Question 1

Radioisotopes contain

Accepted Answer

A)  an insufficient number of neutrons.
B)  an insufficient number of electrons.
C)  an insufficient number of protons.
D)  an excess of protons.
E)  an excess of neutrons.F) C) and D)
G) None of the above E

Question 2

Ionic bonds involve:

Accepted Answer

A)  electrostatic interactions between anions and cations.
B)  the sharing of electrons between two atoms of the same element.
C)  the attraction between water and salts.
D)  the release of protons by negatively charged particles.E) None of the above
F) All of the above

Question 3

Given that the mass of an oxygen atom is 16 amu and that of a hydrogen atom is 1 amu,1 mole of water would be equal to

Accepted Answer

A)  17 amu.
B)  18 amu.
C)  15 grams.
D)  18 grams.
E)  6.02 *1023grams.F) A) and B)
G) A) and C)

Question 4

The addition of a buffer to liquid such as blood with a pH of 7.4 causes the pH to drop to 7.0 (chemically neutral).

Accepted Answer

A) True 
 B)False  False

Question 5

FAD and NAD+are examples of nucleotides.

Accepted Answer

A) True 
 B)False

Question 6

In a sample of distilled water,a water molecule that has picked up an extra hydrogen ion is called a(n)

Accepted Answer

A)  amphipathic macromolecule.
B)  hydroxide ion.
C)  hydronium ion.
D)  proteinaceous water molecule.E) C) and D)
F) B) and D)

Question 7

How many osmoles are in a solution of 1M NaOH

Accepted Answer

A)  1 osm
B)  2 osm
C)  3 osm
D)  4 osmE) C) and D)
F) A) and D)

Question 8

When a large biological molecule is digested by the addition of water,the reaction is termed _________.

Accepted Answer

The answer of When a large biological molecule is digested...

Question 9

Anything that has mass and occupies space is considered to be ________.

Accepted Answer

The answer of Anything that has mass and occupies space...

Question 10

Water is the main solute of the body.

Accepted Answer

A) True 
 B)False

Question 11

When dehydration synthesis occurs between two amino acids,a covalent bond called a _________ bond forms between them.

Accepted Answer

The answer of When dehydration synthesis occurs between two amino...

Question 12

Steroid hormones are nonpolar molecules that travel in the blood.Explain how such molecules interact with the water of the plasma.

Accepted Answer

Because they are nonpolar,steroids are h...

Question 13

Polar R groups of closely positioned amino acids often enter into _________ with each other,which helps give a protein its three-dimensional shape.

Accepted Answer

A)  hydrophobic interactions
B)  ionic bonds
C)  hydrogen bonds
D)  van der Waal repulsions
E)  sulfur-carbon bondsF) A) and E)
G) D) and E)

Question 14

An element's atomic number is determined by the number of __________ in one atom of that element.

Accepted Answer

A)  protons
B)  nuclei
C)  electrons
D)  neutrons
E)  atomic mass unitsF) A) and D)
G) B) and E)

Question 15

Nucleic acids are made up of

Accepted Answer

A)  nucleotides joined by covalent,phosphodiester bonds.
B)  nitrogenous bases joined by ionic,disulfide bonds.
C)  ribose sugars joined by intermolecular,hydrogen bonds.
D)  proteins and sugars joined by polar,covalent,double bonds.E) B) and C)
F) None of the above

Question 16

Within the periodic table,elements are organized consecutively by

Accepted Answer

A)  atomic mass within columns.
B)  atomic mass within rows.
C)  atomic number within columns.
D)  atomic number within rows.E) A) and D)
F) All of the above

Question 17

Which of the following has the smallest mass

Accepted Answer

A)  An electron
B)  An atomic nucleus
C)  A proton
D)  A neutronE) None of the above
F) A) and B) A

Question 18

The higher the concentration of H+is,the lower the pH is.

Accepted Answer

A) True 
 B)False

Question 19

Water contains two hydrogen atoms bound to one oxygen atom;"H2O" is therefore water's

Accepted Answer

A)  molecular formula.
B)  ionic compound.
C)  isotope ratio.
D)  stochastic isomer.E) A) and B)
F) B) and D)

Question 20

Like most functional groups,carboxyl groups are

Accepted Answer

A)  nonpolar and therefore increase a biomolecule's solubility in water.
B)  nonpolar and therefore decrease a biomolecule's solubility in water.
C)  polar and therefore increase a biomolecule's solubility in water.
D)  polar and therefore decrease a biomolecule's solubility in water.E) All of the above
F) A) and B)

Exam 2: Atoms,Ions,and Molecules

Radioisotopes contain

Correct AnswerverifiedE

Ionic bonds involve:

Correct AnswerverifiedShow Answer

Given that the mass of an oxygen atom is 16 amu and that of a hydrogen atom is 1 amu,1 mole of water would be equal to

Correct AnswerverifiedShow Answer

The addition of a buffer to liquid such as blood with a pH of 7.4 causes the pH to drop to 7.0 (chemically neutral).

Correct AnswerverifiedFalse

FAD and NAD+are examples of nucleotides.

Correct AnswerverifiedShow Answer

In a sample of distilled water,a water molecule that has picked up an extra hydrogen ion is called a(n)

Correct AnswerverifiedShow Answer

How many osmoles are in a solution of 1M NaOH

Correct AnswerverifiedShow Answer

When a large biological molecule is digested by the addition of water,the reaction is termed _________.

Correct AnswerverifiedShow Answer

Anything that has mass and occupies space is considered to be ________.

Correct AnswerverifiedShow Answer

Water is the main solute of the body.

Correct AnswerverifiedShow Answer

When dehydration synthesis occurs between two amino acids,a covalent bond called a _________ bond forms between them.

Correct AnswerverifiedShow Answer

Steroid hormones are nonpolar molecules that travel in the blood.Explain how such molecules interact with the water of the plasma.

Correct AnswerverifiedBecause they are nonpolar,steroids are h...View AnswerShow Answer

Polar R groups of closely positioned amino acids often enter into _________ with each other,which helps give a protein its three-dimensional shape.

Correct AnswerverifiedShow Answer

An element's atomic number is determined by the number of __________ in one atom of that element.

Correct AnswerverifiedShow Answer

Nucleic acids are made up of

Correct AnswerverifiedShow Answer

Within the periodic table,elements are organized consecutively by

Correct AnswerverifiedShow Answer

Which of the following has the smallest mass

Correct AnswerverifiedA

The higher the concentration of H+is,the lower the pH is.

Correct AnswerverifiedShow Answer

Water contains two hydrogen atoms bound to one oxygen atom;"H2O" is therefore water's

Correct AnswerverifiedShow Answer

Like most functional groups,carboxyl groups are

Correct AnswerverifiedShow Answer

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E

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False

FAD and NAD⁺are examples of nucleotides.

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Because they are nonpolar,steroids are h...
View Answer

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A

The higher the concentration of H⁺is,the lower the pH is.

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Water contains two hydrogen atoms bound to one oxygen atom;"H₂O" is therefore water's

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