Question 1

Three atoms have the following subatomic particles:Atom 1: 3 protons, 2 neutrons, 3 electronsAtom 2: 3 protons, 3 neutrons, 2 electronsAtom 3: 3 protons, 1 neutron, 3 electronsWhich statement best describes these three atoms?

Accepted Answer

A)   They are all the same element; they are isotopes of each other.
B)   They are three different elements; they are isotopes of each other.
C)   They are all the same element; two of the atoms are ions.
D)   They all have the same atomic number and atomic weight.E) B) and D)
F) A) and C)

Question 2

A(n)  __________ solution contains more hydroxide ions than hydrogen ions.

Accepted Answer

A)   basic
B)   neutral
C)   acidicD) All of the above
E) A) and C)

Question 3

What type of lipid is used in the production of hormones such as estrogen and testosterone?

Accepted Answer

A)   Steroids
B)   Triglycerides
C)   Phospholipids
D)   Fatty acidsE) None of the above
F) A) and B)

Question 4

Water is an example of a compound.

Accepted Answer

A) True 
 B)False

Question 5

Stearic acid and linolenic acid are both fatty acids built on chains of 18 carbon atoms. Based on their chemical composition, which of these is the saturated fatty acid?Stearic acid: 18 carbon atoms, 36 hydrogen atoms, 2 oxygen atomsLinolenic acid: 18 carbon atoms, 30 hydrogen atoms, 2 oxygen atoms

Accepted Answer

A)   Stearic acid
B)   Linolenic acidC) A) and B)
D) undefined

Question 6

A solution with a pH of 6 has ten times the hydrogen ion concentration of a solution of what pH?

Accepted Answer

A)   pH of 0.6
B)   pH of 2
C)   pH of 5
D)   pH of 7
E)   pH of 8F) B) and C)
G) D) and E)

Question 7

A pH value indicatesthe hydrogen ion concentration in solutions such as body fluids.

Accepted Answer

A) True 
 B)False

Question 8

The building blocks of triglyceride molecules are amino acids.

Accepted Answer

A) True 
 B)False

Question 9

What type of fatty acid will have double bonds between carbon atoms within its carbon chain?

Accepted Answer

A)   Unsaturated fatty acids
B)   Saturated fatty acidsC) A) and B)
D) undefined

Question 10

What type of chemical bond is formed by the attraction of the positive hydrogen end of one polar molecule to the negative nitrogen or oxygen end of another polar molecule?

Accepted Answer

A)   Ionic bond
B)   Double bond
C)   Triple bond
D)   Hydrogen bond
E)   Covalent bondF) A) and B)
G) All of the above

Question 11

Name the type of chemical bonding that occurs between the two nucleotide chains of a DNA molecule.

Accepted Answer

A)   Hydrogen bonds
B)   Ionic bonds
C)   Nonpolar covalent bonds
D)   Polar covalent bondsE) B) and C)
F) A) and D)

Question 12

Within a phospholipid molecule, the phosphate "head" is __________ and the fatty acid "tails" are __________.

Accepted Answer

A)   hydrophilic; hydrophobic
B)   hydrophobic; hydrophilicC) A) and B)
D) undefined

Question 13

All isotopes of an element have the same number of electrons.

Accepted Answer

A) True 
 B)False

Question 14

Indicate the non-carbohydrate molecule.

Accepted Answer

A)   Monosaccharide
B)   Disaccharide
C)   Protein
D)   Polysaccharide
E)   GlucoseF) B) and D)
G) A) and B)

Question 15

By what mechanism does a chemical bond form between an ion of potassium (K+)  and chloride (Cl-) ?

Accepted Answer

A)   Electrons are shared between ions, forming a bond.
B)   The opposite charges of the ions cause them to be attracted to each other, forming a bond.
C)   The protons of each nucleus are attracted to each other, forming a bond.
D)   Neutrons from one ion are transferred to the other ion, forming a bond.E) A) and B)
F) B) and D)

Question 16

In an atom, the first (innermost) shell contains a maximum of __________ electrons.

Accepted Answer

The answer of In an atom, the first (innermost) shell...

Question 17

The building blocks of __________ molecules are fatty acids and glycerol.

Accepted Answer

A)   triglyceride
B)   steroid
C)   polysaccharide
D)   proteinE) A) and B)
F) A) and C)

Question 18

Based on their subatomic makeup, which atom is actually an ion?Atom 1: 3 protons, 2 neutrons, 3 electronsAtom 2: 3 protons, 3 neutrons, 2 electronsAtom 3: 3 protons, 1 neutron, 3 electrons

Accepted Answer

A)   Atom 1
B)   Atom 2
C)   Atom 3D) None of the above
E) All of the above

Question 19

The branch of science called __________ deals with the composition of matter.

Accepted Answer

A)   histology
B)   chemistry
C)   physiology
D)   biology
E)   cytologyF) A) and D)
G) A) and C)

Question 20

The atomic __________ for an element is equal to the number of protons in the nucleus of one atom of that particular element.

Accepted Answer

The answer of The atomic __________ for an element is...

Exam 2: Chemical Basis of Life

In an atom, the first (innermost) shell contains a maximum of __________ electrons.

Correct AnswerverifiedShow Answer

The branch of science called __________ deals with the composition of matter.

Correct AnswerverifiedShow Answer

What type of lipid is used in the production of hormones such as estrogen and testosterone?

Correct AnswerverifiedShow Answer

By what mechanism does a chemical bond form between an ion of potassium (K+) and chloride (Cl-) ?

Correct AnswerverifiedShow Answer

Name the type of chemical bonding that occurs between the two nucleotide chains of a DNA molecule.

Correct AnswerverifiedShow Answer

A solution with a pH of 6 has ten times the hydrogen ion concentration of a solution of what pH?

Correct AnswerverifiedShow Answer

The atomic __________ for an element is equal to the number of protons in the nucleus of one atom of that particular element.

Correct AnswerverifiedShow Answer

Within a phospholipid molecule, the phosphate "head" is __________ and the fatty acid "tails" are __________.

Correct AnswerverifiedShow Answer

Three atoms have the following subatomic particles:Atom 1: 3 protons, 2 neutrons, 3 electronsAtom 2: 3 protons, 3 neutrons, 2 electronsAtom 3: 3 protons, 1 neutron, 3 electronsWhich statement best describes these three atoms?

Correct AnswerverifiedShow Answer

Based on their subatomic makeup, which atom is actually an ion?Atom 1: 3 protons, 2 neutrons, 3 electronsAtom 2: 3 protons, 3 neutrons, 2 electronsAtom 3: 3 protons, 1 neutron, 3 electrons

Correct AnswerverifiedShow Answer

What type of chemical bond is formed by the attraction of the positive hydrogen end of one polar molecule to the negative nitrogen or oxygen end of another polar molecule?

Correct AnswerverifiedShow Answer

The building blocks of triglyceride molecules are amino acids.

Correct AnswerverifiedShow Answer

A pH value indicatesthe hydrogen ion concentration in solutions such as body fluids.

Correct AnswerverifiedShow Answer

All isotopes of an element have the same number of electrons.

Correct AnswerverifiedShow Answer

Indicate the non-carbohydrate molecule.

Correct AnswerverifiedShow Answer

What type of fatty acid will have double bonds between carbon atoms within its carbon chain?

Correct AnswerverifiedShow Answer

Stearic acid and linolenic acid are both fatty acids built on chains of 18 carbon atoms. Based on their chemical composition, which of these is the saturated fatty acid?Stearic acid: 18 carbon atoms, 36 hydrogen atoms, 2 oxygen atomsLinolenic acid: 18 carbon atoms, 30 hydrogen atoms, 2 oxygen atoms

Correct AnswerverifiedShow Answer

The building blocks of __________ molecules are fatty acids and glycerol.

Correct AnswerverifiedShow Answer

A(n) __________ solution contains more hydroxide ions than hydrogen ions.

Correct AnswerverifiedShow Answer

Water is an example of a compound.

Correct AnswerverifiedShow Answer

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Within a phospholipid molecule, the phosphate "head" is and the fatty acid "tails" are .

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