd Edition
ISBN: 9781947172517
Author: Matthew Douglas, Jung Choi, Mary Ann Clark
Publisher: OpenStax
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Textbook Question
Chapter 5, Problem 5RQ
Which characteristic of a phospholipid contributes to the fluidity of the membrane?
- its head
- cholesterol
- a saturated fatty acid tail
- double bonds in the fatty acid tail
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A phospholipid can be used to do all the following except
O Increase the fluidity with the presence of unsaturated fatty acid tails.
create a bi-layer membrane using amphipathic properties.
form a micelle using a single layer and a hydrophobic core.
O connect to a glycerol molecule to create a triacylglyceride.
Which of the following is a true statement?
Sphingolipids contain 2 hydrophobic, acyl chains
Phospholipids contain 3 hydrophobic acyl chains
Sphingolipids are completely no-polar, hydrophobic molecules
The different types of phospholipids do not have different physical properties when in the membrane
Which of the following descriptions is the best for a phospholipid?
A polar lipid molecule that fully repels water through all its parts
A lipid molecule that consists of two fatty acids, glycerol and a phosphate group
and is amphipathic
A polar lipid molecule that is made nonpolar by the addition of a phosphate
group
O A polar lipid molecule that fully interacts with water
O A nonpolar lipid molecule that is made fully polar by the addition of a phosphate
group so it can interact with water
Chapter 5 Solutions
Biology 2e
Ch. 5 - Figure 5.12 A doctor injects a patient with what...Ch. 5 - Figure 5.16 Injecting a potassium solution into a...Ch. 5 - Figure 5.19 If the pH outside the cell decreases,...Ch. 5 - Which plasma membrane component can be either...Ch. 5 - Which characteristic of a phospholipid contributes...Ch. 5 - What is the primary function of carbohydrates...Ch. 5 - A scientist compares the plasma membrane...Ch. 5 - Water moves via osmosis. throughout the cytoplasm...Ch. 5 - The principal force driving movement in diffusion...Ch. 5 - What problem is faced by organisms that live in...
Ch. 5 - In which situation would passive transport not use...Ch. 5 - Active transport must function continuously...Ch. 5 - How does the sodium-potassium pump make the...Ch. 5 - What is the combination of an electrical gradient...Ch. 5 - What happens to the membrane of a vesicle after...Ch. 5 - Which transport mechanism can bring whole cells...Ch. 5 - In what important way does receptor-mediated...Ch. 5 - Many viruses enter host cells through receptor-...Ch. 5 - Which of the following organelles relies on...Ch. 5 - Imagine a cell can perform exocytosis, but only...Ch. 5 - Why is it advantageous for the cell membrane to be...Ch. 5 - Why do phospholipids rend to spontaneously orient...Ch. 5 - How can a cell use an extracellular peripheral...Ch. 5 - Discuss why the following affect the rate of...Ch. 5 - Why does water move through a membrane?Ch. 5 - Both of the regular intravenous solutions...Ch. 5 - Describe two ways that decreasing temperature...Ch. 5 - A cell develops a mutation in its potassium...Ch. 5 - Where does the cell get energy for active...Ch. 5 - How does the sodium-potassium pump contribute to...Ch. 5 - Glucose from digested food enters intestinal...Ch. 5 - The sodium/calcium exchanger (NCX) transports...Ch. 5 - Why is it important that there are different types...Ch. 5 - Why do ions have a difficult time getting through...
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.Similar questions
- What is the role of cholesterol in the cell membrane? It converts cis bonds of fatty acids to trans. It allows for the formation of micelle structures. It attracts to the polar phospholipid heads. It reduces membrane fluidity.arrow_forwardWhich of the following serve as signaling molecules located along the membrane? Glycolipids Sphingolipids Phospholipids Sterol lipidsarrow_forwardWhich statement is correct about the phospholipids in membranes? The polar heads face inward The non-polar tails face outward The non-polar tails are hydrophilic A bilayer forms with the heads facing outward and the tails facing inwardarrow_forward
- Which portion of a phospholipid is hydrophilic? saturated fatty acid tails none- a phospholipid is a lipid so the entire molecule is hydrophobic glycerol/phosphate heads unsaturated fatty acid tailsarrow_forwardWhich of the following describes how regions of phospholipids are arranged in the cell membrane? Hydrophobic fatty acid regions are positioned toward polar environments. Hydrophilic phosphate regions are positioned toward nonpolar environments. Hydrophilic phosphate regions face each other within the interior of the cell membrane. Hydrophobic fatty acid regions face each other within the interior of the cell membrane.arrow_forwardCholesterol 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 7arrow_forward
- Lipid rafts form because membrane component such as sphingolipids and cholesterol molecules preferentially associate with another. Why do you think that the aggregates are limited in size?arrow_forwardWhich 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 receptorsarrow_forwardPhospholipids are usually described as being able to diffuse freely through a lipid membrane. What are the types of movements allowed for phospholipids are what are different limits to movement of phospholipids in the membranearrow_forward
- Which of the following would you expect to be freely permeable through a pure lipid bilayer? molecular nitrogen fructose ATP sodium ions helium glucose glycine carbon dioxidearrow_forward“Plasma membrane is described as protein iceberg in sea of lipids”. why ?arrow_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_forward
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