Question 1

The nucleus of an atom consists of

Accepted Answer

A)   electrons.
B)   protons.
C)   neutrons.
D)   protons + neutrons.
E)   protons + electrons.F) A) and D)
G) C) and D)

Question 2

AB → A + B is to decomposition as A + B → AB is to

Accepted Answer

A)   exchange.
B)   synthesis.
C)   combustion.
D)   replacement.
E)   metabolism.F) A) and B)
G) A) and C)

Question 3

When electrons are transferred from one atom to another, and the two atoms unite as a result of the opposite charges,

Accepted Answer

A)   an ion is formed.
B)   a free electron is formed.
C)   a hydrogen bond is formed.
D)   an ionic bond is formed.
E)   a covalent bond is formed.F) C) and D)
G) A) and B)

Question 4

Electrons whirl around the center of the atom at high speed, forming a(n) ________.

Accepted Answer

The answer of Electrons whirl around the center of the...

Question 5

An example of an organic substance is

Accepted Answer

A)   sucrose.
B)   carbonic acid.
C)   sodium chloride.
D)   oxygen.
E)   carbon dioxide.F) B) and D)
G) A) and E)

Question 6

The most important metabolic fuel molecule in the body is

Accepted Answer

A)   sucrose.
B)   caffeine.
C)   protein.
D)   vitamins.
E)   glucose.F) A) and E)
G) C) and D)

Question 7

Molecules that do not readily dissolve in water are called ________.

Accepted Answer

The answer of Molecules that do not readily dissolve in...

Question 8

All fatty acids contain a functional group at one end called the ________.

Accepted Answer

carboxylic...

Question 9

During ionization, water molecules disrupt the ionic bonds of a salt to produce a mixture of ions. These ions can carry a current and so are called

Accepted Answer

A)   cations.
B)   anions.
C)   acids.
D)   electrolytes.
E)   counter ions.F) A) and B)
G) A) and C)

Question 10

A(n) ________ is a homogeneous mixture containing a solvent and a solute.

Accepted Answer

The answer of A(n) ________ is a homogeneous mixture containing...

Question 11

The purines found in DNA are ________ and ________.

Accepted Answer

The answer of The purines found in DNA are ________...

Question 12

The hydrolysis of ATP yields ADP, phosphate ion, and ________.

Accepted Answer

The answer of The hydrolysis of ATP yields ADP, phosphate...

Question 13

When atoms complete their outer electron shell by sharing electrons, they form

Accepted Answer

A)   ionic bonds.
B)   covalent bonds.
C)   hydrogen bonds.
D)   anions.
E)   cations.F) A) and E)
G) A) and C)

Question 14

An example of an inorganic substance is (are)

Accepted Answer

A)   fructose.
B)   water.
C)   glycerol.
D)   carbon dioxide.
E)   both water and carbon dioxide.F) A) and B)
G) B) and D)

Question 15

A dust particle floating on a water surface illustrates

Accepted Answer

A)   surface tension.
B)   chemical tension.
C)   static electricity.
D)   heat capacity.
E)   hydrophilic attraction.F) All of the above
G) A) and D)

Question 16

Nonpolar organic molecules are good examples of

Accepted Answer

A)   electrolytes.
B)   molecules that will dissociate when placed into water.
C)   hydrophobic compounds.
D)   hydrophilic compounds.
E)   solutes.F) B) and E)
G) C) and D)

Question 17

Compounds that can be synthesized or broken down by chemical reactions inside the body are called

Accepted Answer

A)   inorganic compounds.
B)   organic compounds.
C)   nutrients.
D)   metabolites.
E)   enzymes.F) D) and E)
G) A) and E)

Question 18

Carbohydrates, lipids, and proteins are classified as

Accepted Answer

A)   organic molecules.
B)   inorganic molecules.
C)   acids.
D)   salts.
E)   bases.F) C) and D)
G) A) and D)

Question 19

Atoms of the same element whose nuclei contain the same number of protons, but different numbers of neutrons, are called ________.

Accepted Answer

The answer of Atoms of the same element whose nuclei...

Question 20

Which has the greater concentration of hydrogen ions, a substance with a pH of 5 or a substance with a pH of 4?

Accepted Answer

A)   A pH of 4 is greater.
B)   A pH of 5 is greater.
C)   They are both equal; 4 and 5 are relative values.
D)   pH 9, if you mixed the solutions.
E)   Neither, pH has nothing to do with hydrogen ion concentration.F) B) and C)
G) A) and B)

Exam 2: Chemical Level of Organization

Which has the greater concentration of hydrogen ions, a substance with a pH of 5 or a substance with a pH of 4?

Correct AnswerverifiedShow Answer

An example of an organic substance is

Correct AnswerverifiedShow Answer

All fatty acids contain a functional group at one end called the ________.

Correct Answerverifiedcarboxylic...View AnswerShow Answer

When electrons are transferred from one atom to another, and the two atoms unite as a result of the opposite charges,

Correct AnswerverifiedShow Answer

Compounds that can be synthesized or broken down by chemical reactions inside the body are called

Correct AnswerverifiedShow Answer

When atoms complete their outer electron shell by sharing electrons, they form

Correct AnswerverifiedShow Answer

During ionization, water molecules disrupt the ionic bonds of a salt to produce a mixture of ions. These ions can carry a current and so are called

Correct AnswerverifiedShow Answer

A dust particle floating on a water surface illustrates

Correct AnswerverifiedShow Answer

Electrons whirl around the center of the atom at high speed, forming a(n) ________.

Correct AnswerverifiedShow Answer

An example of an inorganic substance is (are)

Correct AnswerverifiedShow Answer

A(n) ________ is a homogeneous mixture containing a solvent and a solute.

Correct AnswerverifiedShow Answer

Molecules that do not readily dissolve in water are called ________.

Correct AnswerverifiedShow Answer

Carbohydrates, lipids, and proteins are classified as

Correct AnswerverifiedShow Answer

Atoms of the same element whose nuclei contain the same number of protons, but different numbers of neutrons, are called ________.

Correct AnswerverifiedShow Answer

Nonpolar organic molecules are good examples of

Correct AnswerverifiedShow Answer

The nucleus of an atom consists of

Correct AnswerverifiedShow Answer

The most important metabolic fuel molecule in the body is

Correct AnswerverifiedShow Answer

The hydrolysis of ATP yields ADP, phosphate ion, and ________.

Correct AnswerverifiedShow Answer

The purines found in DNA are ________ and ________.

Correct AnswerverifiedShow Answer

AB → A + B is to decomposition as A + B → AB is to

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
carboxylic...
View Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

The purines found in DNA are and .

Correct Answer
verified

Correct Answer
verified