What Is Life? A Guide to Biology with Physiology
4th Edition
ISBN: 9781319065447
Author: Jay Phelan
Publisher: W. H. Freeman
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Chapter 2, Problem 5MC
Summary Introduction
Introduction:
The hydrogen bonding in water gives it a high heat capacity.
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Which of the following best describes the process of Dissociation?
A. the breaking of covalent bonds by water molecules.
B. the breaking of polar bonds by water molecules.
C. the breaking of ionic bonds by water molecules.
D. the forming of polar bonds by lipophilic molecules.
.Amino acids
a. have high dipole moments.
b. are weak acids.
c. with high molecular masses will be insoluble in water.
d. are weak bases.
Which statement is false?
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
Chapter 2 Solutions
What Is Life? A Guide to Biology with Physiology
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- The ability of non-polar substances like fat molecules to clump together in water thereby allowing minimal contact between the fat molecules and water is attributed to: Group of answer choices a. Hydrogen bonds b. Ionic bonds c. Van der Waal’s interactions d. Hydrophobic interactions e. Cystine bridgesarrow_forwardWhich of the following describes the interaction between the amino acid last eluted and the anion exchanger at pH 7? a. dipole-dipole b. hydrophobic c. ionic d. H-bondingarrow_forwardUnlike a phospholipid, cholesterol hasa. a glycerol backbone.b. a polar phosphate group.c. a multiple ring structure.d. unsaturated fatty acid chainsarrow_forward
- What is the major consequence of the H- bonding interactions among water molecules? A. Polarity of water molecules B. Water can dissolve most cellular components except lipids. C. Water can exist in 3 phases over a broad range of temperatures. D. Only water can sustain life E. All of thesearrow_forwardtwo of these statements are truths and one is a lie. Which of the following statements is a lie? a. The concept of pH is exclusive of how buffers work. b. Salts dissociate into ions (except H+ and OH-) when dissolved in water. c. ATP stores a large amount of potential energy.arrow_forwardWhich of the following statements is true? a. Acids and bases cannot mix together. b. Acids and bases will neutralize each other. c. Acids, but not bases, can change the pH of a solution. d. Acids donate hydroxide ions (OH–); bases donate hydrogen ions (H+).arrow_forward
- What is the chemical mechanism by which cells make polymers from monomers? Group of answer choices A. phosphodiester linkages B. the formation of disulfide bridges between monomers C. hydrolysis D. ionic bonding of monomers E. dehydration reactionsarrow_forwardWhich of the following statements about chemicalbonds is true?a. Covalent bonds are stronger than ionic bonds.b. Hydrogen bonds occur between two atoms ofhydrogen.c. Bonding readily occurs between nonpolar andpolar molecules.d. A molecule of water is unlikely to bond with anion.arrow_forwardLecithin is a.a carbohydrate. b.a protein. c.a steroid. d.a phospholipid.arrow_forward
- Which of the following bonding types is the most important in the nonaqueous interfaces between protein subunits? a. van der Waals interactions b. the hydrophobic effect c. ionic bonds d. disulfide bridgesarrow_forward2) dehydration reaction means ? A. molecules are breaking down by adding water. B. molecules are breaking down by removing water. C. forming a macromolecule by adding water. D. forming a macromolecule by removing water.arrow_forwardWhich of the following does NOT involve non-covalent interactions? a.Interaction between salt and water b.3D structure of a protein c.Interaction between a ligand and protein d.The synthesis of macromoleculesarrow_forward
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