AP Bio-Exam 2 Questions and Answers
The four most common elements in living organisms include all except:
a. hydrogen
b. nitrogen
c. sodium
d. carbon
e. oxygen
c. sodium
Which of the following statements best describes a compound?
a. A compound is a pure element.
b. A compound contains two or more different elements in a fixed ratio.
c. A compound is exemplified by sodium.
d. A compound is a solution
b. A compound contains two or more different elements in a fixed ratio.
The atomic number of an element is determined by the number of:
a. electrons
b. protons
c. neutrons
d. ions
b. protons
When full, the innermost electron shell of neon (atomic number = 10) contains ________ electrons,
and the outermost shell contains ________ electrons.
a. 2 . . . 8
b. 8 . . . 2
c. 5 . . . 5
d. 0 . . . 10
a. 2 . . . 8
A covalent bond is made when atoms:
a. donate electrons
b. take electrons
c. share electrons
d. share protons
e. explode
c. share electrons
What change is occurring in this figure?
a. Chlorine is losing an electron.
b. Sodium is becoming negatively charged.
c. Sodium is filling its third electron shell.
d. Chlorine is filling its third electron shell.
d. Chlorine is filling its third electron shell.
In a water molecule, hydrogen and oxygen are held together by a ________ bond ( be careful!).
a. double covalent
b. nonpolar covalent
, c. polar covalent
d. hydrogen
c. polar covalent
In the equation 2 H2 + O2 → 2 H2O, the H2 and O2 molecules are ________ and the H2O molecules
are ________.
a. reactants . . . products
b. products . . . reactants
c. created . . . destroyed
d. used . . . stored
a. reactants . . . products
The hydrogen bonds shown in this figure are each
a. between two hydrogen atoms.
b. between an oxygen and a hydrogen atom of the same water molecule.
c. between an oxygen and a hydrogen atom of different water molecules.
d. between two atoms with the same charge.
c. between an oxygen and a hydrogen atom of different water molecules.
True or False: A solution of pH 2 is 100 times more acidic than a solution of pH 4.
a. True
b. False
a. True
Water's surface tension and heat storage capacity is accounted for by its
a. orbitals
b. hydrogen bonds
c. mass
d. size
b. hydrogen bonds
We have an expert-written solution to this problem!
Which of the following statements regarding carbon is false?
a. carbon has a tendency to form covalent bonds
b. carbon has the ability to bond with up to six other atoms
c. carbon has the capacity to form single and double bonds
d. carbon has the ability to bond together to form branched, or unbranched "carbon skeletons"
b. carbon has the ability to bond with up to six other atoms
All alcohols have what kind of functional group?
a. hydroxyl
b. carbonyl
c. amino acid
d. carboxyl
e. phosphate
a. hydroxyl
Which of the following is an amino group?
a. -OH
b. -NH2
The four most common elements in living organisms include all except:
a. hydrogen
b. nitrogen
c. sodium
d. carbon
e. oxygen
c. sodium
Which of the following statements best describes a compound?
a. A compound is a pure element.
b. A compound contains two or more different elements in a fixed ratio.
c. A compound is exemplified by sodium.
d. A compound is a solution
b. A compound contains two or more different elements in a fixed ratio.
The atomic number of an element is determined by the number of:
a. electrons
b. protons
c. neutrons
d. ions
b. protons
When full, the innermost electron shell of neon (atomic number = 10) contains ________ electrons,
and the outermost shell contains ________ electrons.
a. 2 . . . 8
b. 8 . . . 2
c. 5 . . . 5
d. 0 . . . 10
a. 2 . . . 8
A covalent bond is made when atoms:
a. donate electrons
b. take electrons
c. share electrons
d. share protons
e. explode
c. share electrons
What change is occurring in this figure?
a. Chlorine is losing an electron.
b. Sodium is becoming negatively charged.
c. Sodium is filling its third electron shell.
d. Chlorine is filling its third electron shell.
d. Chlorine is filling its third electron shell.
In a water molecule, hydrogen and oxygen are held together by a ________ bond ( be careful!).
a. double covalent
b. nonpolar covalent
, c. polar covalent
d. hydrogen
c. polar covalent
In the equation 2 H2 + O2 → 2 H2O, the H2 and O2 molecules are ________ and the H2O molecules
are ________.
a. reactants . . . products
b. products . . . reactants
c. created . . . destroyed
d. used . . . stored
a. reactants . . . products
The hydrogen bonds shown in this figure are each
a. between two hydrogen atoms.
b. between an oxygen and a hydrogen atom of the same water molecule.
c. between an oxygen and a hydrogen atom of different water molecules.
d. between two atoms with the same charge.
c. between an oxygen and a hydrogen atom of different water molecules.
True or False: A solution of pH 2 is 100 times more acidic than a solution of pH 4.
a. True
b. False
a. True
Water's surface tension and heat storage capacity is accounted for by its
a. orbitals
b. hydrogen bonds
c. mass
d. size
b. hydrogen bonds
We have an expert-written solution to this problem!
Which of the following statements regarding carbon is false?
a. carbon has a tendency to form covalent bonds
b. carbon has the ability to bond with up to six other atoms
c. carbon has the capacity to form single and double bonds
d. carbon has the ability to bond together to form branched, or unbranched "carbon skeletons"
b. carbon has the ability to bond with up to six other atoms
All alcohols have what kind of functional group?
a. hydroxyl
b. carbonyl
c. amino acid
d. carboxyl
e. phosphate
a. hydroxyl
Which of the following is an amino group?
a. -OH
b. -NH2
