Question 1

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.

Question 2

The purine ______ always hydrogen bonds with the pyrimidine ______ in double-stranded DNA.

Accepted Answer

A)  cytosine; guanine
B)  thymine; guanine
C)  guanine; cytosine
D)  adenine; guanine

Question 3

Which of the following represents a reversible reaction?

Accepted Answer

A)  A + B  →\rarr→  AB
B)  AB  →\rarr→  A + B
C)  AB + XY  ↔\leftrightarrow↔   AY + XB
D)  AB + XY  →\rarr→  AY + XB

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.

Question 5

Characteristics shared by all cells include

Accepted Answer

A)  a membrane serving as a cell boundary.
B)  the possession of genetic information.
C)  the presence of cellular fluid.
D)  All of the choices are correct.

Question 6

All proteins are enzymes.

Accepted Answer

A) True 
 B)False

Question 7

Most biochemical macromolecules are polymers, which are chains of ______.

Accepted Answer

A)  hydrophobic molecules
B)  hydrogen bonds
C)  repeating carbohydrates
D)  electrolytic molecules
E)  repeating monomers

Question 8

Electrons that participate in chemical bonding are typically located closest to the nucleus.

Accepted Answer

A) True 
 B)False

Question 9

The subatomic particles that surround the nucleus are the ______.

Accepted Answer

A)  protons and neutrons
B)  neutrons
C)  electrons
D)  protons
E)  protons and electrons

Question 10

All of the following are polysaccharides except

Accepted Answer

A)  dextran in some bacterial slime layers.
B)  agar used to make solid culture media.
C)  cellulose in certain cell walls.
D)  sterols in cell membranes.
E)  a cell's glycocalyx.

Question 11

The building blocks of an enzyme are ______.

Accepted Answer

A)  nucleotides
B)  monosaccharides
C)  amino acids
D)  glycerol and fatty acids
E)  phosphate, glycerol, and fatty acids

Question 12

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.

Question 13

The alpha ( α\alphaα )  helix is a type of _____ protein structure.

Accepted Answer

A)  primary
B)  secondary
C)  tertiary
D)  quaternary

Question 14

Water molecules are nonpolar molecules.

Accepted Answer

A) True 
 B)False

Question 15

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)  unsaturated
C)  polyunsaturated
D)  saturated

Question 16

One nucleotide contains one

Accepted Answer

A)  phosphate.
B)  pentose sugar.
C)  nitrogen base.
D)  All of the choices are correct.

Question 17

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 acids

Exam 2: The Chemistry of Biology

Characteristics shared by all cells include

Correct Answer
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All proteins are enzymes.

Correct Answer
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Which of the following represents a reversible reaction?

Correct Answer
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All of the following are polysaccharides except

Correct Answer
verified

Water molecules are nonpolar molecules.

Correct Answer
verified

The purine always hydrogen bonds with the pyrimidine in double-stranded DNA.

Correct Answer
verified

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 Answer
verified

Electrons that participate in chemical bonding are typically located closest to the nucleus.

Correct Answer
verified

The alpha ( $\alpha$ ) helix is a type of _____ protein structure.

Correct Answer
verified

Polar molecules are composed of covalently bonded

Correct Answer
verified

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

Correct Answer
verified

One nucleotide contains one

Correct Answer
verified

Polar molecules

Correct Answer
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The subatomic particles that surround the nucleus are the ______.

Correct Answer
verified

Most biochemical macromolecules are polymers, which are chains of ______.

Correct Answer
verified

The building blocks of an enzyme are ______.

Correct Answer
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All cells contain

Correct Answer
verified

Exam 2: The Chemistry of Biology

Characteristics shared by all cells include

Correct AnswerverifiedShow Answer

All proteins are enzymes.

Correct AnswerverifiedShow Answer

Which of the following represents a reversible reaction?

Correct AnswerverifiedShow Answer

All of the following are polysaccharides except

Correct AnswerverifiedShow Answer

Water molecules are nonpolar molecules.

Correct AnswerverifiedShow Answer

The purine ______ always hydrogen bonds with the pyrimidine ______ in double-stranded DNA.

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

Electrons that participate in chemical bonding are typically located closest to the nucleus.

Correct AnswerverifiedShow Answer

The alpha ( α\alphaα ) helix is a type of _____ protein structure.

Correct AnswerverifiedShow Answer

Polar molecules are composed of covalently bonded

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 AnswerverifiedShow Answer

One nucleotide contains one

Correct AnswerverifiedShow Answer

Polar molecules

Correct AnswerverifiedShow Answer

The subatomic particles that surround the nucleus are the ______.

Correct AnswerverifiedShow Answer

Most biochemical macromolecules are polymers, which are chains of ______.

Correct AnswerverifiedShow Answer

The building blocks of an enzyme are ______.

Correct AnswerverifiedShow Answer

All cells contain

Correct AnswerverifiedShow Answer

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Correct Answer
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The purine always hydrogen bonds with the pyrimidine in double-stranded DNA.

Correct Answer
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Correct Answer
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verified

The alpha ( $\alpha$ ) helix is a type of _____ protein structure.

Correct Answer
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Correct Answer
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