Bio 1500 Final Exam REVISED ACTUAL
Exam Questions and CORRECT Answers
Types of hydrogen bonds formed by water - CORRECT ANSWER - -Polar covalent
bonds: different charges share electrons
-Cohesion: same substance attraction, forms water molecules (high surface tension)
-Adhesion: different substances attraction
How does the polarity of water enable life-giving properties? - CORRECT ANSWER - Its
slightly negative and slightly positive charge makes it polar. This allows hydrogen bonds, which
make water a universal solvent.
Properties of acids - CORRECT ANSWER - -pH less than 7
-sour taste
-electrolytes
-react with metal to form hydrogen gas
-turn blue litmus red
Properties of bases - CORRECT ANSWER - -pH more than 7
-bitter taste
-don't react with metal
-turn red litmus blue
-can conduct electricity
Difference between ions and isotopes - CORRECT ANSWER - -Ions have lost or gained
electrons
-Isotopes have lost or gained neutrons
, Determining valence electrons - CORRECT ANSWER - Periodic table use, or the number
of electrons in the outermost shell
Hydroxyl group - CORRECT ANSWER - A functional group consisting of a hydrogen
atom joined to an oxygen atom by a polar covalent bond. Molecules possessing this group are
soluble in water and are called alcohols.
Methyl group - CORRECT ANSWER - A chemical group consisting of a carbon bonded to
three hydrogen atoms. The methyl group may be attached to a carbon or to a different atom.
Carbonyl group - CORRECT ANSWER - A chemical group consisting of a carbon atom
linked by a double bond to an oxygen atom
Carboxyl group - CORRECT ANSWER - A functional group consisting of a single carbon
atom double-bonded to an oxygen atom and also bonded to a hydroxyl group.
Amino group - CORRECT ANSWER - A functional group that consists of a nitrogen atom
bonded to two hydrogen atoms
Phosphate group - CORRECT ANSWER - A functional group consisting of a phosphorus
atom covalently bonded to four oxygen atoms
Sulfhydryl group - CORRECT ANSWER - A functional group consisting of a sulfur atom
bonded to a hydrogen atom (—SH).
Isomers - CORRECT ANSWER - Compounds with the same formula but different
structures
Structural isomers - CORRECT ANSWER - Have different covalent arrangements of their
atoms
Exam Questions and CORRECT Answers
Types of hydrogen bonds formed by water - CORRECT ANSWER - -Polar covalent
bonds: different charges share electrons
-Cohesion: same substance attraction, forms water molecules (high surface tension)
-Adhesion: different substances attraction
How does the polarity of water enable life-giving properties? - CORRECT ANSWER - Its
slightly negative and slightly positive charge makes it polar. This allows hydrogen bonds, which
make water a universal solvent.
Properties of acids - CORRECT ANSWER - -pH less than 7
-sour taste
-electrolytes
-react with metal to form hydrogen gas
-turn blue litmus red
Properties of bases - CORRECT ANSWER - -pH more than 7
-bitter taste
-don't react with metal
-turn red litmus blue
-can conduct electricity
Difference between ions and isotopes - CORRECT ANSWER - -Ions have lost or gained
electrons
-Isotopes have lost or gained neutrons
, Determining valence electrons - CORRECT ANSWER - Periodic table use, or the number
of electrons in the outermost shell
Hydroxyl group - CORRECT ANSWER - A functional group consisting of a hydrogen
atom joined to an oxygen atom by a polar covalent bond. Molecules possessing this group are
soluble in water and are called alcohols.
Methyl group - CORRECT ANSWER - A chemical group consisting of a carbon bonded to
three hydrogen atoms. The methyl group may be attached to a carbon or to a different atom.
Carbonyl group - CORRECT ANSWER - A chemical group consisting of a carbon atom
linked by a double bond to an oxygen atom
Carboxyl group - CORRECT ANSWER - A functional group consisting of a single carbon
atom double-bonded to an oxygen atom and also bonded to a hydroxyl group.
Amino group - CORRECT ANSWER - A functional group that consists of a nitrogen atom
bonded to two hydrogen atoms
Phosphate group - CORRECT ANSWER - A functional group consisting of a phosphorus
atom covalently bonded to four oxygen atoms
Sulfhydryl group - CORRECT ANSWER - A functional group consisting of a sulfur atom
bonded to a hydrogen atom (—SH).
Isomers - CORRECT ANSWER - Compounds with the same formula but different
structures
Structural isomers - CORRECT ANSWER - Have different covalent arrangements of their
atoms
