Which of the following is used in the reaction called saponification? A. Strong Base B. Hydrogen C. Strong acid D. Nickel Fatty acids contain in __ - hydrogen bonds, making them __. The Phosphate "head" in a phospholipid is __. The entire phospholipid molecule, therefore, is __. A. Carbon; hydrophobic; hydrophilic; amphiphilic B. Hydrogen; hydrophilic; hydrophilic; amphiphilic C. Carbon; hydrophilic; hydrophilic; hydrophobic D. Hydrogen; hydrophobic; hydrophobic; hydrophobic

Which of the following is used in the reaction called saponification? A. Strong Base B. Hydrogen C. Strong acid D. Nickel Fatty acids contain in - hydrogen bonds, making them . The Phosphate "head" in a phospholipid is . The entire phospholipid molecule, therefore, is . A. Carbon; hydrophobic; hydrophilic; amphiphilic B. Hydrogen; hydrophilic; hydrophilic; amphiphilic C. Carbon; hydrophilic; hydrophilic; hydrophobic D. Hydrogen; hydrophobic; hydrophobic; hydrophobic

Concepts of Biology

1st Edition

ISBN:9781938168116

Author:Samantha Fowler, Rebecca Roush, James Wise

Publisher:Samantha Fowler, Rebecca Roush, James Wise

Chapter2: Chemistry Of Life

Section: Chapter Questions

Problem 10RQ: Phospholipids are important components of_______. a. the plasma membrane of cells b. the ring...

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Define the following terms:a. saponificationb. wax esterc. waxd. phospholipide. polar head group
The diagram below illustrates the molecular structure of the cell membrane. The phospholipid bilayer of a cell membrane A B polar group с phosphate glycerol Which of the following is false about the way in which the cell membrane maintains its structure? D water water The different components of an individual phospholipid are held by covalent bonds. The attraction between the individual lipid tails inside the cell membrane is maintained by van der Waals forces. The attraction between the phosphate groups and the water molecules inside and out. side of the cell is maintained by hydrogen bonds. The bonds between the individual phospholipids that make up the cell membrane are connected by covalent bonds.
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
1) Hydrogen bonds are critical to life because theyGroup of answer choices Are involved in the secondary structure of a folded protein Are critical for the properties of water Are involved in tertiary structure of a folded protein Are involved in base paring of nucleotides All of the above. 2) A transport system that moves two different solutes into the cell by diffusion (greater concentrations outside the cell than in it) could be called a(n) _______ Group of answer choices active symport active uniport active antiport passive symport passive antiport
Phospholipids 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 chains
What chemical property of phospholipids is key to the formation ofthe cell membrane?a. The positively charged nitrogen atomb. The covalent bond between the phosphate and the glycerolc. The kink in the fatty acid taild. The hydrophilic head and hydrophobic tails
1. Draw 8 phospholipid molecules arranged to show how the phospholipids will orient themselves on the surface of the water. This should be a single layer or monolayer. Label the hydrophilic and hydrophobic parts of a phospholipid. 2. Now draw 8 phospholipids, arranged so that they are submerged in the water while still maintaining the correct hydrophobic and hydrophilic interactions. This structure is called a micelle. 3) Draw a structure that is both submerged in water and contains water on the inside. Draw phospholipids oriented to form a cell membrane, with the tails in and the hydrophilic heads out.
Which 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-polar
The following figure shows a typical phospholipid. Suppose this molecule was incorporated into a cell membrane. Which letter indicates the portion of the molecule that would be exposed to the aqueous environment? CH₂ I H₂C-N¹-CH₂ CH₂ A H₂C H₂C H₂C CH₂ CH₂O HO CH ₂ H₂C H₂C CH₂ OH HO O–CH, H₂C H₂C H₂C CH₂ HC CH₂ CH₂ CH-O CH-OH H₂C CH₂ H₂C CH₂ H₂C/ H₂C H₂C H₂C H₂C CH₂ H₂C CH₂ CH₂ CH₂ CH₂ CH₂ CH₂ CH₂ H₂C/
A phospholipid ________.a. has both polar and nonpolar regionsb. is made up of a triglyceride bonded to aphosphate groupc. is a building block of ATPd. can donate both cations and anions in solution
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.
Consider molecule #1. How would these molecules arrange themselves when added to water? A. Would dissolve in water B. Would form a micelle C. Would form a bilayer