Campbell Essential Biology (7th Edition)
Campbell Essential Biology (7th Edition)
7th Edition
ISBN: 9780134765037
Author: Eric J. Simon, Jean L. Dickey, Jane B. Reece
Publisher: PEARSON
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Chapter 2, Problem 8SQ

Some people in your study group say they don’t understand what a polar molecule is. You explain that a polar molecule

  1. a. is slightly negative at one end and slightly positive at the other end.
  2. b. has a extra electron, giving it a positive charge.
  3. c. has a extra electron, giving it a negative charge.
  4. d. has covalent bonds.
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Temporal flexibility (the ability to change over time) of actin structures within a cell is maintained by… A. The growth/shrinkage cycle B. Periodic catastrophe C. GTP hydrolysis D. Treadmilling E. None of the above
During in vitro polymerization of actin and microtubule filaments from their subunits, what causes the initial delay in filament growth? A.Nucleation B.Reaching homeostasis C.Nucleotide exchange D.ATP or GTP hydrolysis E.Treadmilling
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