Question 1

A candy bar contains 108 calories per serving.There are 4 grams of carbohydrate, 5 grams of protein, and 8 grams of fat in a serving.How many of the calories come from fat?

Accepted Answer

A)  72
B)  16
C)  18
D)  20E) A) and C)
F) A) and D)

Question 2

Phospholipids are made up of:

Accepted Answer

A)  a glycerol and three fatty acids.
B)  four fused carbon rings.
C)  a phosphate, two fatty acids and a glycerol.
D)  five-carbon rings with two nonpolar tails.E) All of the above
F) A) and D)

Question 3

Acyclovir is an antiviral chemical that resembles a nucleotide but lacks a 3' OH group and cannot form phosphodiester bonds.Why is Acyclovir useful in treating some viral infections?

Accepted Answer

A)  Acyclovir stops viral protein synthesis.
B)  Acyclovir halts viral DNA replication.
C)  Acyclovir blocks the assembly of viral cell capsules.
D)  Acyclovir hydrolyzes viral polysaccharides.E) A) and D)
F) None of the above

Question 4

Seth purchased five pounds of live crayfish and realized that the outer shells were made of a tough carbohydrate similar to that used to make the carapace of a cockroach.What do you think the outer shells of the crawfish are made of?

Accepted Answer

A)  Glycogen
B)  Chitin
C)  Amylopectin
D)  CelluloseE) C) and D)
F) A) and B)

Question 5

The types of bonds found in nucleic acids are:

Accepted Answer

A)  phosphodiester bonds.
B)  peptide bonds.
C)  ionic bonds.
D)  non-polar covalent bonds.E) C) and D)
F) All of the above

Question 6

The biological macromolecule that is least soluble in water is a(n) :

Accepted Answer

A)  lipid.
B)  nucleic acid.
C)  protein.
D)  carbohydrate.E) B) and D)
F) None of the above

Question 7

Which of the following reactions is a hydrolysis reaction?

Accepted Answer

A)  A + B + H2O  →\rightarrow→  C
B)  A  →\rightarrow→  B + C+ H2O
C)  A + B  →\rightarrow→  C + H2O
D)  A + H2O  →\rightarrow→  B + C E) A) and C)
F) None of the above

Question 8

People who are lactose intolerant can often consume some products made from milk such as cheese and yogurt because microorganisms in their digestive system consume the lactose.By comparison, people with a true milk allergy, which involves an immune response to milk protein, cannot consume milk or products made from milk.Given this information, what can you conclude about milk?

Accepted Answer

A)  The protein that causes a true milk allergy is lactose.
B)  All people who are lactose intolerant are also allergic to milk.
C)  Yogurt contains live and active cultures of Lactobacillus acidophilus bacteria and therefore prevents an allergic response in people with a true milk allergy.
D)  Lactose is a carbohydrate, not a protein and is therefore not the cause of true milk allergies.E) A) and B)
F) A) and C)

Question 9

If all functional groups are removed from an organic molecule, leaving only a hydrocarbon chain, the molecule becomes a:

Accepted Answer

A)  Lipid
B)  Carbohydrate
C)  Protein
D)  Nucleic acidE) A) and B)
F) None of the above

Question 10

Proteins are polymers formed of structural units called:

Accepted Answer

A)  fatty acids.
B)  amino acids.
C)  nucleotides.
D)  phosphate groups.E) A) and B)
F) A) and C)

Question 11

Egg whites consist primarily of water and the protein albumin.When you fry an egg, why does the egg white turn from clear to white?

Accepted Answer

A)  The protein becomes dissociated.
B)  The protein acquires tertiary structure.
C)  The protein becomes denatured.
D)  The protein becomes dehydrated.E) A) and B)
F) A) and C)

Question 12

The nitrogenous base that is only found in RNA and not DNA is:

Accepted Answer

A)  adenine
B)  cytosine
C)  uracil
D)  guanineE) B) and C)
F) A) and D)

Question 13

The covalent bonds connecting monomer units in sugars can be formed by the removal of a water molecule.This reaction is referred to as: rev: 09_11_2014_QC_53628

Accepted Answer

A)  a hydrolysis reaction.
B)  an oxidation-reduction reaction.
C)  a dehydration reaction.
D)  a hydration reaction.E) All of the above
F) A) and C)

Question 14

The DNA sequence capable of pairing with 5' CGATTAGT 3' is:

Accepted Answer

A)  5' CGATTAGT 3'.
B)  5' GCTAATCA 3'.
C)  3' CGATTAGT 5'.
D)  3' GCTAATCA 5'.E) C) and D)
F) B) and D)

Question 15

Macromolecules that are used by most organisms to store hereditary information are called:

Accepted Answer

A)  proteins.
B)  transfer RNA molecules.
C)  ribosomal RNA molecules.
D)  DNA molecules.E) A) and D)
F) B) and C)

Question 16

Three fatty acids bonded together with a glycerol are found in a(n) :

Accepted Answer

A)  enzyme.
B)  chlorophyll pigment.
C)  phospholipid.
D)  triglyceride.E) A) and D)
F) B) and C)

Question 17

Which amino acid is least soluble in water?

Accepted Answer

A)  Alanine
B)  Glutamine
C)  Glycine
D)  IsoleucineE) All of the above
F) A) and D)

Question 18

Enzymes function to:

Accepted Answer

A)  react with other enzymes to form a product.
B)  catalyze chemical reactions.
C)  transport molecules and ions across membranes.
D)  regulate messages between cells.E) A) and C)
F) A) and B)

Question 19

Denaturation disrupts the secondary and tertiary structure of proteins.However, denaturation is not strong enough to disrupt what interaction that is relevant to protein structure?

Accepted Answer

A)  ionic bonds
B)  hydrophobic exclusion
C)  peptide bonds
D)  van der Waals attractionE) All of the above
F) C) and D)

Question 20

A modified form of cellulose found in the exoskeletons of insects and crustaceans is known as:

Accepted Answer

A)  chitin
B)  starch
C)  amylose
D)  glycogenE) B) and D)
F) A) and B)

Exam 3: The Chemical Building Blocks of Life

If all functional groups are removed from an organic molecule, leaving only a hydrocarbon chain, the molecule becomes a:

Correct Answer
verified

Phospholipids are made up of:

Correct Answer
verified

The nitrogenous base that is only found in RNA and not DNA is:

Correct Answer
verified

Seth purchased five pounds of live crayfish and realized that the outer shells were made of a tough carbohydrate similar to that used to make the carapace of a cockroach.What do you think the outer shells of the crawfish are made of?

Correct Answer
verified

The types of bonds found in nucleic acids are:

Correct Answer
verified

Denaturation disrupts the secondary and tertiary structure of proteins.However, denaturation is not strong enough to disrupt what interaction that is relevant to protein structure?

Correct Answer
verified

Which of the following reactions is a hydrolysis reaction?

Correct Answer
verified

Egg whites consist primarily of water and the protein albumin.When you fry an egg, why does the egg white turn from clear to white?

Correct Answer
verified

The biological macromolecule that is least soluble in water is a(n) :

Correct Answer
verified

The covalent bonds connecting monomer units in sugars can be formed by the removal of a water molecule.This reaction is referred to as: rev: 09_11_2014_QC_53628

Correct Answer
verified

A candy bar contains 108 calories per serving.There are 4 grams of carbohydrate, 5 grams of protein, and 8 grams of fat in a serving.How many of the calories come from fat?

Correct Answer
verified

Three fatty acids bonded together with a glycerol are found in a(n) :

Correct Answer
verified

Proteins are polymers formed of structural units called:

Correct Answer
verified

Correct Answer
verified

Enzymes function to:

Correct Answer
verified

Macromolecules that are used by most organisms to store hereditary information are called:

Correct Answer
verified

The DNA sequence capable of pairing with 5' CGATTAGT 3' is:

Correct Answer
verified

Which amino acid is least soluble in water?

Correct Answer
verified

A modified form of cellulose found in the exoskeletons of insects and crustaceans is known as:

Correct Answer
verified

Acyclovir is an antiviral chemical that resembles a nucleotide but lacks a 3' OH group and cannot form phosphodiester bonds.Why is Acyclovir useful in treating some viral infections?

Correct Answer
verified

Exam 3: The Chemical Building Blocks of Life

If all functional groups are removed from an organic molecule, leaving only a hydrocarbon chain, the molecule becomes a:

Correct AnswerverifiedShow Answer

Phospholipids are made up of:

Correct AnswerverifiedShow Answer

The nitrogenous base that is only found in RNA and not DNA is:

Correct AnswerverifiedShow Answer

Seth purchased five pounds of live crayfish and realized that the outer shells were made of a tough carbohydrate similar to that used to make the carapace of a cockroach.What do you think the outer shells of the crawfish are made of?

Correct AnswerverifiedShow Answer

The types of bonds found in nucleic acids are:

Correct AnswerverifiedShow Answer

Denaturation disrupts the secondary and tertiary structure of proteins.However, denaturation is not strong enough to disrupt what interaction that is relevant to protein structure?

Correct AnswerverifiedShow Answer

Which of the following reactions is a hydrolysis reaction?

Correct AnswerverifiedShow Answer

Egg whites consist primarily of water and the protein albumin.When you fry an egg, why does the egg white turn from clear to white?

Correct AnswerverifiedShow Answer

The biological macromolecule that is least soluble in water is a(n) :

Correct AnswerverifiedShow Answer

The covalent bonds connecting monomer units in sugars can be formed by the removal of a water molecule.This reaction is referred to as: rev: 09_11_2014_QC_53628

Correct AnswerverifiedShow Answer

A candy bar contains 108 calories per serving.There are 4 grams of carbohydrate, 5 grams of protein, and 8 grams of fat in a serving.How many of the calories come from fat?

Correct AnswerverifiedShow Answer

Three fatty acids bonded together with a glycerol are found in a(n) :

Correct AnswerverifiedShow Answer

Proteins are polymers formed of structural units called:

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Enzymes function to:

Correct AnswerverifiedShow Answer

Macromolecules that are used by most organisms to store hereditary information are called:

Correct AnswerverifiedShow Answer

The DNA sequence capable of pairing with 5' CGATTAGT 3' is:

Correct AnswerverifiedShow Answer

Which amino acid is least soluble in water?

Correct AnswerverifiedShow Answer

A modified form of cellulose found in the exoskeletons of insects and crustaceans is known as:

Correct AnswerverifiedShow Answer

Acyclovir is an antiviral chemical that resembles a nucleotide but lacks a 3' OH group and cannot form phosphodiester bonds.Why is Acyclovir useful in treating some viral infections?

Correct AnswerverifiedShow Answer

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