Question 1

Which functional group(s)  is/are associated with a dehydration reaction?

Accepted Answer

A)   OH
B)   SH
C)   OH and NH
D)   SH and OH
E)   COOH and SHF) B) and D)
G) A) and C)

Question 2

When an ionic bond forms, electrons are

Accepted Answer

A)   lost from both atoms.
B)   gained by both atoms.
C)   shared equally by both atoms.
D)   totally lost from the paired atoms.
E)   transferred from one atom to another.F) A) and E)
G) None of the above

Question 3

Which of the following types of lipids is the most abundant constituent of cell membranes?

Accepted Answer

A)   cholesterol
B)   phospholipid
C)   triglyceride
D)   neutral fat
E)   fatF) A) and B)
G) A) and C)

Question 4

Two molecules of glucose combine to form a disaccharide molecule during a(n)  ________ reaction.

Accepted Answer

A)   dehydration
B)   hydrolysis
C)   hydrogen bond
D)   ionic bond
E)   inertF) C) and D)
G) A) and D)

Question 5

Which of the following sequences correctly lists the bonds in order of strongest to weakest?

Accepted Answer

A)   double covalent - single covalent - ionic - hydrogen
B)   single covalent - double covalent - ionic - hydrogen
C)   ionic - double covalent - single covalent - hydrogen
D)   hydrogen - double covalent - single covalent - ionic
E)   double covalent - single covalent - hydrogen - ionicF) A) and D)
G) All of the above

Question 6

The molecular structure shown here is

Accepted Answer

A)   a glucose molecule.
B)   a fatty acid molecule.
C)   a glycerol molecule.
D)   a protein molecule.
E)   an amino acid.F) D) and E)
G) A) and B)

Question 7

Potassium, a metal with one electron in the outermost shell, will react with how many chlorine atoms? (Chlorine is a nonmetal with seven electrons in the outermost shell.)

Accepted Answer

A)   5
B)   7
C)   1
D)   2
E)   3F) B) and E)
G) None of the above

Question 8

In water, a weak hydrogen bond occurs between a hydrogen in one molecule and

Accepted Answer

A)   an oxygen atom in the same molecule.
B)   an oxygen atom in a different molecule.
C)   a hydrogen atom in the same molecule.
D)   a hydrogen atom in a different molecule.
E)   either hydrogen and oxygen atoms of different molecules.F) B) and E)
G) C) and D)

Question 9

Hemoglobin is a protein composed of two pairs of polypeptide chains. What is the highest level of protein structure represented by hemoglobin?

Accepted Answer

A)   primary
B)   secondary
C)   tertiary
D)   quaternary
E)   molecularF) B) and D)
G) B) and C)

Question 10

Which of the following statements about hydrogen bonding is correct?

Accepted Answer

A)   Hydrogen bonding occurs only between water molecules.
B)   Hydrogen bonds are difficult to break.
C)   Hydrogen bonding can occur between different molecules or within the same molecule.
D)   Hydrogen bonding is only common among small molecules.
E)   Hydrogen bonding is usually represented by a solid line between atoms.F) C) and D)
G) C) and E)

Question 11

Which of the following is an example of a compound?

Accepted Answer

A)   O2
B)   Cl
C)   H2
D)   C6H12O6
E)   Na+F) D) and E)
G) B) and C)

Question 12

Which of the following functional groups is present in amino acids?

Accepted Answer

A)   sulfhydryl
B)   amino
C)   carboxyl
D)   hydroxyl
E)   All of the answer choices are present in amino acids.F) A) and D)
G) B) and E)

Question 13

The proposed cause of CJD and kuru in humans, mad cow disease, and scrapie in sheep is a change in a brain protein. Disease victims appear to have a protein that should normally contain alpha helices but instead they have changed into a protein made of beta pleated sheets. The disease appears to spread when the abnormal protein comes into contact with the normal protein, causing it to become deformed. Which level of protein structure is associated with these diseases?

Accepted Answer

A)   primary
B)   secondary
C)   tertiary
D)   quaternary
E)   molecularF) B) and D)
G) C) and D)

Question 14

Buffers

Accepted Answer

A)   are strong acids or bases.
B)   keep the pH within normal limits.
C)   release large amounts of hydrogen ions (H+) .
D)   will only lower the pH.
E)   will only increase the pH.F) A) and B)
G) A) and C)

Question 15

To measure the activity of the human brain during certain thought processes, a short-lived radioactive sugar is injected in the carotid artery and is utilized by those cells that are most active. This shows up on a PET scan and demonstrates the detection of

Accepted Answer

A)   ionic bonds.
B)   high levels of radiation.
C)   covalent bonds.
D)   neutrons.
E)   isotopes.F) C) and D)
G) A) and E)

Question 16

Hydrolysis of a fat results in

Accepted Answer

A)   glycerol only.
B)   fatty acids only.
C)   glucose only.
D)   two monosaccharides.
E)   both glycerol and fatty acids.F) D) and E)
G) None of the above

Question 17

Glycogen is a

Accepted Answer

A)   monosaccharide used for quick energy.
B)   protein found in cell membranes.
C)   polysaccharide used to store glucose/energy.
D)   fat found in margarine.
E)   nucleic acid found in the nucleus of a cell.F) A) and B)
G) B) and D)

Question 18

What type of bond will connect the amino acids in a protein?

Accepted Answer

A)   peptide
B)   triple covalent
C)   polar covalent
D)   ionic
E)   double covalentF) A) and E)
G) D) and E)

Question 19

One carbon atom can form covalent bonds with up to ________ other atoms to form an organic molecule.

Accepted Answer

A)   2
B)   3
C)   4
D)   6
E)   8F) B) and D)
G) A) and B)

Exam 2: The Molecules of Cells

Which of the following statements about hydrogen bonding is correct?

Correct Answer
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One carbon atom can form covalent bonds with up to ________ other atoms to form an organic molecule.

Correct Answer
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Glycogen is a

Correct Answer
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Buffers

Correct Answer
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Which of the following sequences correctly lists the bonds in order of strongest to weakest?

Correct Answer
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What type of bond will connect the amino acids in a protein?

Correct Answer
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To measure the activity of the human brain during certain thought processes, a short-lived radioactive sugar is injected in the carotid artery and is utilized by those cells that are most active. This shows up on a PET scan and demonstrates the detection of

Correct Answer
verified

Which functional group(s) is/are associated with a dehydration reaction?

Correct Answer
verified

Hydrolysis of a fat results in

Correct Answer
verified

Correct Answer
verified

Two molecules of glucose combine to form a disaccharide molecule during a(n) ________ reaction.

Correct Answer
verified

Which of the following is an example of a compound?

Correct Answer
verified

Potassium, a metal with one electron in the outermost shell, will react with how many chlorine atoms? (Chlorine is a nonmetal with seven electrons in the outermost shell.)

Correct Answer
verified

Hemoglobin is a protein composed of two pairs of polypeptide chains. What is the highest level of protein structure represented by hemoglobin?

Correct Answer
verified

Which of the following types of lipids is the most abundant constituent of cell membranes?

Correct Answer
verified

When an ionic bond forms, electrons are

Correct Answer
verified

The molecular structure shown here is

Correct Answer
verified

In water, a weak hydrogen bond occurs between a hydrogen in one molecule and

Correct Answer
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Which of the following functional groups is present in amino acids?

Correct Answer
verified

Exam 2: The Molecules of Cells

Which of the following statements about hydrogen bonding is correct?

Correct AnswerverifiedShow Answer

One carbon atom can form covalent bonds with up to ________ other atoms to form an organic molecule.

Correct AnswerverifiedShow Answer

Glycogen is a

Correct AnswerverifiedShow Answer

Buffers

Correct AnswerverifiedShow Answer

Which of the following sequences correctly lists the bonds in order of strongest to weakest?

Correct AnswerverifiedShow Answer

What type of bond will connect the amino acids in a protein?

Correct AnswerverifiedShow Answer

To measure the activity of the human brain during certain thought processes, a short-lived radioactive sugar is injected in the carotid artery and is utilized by those cells that are most active. This shows up on a PET scan and demonstrates the detection of

Correct AnswerverifiedShow Answer

Which functional group(s) is/are associated with a dehydration reaction?

Correct AnswerverifiedShow Answer

Hydrolysis of a fat results in

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Two molecules of glucose combine to form a disaccharide molecule during a(n) ________ reaction.

Correct AnswerverifiedShow Answer

Which of the following is an example of a compound?

Correct AnswerverifiedShow Answer

Potassium, a metal with one electron in the outermost shell, will react with how many chlorine atoms? (Chlorine is a nonmetal with seven electrons in the outermost shell.)

Correct AnswerverifiedShow Answer

Hemoglobin is a protein composed of two pairs of polypeptide chains. What is the highest level of protein structure represented by hemoglobin?

Correct AnswerverifiedShow Answer

Which of the following types of lipids is the most abundant constituent of cell membranes?

Correct AnswerverifiedShow Answer

When an ionic bond forms, electrons are

Correct AnswerverifiedShow Answer

The molecular structure shown here is

Correct AnswerverifiedShow Answer

In water, a weak hydrogen bond occurs between a hydrogen in one molecule and

Correct AnswerverifiedShow Answer

Which of the following functional groups is present in amino acids?

Correct AnswerverifiedShow Answer

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