Question 1

Compared to a solution of pH 9, a solution of pH 7 is _______.

Accepted Answer

A)   2 times more acidic
B)   20 times more acidic
C)   100 times more basic
D)   20 times more basic
E)   100 times more acidicF) All of the above
G) C) and D)

Question 2

The subatomic particles that surround the nucleus are the ______.

Accepted Answer

A)   protons and neutrons
B)   electrons
C)   protons and electrons
D)   protons
E)   neutronsF) None of the above
G) C) and D)

Question 3

Which of the following represents a synthesis reaction?

Accepted Answer

A)   AB + XY 	?AY + XB
B)   AB + XY ? AY + XB
C)   AB ? A + B
D)   A + B ? ABE) C) and D)
F) All of the above

Question 4

Which of the following is not a pyrimidine?

Accepted Answer

A)   Adenine
B)   Cytosine
C)   Thymine
D)   UracilE) C) and D)
F) B) and D)

Question 5

Organic chemicals always have a basic framework of the element _____ bonded to other atoms.

Accepted Answer

A)   hydrogen
B)   oxygen
C)   carbon
D)   nitrogen
E)   phosphorousF) B) and D)
G) B) and E)

Question 6

Cations are _______.

Accepted Answer

A)   atoms that have gained neutrons
B)   charged subatomic particles
C)   atoms that have gained electrons
D)   atoms without protons
E)   capable of forming ionic bonds with anionsF) A) and B)
G) A) and C)

Question 7

Purines and pyrimidines are components in the building block units of all ______.

Accepted Answer

A)   amino acids
B)   carbohydrates
C)   enzymes
D)   nucleic acids
E)   polysaccharidesF) D) and E)
G) All of the above

Question 8

The electrons of an atom are _______.

Accepted Answer

A)   always equal to the number of protons
B)   used to determine the atomic number
C)   carrying a positive charge
D)   always in full orbitals
E)   used to determine the atomic weightF) C) and D)
G) A) and B)

Question 9

Water molecules are nonpolar molecules.

Accepted Answer

A) True 
 B)False

Question 10

The electrons of an atom are _______.

Accepted Answer

A)   found in the nucleus
B)   used to determine atomic number
C)   positively charged
D)   moving in pathways called orbitals
E)   always equal to the number of neutrons in an atomF) B) and D)
G) C) and D)

Question 11

One technique for staining bacteria for viewing under the microscope is called the Gram stain. In this technique, alcohol is used as a decolorizer because it degrades the outer membrane found in some bacteria. What chemical component of the cell does alcohol affect?

Accepted Answer

A)   Lipid
B)   Protein
C)   Carbohydrate
D)   Nucleic acidsE) B) and C)
F) B) and D)

Question 12

A covalent bond is formed between an anion and a cation.

Accepted Answer

A) True 
 B)False

Question 13

Ionic compounds _______.

Accepted Answer

A)   are hydrophilic
B)   are basic in solution
C)   are hydrophobic
D)   always form salts in solution
E)   are acidic in solutionF) A) and B)
G) A) and C)

Question 14

Nucleic acids have primary, secondary, tertiary, and quaternary levels of organization.

Accepted Answer

A) True 
 B)False

Question 15

All cells contain _______.

Accepted Answer

A)   mitochondria to generate ATP
B)   ribosomes for protein synthesis
C)   organelles for compartmentalization
D)   cell walls made of cellulose
E)   uracil in their DNAF) B) and D)
G) A) and D)

Question 16

The only part of an amino acid that differs from other amino acids is its R group.

Accepted Answer

A) True 
 B)False

Question 17

What is the maximum number of electrons in the second energy shell of an atom?

Accepted Answer

A)   2
B)   4
C)   8
D)   18
E)   32F) None of the above
G) A) and B)

Question 18

The valence number is the _______.

Accepted Answer

A)   atomic weight
B)   number of electrons in the innermost orbital
C)   number of neutrons
D)   number of protons
E)   number of electrons in the outermost orbitalF) D) and E)
G) None of the above

Question 19

Starch is the primary storage food for all of the following except ______.

Accepted Answer

A)   animals
B)   algae
C)   some fungi
D)   green plantsE) B) and D)
F) B) and C)

Question 20

All of the following pertain to the atom Carbon-14 except it _______.

Accepted Answer

A)   has 6 electrons
B)   is an isotope of carbon
C)   has 14 neutrons
D)   has 6 protonsE) A) and D)
F) None of the above

Exam 2: The Chemistry of Biology

Ionic compounds _______.

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The electrons of an atom are _______.

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All of the following pertain to the atom Carbon-14 except it _______.

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What is the maximum number of electrons in the second energy shell of an atom?

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Starch is the primary storage food for all of the following except ______.

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All cells contain _______.

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Which of the following is not a pyrimidine?

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The electrons of an atom are _______.

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Nucleic acids have primary, secondary, tertiary, and quaternary levels of organization.

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The subatomic particles that surround the nucleus are the ______.

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Water molecules are nonpolar molecules.

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The valence number is the _______.

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Which of the following represents a synthesis reaction?

Correct AnswerverifiedShow Answer

Purines and pyrimidines are components in the building block units of all ______.

Correct AnswerverifiedShow Answer

Organic chemicals always have a basic framework of the element _____ bonded to other atoms.

Correct AnswerverifiedShow Answer

The only part of an amino acid that differs from other amino acids is its R group.

Correct AnswerverifiedShow Answer

A covalent bond is formed between an anion and a cation.

Correct AnswerverifiedShow Answer

Cations are _______.

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One technique for staining bacteria for viewing under the microscope is called the Gram stain. In this technique, alcohol is used as a decolorizer because it degrades the outer membrane found in some bacteria. What chemical component of the cell does alcohol affect?

Correct AnswerverifiedShow Answer

Compared to a solution of pH 9, a solution of pH 7 is _______.

Correct AnswerverifiedShow Answer

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