Question 1

What would be the valence number of electrons in the sulfur (S) atom? Its atomic number is 16.

Accepted Answer

A)   2
B)   6
C)   8
D)   16
E)   32F) C) and E)
G) A) and B)

Question 2

Anything that occupies space and has mass is called ______.

Accepted Answer

A)   matter
B)   energy
C)   living
D)   space
E)   atomicF) All of the above
G) A) and E) A

Question 3

What part of a phospholipid comprises the hydrophobic tail?

Accepted Answer

A)   Alcohol
B)   Hydroxyl
C)   Phosphate
D)   Glycerol
E)   Fatty acidsF) A) and B)
G) D) and E)

Question 4

Polar molecules

Accepted Answer

A)   always contain carbon.
B)   have an equal charge distribution.
C)   have an unequal charge distribution.
D)   always involve oxygen.
E)   are insoluble in water.F) B) and E)
G) A) and E)

Question 5

Select the statement that most accurately reflects the process of plant material digestion in humans.

Accepted Answer

A)   It requires the action of enzymes called kinases.
B)   It is linked to the digestion of glycogen.
C)   It is a process that is dependent upon enzyme (cellulase)  production by gut microbiota.
D)   It is a very efficient process the produces very little undigested material in feces.E) A) and B)
F) A) and C)

Question 6

Covalent bonds

Accepted Answer

A)   result from gaining electrons.
B)   are always nonpolar.
C)   result from losing electrons.
D)   are always polar.
E)   result from sharing electrons.F) A) and D)
G) A) and E)

Question 7

All proteins are enzymes.

Accepted Answer

A) True 
 B)False

Question 8

Atoms that gain or lose electrons become charged particles called ______.

Accepted Answer

A)   ions
B)   isotopes
C)   anions
D)   cationsE) B) and D)
F) All of the above

Question 9

Polar molecules are composed of covalently bonded

Accepted Answer

A)   carbon atoms.
B)   ions.
C)   identical atoms.
D)   atoms of identical electronegativity.
E)   atoms of different electronegativity.F) B) and C)
G) A) and E)

Question 10

A student forgot to label a beaker containing a DNA solution and a beaker containing a glucose solution.If chemical analysis was performed to identify the contents of each beaker,which of the following would be found in the beaker of DNA but not in the beaker with glucose?

Accepted Answer

A)   Nitrogen and phosphorus
B)   Carbon atoms
C)   Hydrogen and oxygen atoms
D)   Fatty acids
E)   Amino acidsF) A) and D)
G) A) and C)

Question 11

A reaction where an electron is lost is called ______.

Accepted Answer

A)   oxidation
B)   reduction
C)   ionization
D)   decomposition
E)   dissolutionF) A) and D)
G) None of the above

Question 12

Water molecules are nonpolar molecules.

Accepted Answer

A) True 
 B)False

Question 13

Which of the following is not a pyrimidine?

Accepted Answer

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

Question 14

All cells contain

Accepted Answer

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

Question 15

The most important outcome of polypeptide intrachain bonding and folding is the unique shape of the protein.

Accepted Answer

A) True 
 B)False

Question 16

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

Accepted Answer

A) True 
 B)False

Question 17

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

Accepted Answer

A)   algae
B)   some fungi
C)   green plants
D)   animalsE) A) and D)
F) A) and C) D

Question 18

The lipid group that serves as energy storage molecules is the ______.

Accepted Answer

A)   triglycerides
B)   prostaglandins
C)   steroids
D)   phospholipids
E)   waxesF) C) and D)
G) A) and B)

Question 19

Cations are

Accepted Answer

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

Question 20

If solution A has a lower pH compared to solution B,then solution A is more acidic than solution B.

Accepted Answer

A) True 
 B)False

Exam 2: The Chemistry of Biology

What would be the valence number of electrons in the sulfur (S) atom? Its atomic number is 16.

Correct AnswerverifiedShow Answer

Anything that occupies space and has mass is called ______.

Correct AnswerverifiedA

What part of a phospholipid comprises the hydrophobic tail?

Correct AnswerverifiedShow Answer

Polar molecules

Correct AnswerverifiedShow Answer

Select the statement that most accurately reflects the process of plant material digestion in humans.

Correct AnswerverifiedShow Answer

Covalent bonds

Correct AnswerverifiedShow Answer

All proteins are enzymes.

Correct AnswerverifiedShow Answer

Atoms that gain or lose electrons become charged particles called ______.

Correct AnswerverifiedShow Answer

Polar molecules are composed of covalently bonded

Correct AnswerverifiedShow Answer

A student forgot to label a beaker containing a DNA solution and a beaker containing a glucose solution.If chemical analysis was performed to identify the contents of each beaker,which of the following would be found in the beaker of DNA but not in the beaker with glucose?

Correct AnswerverifiedShow Answer

A reaction where an electron is lost is called ______.

Correct AnswerverifiedShow Answer

Water molecules are nonpolar molecules.

Correct AnswerverifiedShow Answer

Which of the following is not a pyrimidine?

Correct AnswerverifiedA

All cells contain

Correct AnswerverifiedShow Answer

The most important outcome of polypeptide intrachain bonding and folding is the unique shape of the protein.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedD

The lipid group that serves as energy storage molecules is the ______.

Correct AnswerverifiedShow Answer

Cations are

Correct AnswerverifiedShow Answer

If solution A has a lower pH compared to solution B,then solution A is more acidic than solution B.

Correct AnswerverifiedShow Answer

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