Biology I Final Exam Practice| 185 Questions| With Complete Solutions

A pair of shared valence electrons is referred to as a(n): a. covalent bond b. hydrophobic effect c. van der Waals interaction d. ionic bond correct answer: a. covalent bond For an atom that is NOT an ion, which of the following must be TRUE? a. the number of electrons equals the number of protons b. the number of protons equals the number of neutrons c. the number of electrons equals the number of neutrons correct answer: a. the number of electrons equals the number of protons As part of their normal function, many proteins bind to DNA briefly and then release it again. Which types of bonds might be involved in these transient protein-DNA interactions? a. ionic b. covalent c. van der Waals forces d. hydrogen e. all of the above f. a, c, and d g. a, b, and c correct answer: f. a, c, and d Recall that a carbon atom possesses four valence electrons, and oxygen atoms have six. Given this information, what is the MOST likely structural formula for carbo