WHAT IS LIFE? ACHIEVE 1 TERM ACCESS CODE
5th Edition
ISBN: 9781319516116
Author: PHELAN
Publisher: MAC HIGHER
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Chapter 3, Problem 7MC
Summary Introduction
Introduction:
Lipids do not serve as the major short-term energy source for organisms.
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Which of the following is not a function of lipids?
A. They catalyze reactions and reduces activation energy
B. Main component of the cell membrane
C.Used in cooking and as alternative fuel sources
D. Long term energy storage
Identify which lipids are important components of the cellular membrane. SELECT ALL THAT APPLY
A. Phospholipids
B. Bile Salts
C. Fatty Acids
D. Cholesterol
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.
Chapter 3 Solutions
WHAT IS LIFE? ACHIEVE 1 TERM ACCESS CODE
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- 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 chainsarrow_forwardCell membranes consists mainly of ________ and ________ . a. lipids; carbohydrates c. lipids; phospholipids b. phospholipids; protein d. phospholipids; ECMarrow_forwardWhat 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 tailsarrow_forward
- Which of the following fatty acids, if incorporated into a typical eukaryotic membrane phospholipid, would be the most likely to decrease that membrane’s fluidity? A. linolenic acid, with 18 carbons and three carbon-to-carbon double bonds B. linoleic acid, with 18 carbons and two carbon-to-carbon double bonds C. oleic acid, with 18 carbons and one carbon-to-carbon double bond D. stearic acid, with 18 carbons and no carbon-to-carbon double bonds E. all of the above molecules are saturated, and equally likely to decrease membrane fluidityarrow_forwardPhospholipids are important components of A. bacterial cell walls B. ribosomes C. carbohydrates D. steroid lipids E. lipid dropletsarrow_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
- The following are functions of lipids EXCEPT A. Isolate cellular components from its environment B. Serve as signal molecules and mediators of cellular processes C. Membrane fluidity determinant D. Alternative energy source of cells O E. Facilitate movement of metabolites in and out of cellsarrow_forwardcannot diffuse across a lipid bilayer. a. Water molecules b. Gases c. lons d. Nonpolar moleculesarrow_forwardLecithin is a.a carbohydrate. b.a protein. c.a steroid. d.a phospholipid.arrow_forward
- Which biomolecule is correctly characteristed? A Lecithin phosphorylated glyceride found in cell membrane B Palmitic acid unsaturated fatty acid with 18 carbon atoms c Adenylic acid adenosine with glucose phosphate molecule D Alanine amino acid contains an amino acid and an acidic group anywhere in the molecule.arrow_forwardWhich one of the following statements about lipids is correct?a. Saturated fats contain many double bonds.b. Unsaturated fats do not have double bonds.c. Fatty acids contain 9 kilocalories per gram.d. Steroids consist of chain structure molecules.arrow_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
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