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Quiz Chapter 2

Cell Biology

QuestionAnswer
Water is an excellent solvent for sugars
Starch, DNA, enzymes, and antibodies are all examples of macromolecules
Which of the following represents the strongest single covalent bond? C-H
Which of the following properties is characteristic of water? All of the other answer choices are properties that are characteristic of water.
Which of the following is a basic principle of macromolecular assembly? Monomers activated by ATP are added to only one end of a polymer by condensation.
The addition of some amphipathic molecules (such as detergents) to water decreases the surface tension of water. Which of the following must be true? The intermolecular hydrogen bonding of water is being weakened by the detergent
Which answer correctly shows the hierarchical nature of cellular structure from the simplest to the most complex? Organic molecules, macromolecules, organelles, a cell
Which of the following is a logical reason for not considering phospholipids as a true macromolecule/monomer? Phospholipids are not synthesized from monomers that meet the qualities of being small, water-soluble organic molecules
Which of the following is the most accurate description of an animal cell membrane? An animal cell membrane is a selectively permeable membrane that is composed of a bilayer of amphipathic phospholipids and glycolipids that are interspersed with sterols and membrane proteins, which can serve as transporters, enzymes, and receptors.
Enantiomers are molecules that are mirror images
How many stereoisomers are possible for the ribose molecule with 3 asymmetric carbons? 8
Consider the following data: The freezing point of water under standard conditions is 0°C whereas the freezing point of a 0.5 molar solution of NaCl in water is < 0°C. Which of the following most accurately accounts for this data? Electrostatic interactions between water and NaCl inhibit water from forming hydrogen bonds with itself to promote freezing
________ facilitate the assembly of proteins but are not components of the protein or protein-containing structure. Chaperones
Which of the following is not a consequence of the polar nature of water? All of the other answer choices are consequences of the polar nature of water.
Phosphatidyl ethanolamine is a major class of membrane phospholipid. Therefore, it is ________. made up of a polar head and two nonpolar tails
________ serve as hydrophilic channels through hydrophobic membranes, or they act as carriers of specific solutes. Transport proteins
The carbon atom is tetravalent. This means that ________. a carbon atom can complete its valence shell by forming four covalent bonds
Created by: mjs021
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