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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Cholesterol is an integral part of plasma membranes. Based on its structure, where is it found in the membrane?
On the extracellular surface
embedded with the phospholipid heads
within the tail bilayer
attached to the intracellular surface
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 serve as signaling molecules located along the membrane?
Glycolipids
Sphingolipids
Phospholipids
Sterol lipids
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
Cell membranes consist mainly of ________ and ________. a. lipids; carbohydrates b. phospholipids; proteins c. lipids; carbohydrates d. phospholipids; ECM
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Cell membranes consists mainly of ________ and ________ . a. lipids; carbohydrates c. lipids; phospholipids b. phospholipids; protein d. phospholipids; ECM
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Which plasma membrane component can be either found on its surface or embedded in the membrane structure? a. protein b. cholesterol c. carbohydrate d. phospholipid
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In a lipid bilayer, the of all the lipid molecules are sandwiched between all of the __________. a. hydrophilic tails; hydrophobic heads b. hydrophilic heads; hydrophilic tails c. hydrophobic tails; hydrophilic heads d. hydrophobic heads; hydrophilic tails
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Cell membranes consist mainly of a _________. a. carbohydrate bilayer and proteins b. protein bilayer and phospholipids c. phospholipid bilayer and proteins
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Most of a membranes diverse functions are carried out by ________ . a. proteins c. nucleic acids b. phospholipids d. hormones
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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.
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Which molecule is important in regulating cell membrane fluidity?
Choose all that apply
Choices:
Cholesterol
Protein
Phospholipid head
Phospholipid tail
Glucose
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Which of the following components are embedded across the phospholipid bilayer?
Group of answer choices
peripheral proteins
carbohydrates
integral proteins
cholesterol
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The plasma membranes (phospholipid bilayers) of cells are most permeable to ____.
lipids
very small ions such as Na+ and K+
small water soluble hormones
hormones made from amino acids
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Which 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.
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Phospholipids are the only molecule type which make up lipid bilayers in plasma
membranes
True or False
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