Polar R groups of closely positioned amino acids often enter into _________ with each other, which helps give a protein its three-dimensional shape.
A. hydrophobic interactions?B. ionic bonds?C. hydrogen bonds?D. van der Waal repulsions?E. sulfur-carbon bonds
C
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Disease processes, along with aging, will ________ the loss of body reserves, affecting recovery after surgery.
A. accelerate B. decrease C. slow D. diminish
Early in development, where do the first blood cell precursors form?
A. The yolk sac B. The spleen C. The liver D. The bone marrow E. The heart
Shelby offers to make digital copies of Relay Company's business conference videotapes, CDs, DVDs, and other media for $500. Under the mailbox rule, Relay's acceptance by e-mail will be considered effective when
a. received. b. sent. c. followed up by a confirmation letter sent by regular mail. d. composed on a Relay computer.
Which muscles contraction will stimulate inspiration?
A. External intercostals B. Diaphragm C. Parasternal intercostals D. All of the choices are correct.