Question 1

Which function has the least priority for protein?

Accepted Answer

A)   Energy storage
B)   Providing structure
C)   Muscle contraction
D)   Catalyzing reactions
E)   Regulating metabolismF) D) and E)
G) None of the above A

Question 2

Biochemists organize the variety in chemical structure by classifying molecules into functional groups. A functional group is a group of atoms that gives a family of molecules its characteristic chemical and physical properties.

Accepted Answer

A)   Both statements are true.
B)   Both statements are false.
C)   The first statement is true; the second is false.
D)   The first statement is false; the second is true.E) All of the above
F) None of the above A

Question 3

Saturated fatty acids are alkenes that contain one or more C=C (double)  bond. Unsaturated fatty acids, contain only one C=C bond.

Accepted Answer

A)   Both statements are true.
B)   Both statements are false.
C)   The first statement is true; the second is false.
D)   The first statement is false; the second is true.E) None of the above
F) B) and C)

Question 4

A biomolecule is a substance required by the body that must be supplied by an outside source. During metabolism, energy can be extracted from dietary carbohydrates, proteins, lipids and can be used to create biomolecules required for life.

Accepted Answer

A)   Both statements are true.
B)   Both statements are false.
C)   The first statement is true; the second is false.
D)   The first statement is false; the second is true.E) B) and C)
F) All of the above

Question 5

In metabolism, energy is extracted from glucose (C6H12O6)  and converted to carbon dioxide (CO2)  by which chemical reaction?

Accepted Answer

A)   Oxidation
B)   Reduction
C)   Hydrolysis
D)   CondensationE) A) and D)
F) B) and C)

Question 6

Each of the following is true of proteins except one. Which one is the exception?

Accepted Answer

A)   Proteins are composed of building blocks called amino acids.
B)   The classification of the 20 common amino acids is based on the structure of their amino group.
C)   The general structure of an amino acid varies considerably.
D)   Amino acids polymerize to form long chains called polypeptides.
E)   Amino acids contain strong covalent peptide bonds.F) B) and E)
G) B) and D)

Question 7

Antioxidants like vitamins C and E are added to unsaturated fats because antioxidants prevent rancidity associated with the oxidation during preparation of vegetable oils and margarines.

Accepted Answer

A)   Both the statement and the reason are correct and related.
B)   Both the statement and the reason are correct but are not related.
C)   The statement is correct, but the reason is not correct.
D)   The statement is not correct, but the reason is correct.
E)   Neither the statement nor the reason is correct.F) A) and B)
G) All of the above

Question 8

The biomolecules necessary for life are based on carbon because carbon has the ability to form glycosidic bonds to itself and many other atoms.

Accepted Answer

A)   Both the statement and the reason are correct and related.
B)   Both the statement and the reason are correct, but are not related.
C)   The statement is correct, but the reason is not correct.
D)   The statement is not correct, but the reason is correct.
E)   Neither the statement nor the reason is correct.F) D) and E)
G) A) and B)

Question 9

Fatty acids are structural components that are present in more complex lips, such as triglycerides (TGs) . Also referred to as triacylglycerols, TGs synthesize fatty acids.

Accepted Answer

A)   Both statements are true.
B)   Both statements are false.
C)   The first statement is true; the second is false.
D)   The first statement is false; the second is true.E) A) and B)
F) A) and C)

Question 10

Enzymes perform all the chemical reactions of metabolism involving degradation and biosynthesis of biomolecules required for life. Proteases, amylases, and lipases are coenzymes.

Accepted Answer

A)   Both statements are true.
B)   Both statements are false.
C)   The first statement is true; the second is false.
D)   The first statement is false; the second is true.E) C) and D)
F) A) and C)

Question 11

Cholesterol is the most abundant lipoprotein and is important to biological membranes. Cholesterol is also the precursor of steroid hormones, bile acids, and the lipid-soluble vitamin D.

Accepted Answer

A)   Both statements are true.
B)   Both statements are false.
C)   The first statement is true; the second is false.
D)   The first statement is false; the second is true.E) A) and B)
F) A) and C)

Question 12

Each of the following is a component of an amino acid except one. Which one is the exception?

Accepted Answer

A)   Carbon dioxide group (CO2) 
B)   Amino group (-NH3+) 
C)   Carboxyl group (-COO-) 
D)   Side chain (R group) E) B) and C)
F) A) and D)

Question 13

The biological function that plants use to make the carbohydrate animals can use for energy and oxygen is called:

Accepted Answer

A)   oxidation-reduction.
B)   condensation.
C)   hydrolysis.
D)   photosynthesis.E) B) and C)
F) All of the above

Question 14

During the Krebs cycle complete aerobic oxidation of glucose (C6H12O6)  produces each of the following except one. Which one is the exception?

Accepted Answer

A)   CO2
B)   H2O
C)   ATP
D)   Amino acidsE) A) and B)
F) A) and C)

Question 15

When the body's stores of energy are depleted, the pancreas becomes involved because gluconeogenesis can convert pyruvate into glucose for energy.

Accepted Answer

A)   Both the statement and the reason are correct and related.
B)   Both the statement and the reason are correct but are not related.
C)   The statement is correct, but the reason is not correct.
D)   The statement is not correct, but the reason is correct.
E)   Neither the statement nor the reason is correct.F) None of the above
G) B) and E)

Question 16

Each of the following is true of lipids except one. Which one is the exception?

Accepted Answer

A)   The catabolism of lipids is a major source of energy for the body.
B)   Lipids can by oxidized to produce more energy than carbohydrates or proteins.
C)   The hydrous nature of lipids make them retain water.
D)   Lipids can be stored in adipose tissue in unlimited amounts.E) A) and D)
F) All of the above

Question 17

In general, a condensation reaction creates a new molecule by:

Accepted Answer

A)   breaking a larger molecule into two smaller molecules.
B)   forming an ionic bond between a metal and a nonmetal ion.
C)   forming a bond between two smaller molecules.
D)   sharing two electrons between two nonmetals.E) A) and D)
F) None of the above

Question 18

Coenzymes are protein organic substances that assist enzymes in converting the substrate into a carbohydrate. Many vitamins are converted into biologically active coenzymes.

Accepted Answer

A)   Both statements are true.
B)   Both statements are false.
C)   The first statement is true; the second is false.
D)   The first statement is false; the second is true.E) All of the above
F) B) and D) D

Question 19

Each of the following is a characteristic or function of lipids except one. Which one is the exception?

Accepted Answer

A)   Lipids are involved in energy metabolism and storage.
B)   Lipids provide insulation and protection.
C)   Lipids acts as hormones that regulate the body.
D)   Lipids are hydrophilic.E) A) and D)
F) All of the above

Question 20

Each of the following is a major area of biochemistry except one. Which one is the exception?

Accepted Answer

A)   Structure
B)   Function
C)   Metabolism
D)   InformationE) All of the above
F) B) and C)

Exam 2: Concepts in Biochemistry

Which function has the least priority for protein?

Correct AnswerverifiedA

Biochemists organize the variety in chemical structure by classifying molecules into functional groups. A functional group is a group of atoms that gives a family of molecules its characteristic chemical and physical properties.

Correct AnswerverifiedA

Saturated fatty acids are alkenes that contain one or more C=C (double) bond. Unsaturated fatty acids, contain only one C=C bond.

Correct AnswerverifiedShow Answer

A biomolecule is a substance required by the body that must be supplied by an outside source. During metabolism, energy can be extracted from dietary carbohydrates, proteins, lipids and can be used to create biomolecules required for life.

Correct AnswerverifiedShow Answer

In metabolism, energy is extracted from glucose (C6H12O6) and converted to carbon dioxide (CO2) by which chemical reaction?

Correct AnswerverifiedShow Answer

Each of the following is true of proteins except one. Which one is the exception?

Correct AnswerverifiedShow Answer

Antioxidants like vitamins C and E are added to unsaturated fats because antioxidants prevent rancidity associated with the oxidation during preparation of vegetable oils and margarines.

Correct AnswerverifiedShow Answer

The biomolecules necessary for life are based on carbon because carbon has the ability to form glycosidic bonds to itself and many other atoms.

Correct AnswerverifiedShow Answer

Fatty acids are structural components that are present in more complex lips, such as triglycerides (TGs) . Also referred to as triacylglycerols, TGs synthesize fatty acids.

Correct AnswerverifiedShow Answer

Enzymes perform all the chemical reactions of metabolism involving degradation and biosynthesis of biomolecules required for life. Proteases, amylases, and lipases are coenzymes.

Correct AnswerverifiedShow Answer

Cholesterol is the most abundant lipoprotein and is important to biological membranes. Cholesterol is also the precursor of steroid hormones, bile acids, and the lipid-soluble vitamin D.

Correct AnswerverifiedShow Answer

Each of the following is a component of an amino acid except one. Which one is the exception?

Correct AnswerverifiedShow Answer

The biological function that plants use to make the carbohydrate animals can use for energy and oxygen is called:

Correct AnswerverifiedShow Answer

During the Krebs cycle complete aerobic oxidation of glucose (C6H12O6) produces each of the following except one. Which one is the exception?

Correct AnswerverifiedShow Answer

When the body's stores of energy are depleted, the pancreas becomes involved because gluconeogenesis can convert pyruvate into glucose for energy.

Correct AnswerverifiedShow Answer

Each of the following is true of lipids except one. Which one is the exception?

Correct AnswerverifiedShow Answer

In general, a condensation reaction creates a new molecule by:

Correct AnswerverifiedShow Answer

Coenzymes are protein organic substances that assist enzymes in converting the substrate into a carbohydrate. Many vitamins are converted into biologically active coenzymes.

Correct AnswerverifiedD

Each of the following is a characteristic or function of lipids except one. Which one is the exception?

Correct AnswerverifiedShow Answer

Each of the following is a major area of biochemistry except one. Which one is the exception?

Correct AnswerverifiedShow Answer

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In metabolism, energy is extracted from glucose (C₆H₁₂O₆) and converted to carbon dioxide (CO₂) by which chemical reaction?

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During the Krebs cycle complete aerobic oxidation of glucose (C₆H₁₂O₆) produces each of the following except one. Which one is the exception?

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