Question 1

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

Accepted Answer

A)   cations
B)   anions
C)   isotopes
D)   ionsE) A) and B)
F) A) and C)

Question 2

All of the following are lipids except ______.

Accepted Answer

A)   triglyceride
B)   wax
C)   phospholipid
D)   starch
E)   cholesterolF) A) and B)
G) A) and C)

Question 3

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

Question 4

A capillary tube is used to acquire a small blood sample for CBC (complete blood count)  analysis. Suction is not required to transfer the blood from the ?ngertip prick to the tube in part due to _______.

Accepted Answer

A)   covalent bonding between the water molecules
B)   cohesive forces between the glass particles of the tube and the water molecules
C)   adhesive forces between the water molecules and the glass particles of the tube
D)   ionic bonding between the water moleculesE) A) and B)
F) None of the above

Question 5

ATP is best described as _______.

Accepted Answer

A)   an electron carrier
B)   a double helix
C)   the energy molecule of cells
D)   an enzymeE) A) and B)
F) None of the above

Question 6

Which of the following functional groups is mismatched to the organic compound in which it is typically found?

Accepted Answer

A)   Phosphate - carbohydrates
B)   Sulfhydryl - proteins
C)   Hydroxyl - alcohols
D)   Amino - proteins
E)   Carboxyl - fatty acidsF) C) and E)
G) All of the above

Question 7

Polar molecules are composed of covalently bonded _______.

Accepted Answer

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

Question 8

Anything that occupies space and has mass is called ______.

Accepted Answer

A)   matter
B)   living
C)   energy
D)   atomic
E)   spaceF) A) and C)
G) A) and E)

Question 9

NASA has published a list of criteria for identifying fossil bacteria in samples from Mars, as part of a search for evidence of life. Which of the following is good evidence for the presence of bacterial cells?

Accepted Answer

A)   Three-dimensional organization of cells in a starburst pattern
B)   Absence of carbon in the material
C)   Cell size of 0.5 to 2 microns
D)   No evidence of water in the surrounding mineralE) None of the above
F) B) and D)

Question 10

A fat is called _______ if all carbons of the fatty acid chain are single-bonded to 2 other carbons and 2 hydrogens.

Accepted Answer

A)   monounsaturated
B)   saturated
C)   unsaturated
D)   polyunsaturatedE) A) and B)
F) A) and D) B

Question 11

Which of the following is not true about enzymes?

Accepted Answer

A)   Enzymes participate in the cell's chemical reactions.
B)   Enzymes are found in all cells.
C)   Enzymes are catalysts.
D)   Enzymes have high-energy bonds between phosphates.
E)   Enzymes can be denaturated by heat and other agents.F) A) and E)
G) None of the above

Question 12

Protons and neutrons make up the atom's central core, which is referred to as its ______.

Accepted Answer

A)   valence number
B)   nucleus
C)   isotope
D)   center of gravityE) A) and B)
F) All of the above

Question 13

An atom has gained an electron; it has been ______.

Accepted Answer

A)   deionized
B)   oxidized
C)   reduced
D)   neutralized
E)   ionizedF) B) and C)
G) C) and D) C

Question 14

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

Accepted Answer

A)   has a higher pH
B)   has no OH- ions
C)   is more basic
D)   has more H+ ionsE) A) and C)
F) All of the above

Question 15

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) A) and B)
G) D) and E)

Question 16

What part of a phospholipid comprises the hydrophobic tail?

Accepted Answer

A)   Fatty acids
B)   Hydroxyl
C)   Glycerol
D)   Phosphate
E)   AlcoholF) A) and B)
G) None of the above A

Question 17

Two or more atoms bonded together are called a(n)  ______.

Accepted Answer

A)   electrolyte
B)   molecule
C)   ion
D)   element
E)   isotopeF) A) and E)
G) B) and E)

Question 18

Polar molecules _______.

Accepted Answer

A)   have an unequal charge distribution
B)   always contain carbon
C)   always involve oxygen
D)   have an equal charge distribution
E)   are insoluble in waterF) All of the above
G) A) and B)

Question 19

An amino acid contains all of the following except a/an ______.

Accepted Answer

A)   carboxyl group
B)   variable R group
C)   amino group
D)   α carbon
E)   phosphateF) B) and E)
G) C) and D)

Question 20

Which of the following statements is incorrect regarding protein structure?

Accepted Answer

A)   Proteins, such as antibodies that are comprised of multiple polypeptide chains, have quaternary structure.
B)   The folding of a protein to form its active site creates its tertiary structure.
C)   Beta-pleated sheets are a type of protein secondary structure.
D)   The interaction between various R groups of amino acids determines the primary structure of a protein.E) B) and C)
F) B) and D)

Exam 2: The Chemistry of Biology

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

Correct AnswerverifiedShow Answer

All of the following are lipids except ______.

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 capillary tube is used to acquire a small blood sample for CBC (complete blood count) analysis. Suction is not required to transfer the blood from the ?ngertip prick to the tube in part due to _______.

Correct AnswerverifiedShow Answer

ATP is best described as _______.

Correct AnswerverifiedShow Answer

Which of the following functional groups is mismatched to the organic compound in which it is typically found?

Correct AnswerverifiedShow Answer

Polar molecules are composed of covalently bonded _______.

Correct AnswerverifiedShow Answer

Anything that occupies space and has mass is called ______.

Correct AnswerverifiedShow Answer

NASA has published a list of criteria for identifying fossil bacteria in samples from Mars, as part of a search for evidence of life. Which of the following is good evidence for the presence of bacterial cells?

Correct AnswerverifiedShow Answer

A fat is called _______ if all carbons of the fatty acid chain are single-bonded to 2 other carbons and 2 hydrogens.

Correct AnswerverifiedB

Which of the following is not true about enzymes?

Correct AnswerverifiedShow Answer

Protons and neutrons make up the atom's central core, which is referred to as its ______.

Correct AnswerverifiedShow Answer

An atom has gained an electron; it has been ______.

Correct AnswerverifiedC

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

What part of a phospholipid comprises the hydrophobic tail?

Correct AnswerverifiedA

Two or more atoms bonded together are called a(n) ______.

Correct AnswerverifiedShow Answer

Polar molecules _______.

Correct AnswerverifiedShow Answer

An amino acid contains all of the following except a/an ______.

Correct AnswerverifiedShow Answer

Which of the following statements is incorrect regarding protein structure?

Correct AnswerverifiedShow Answer

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B

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C

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A

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