Question 1

Which of the following levels of protein folding would include shapes identified as helix and pleated sheet?

Accepted Answer

A)   primary structure
B)   secondary structure
C)   tertiary structure
D)   quaternary structureE) A) and D)
F) A) and C)

Question 2

Which of the following correctly lists the parts of a nucleotide of RNA?

Accepted Answer

A)   nitrogen-containing base, deoxyribose, phosphate
B)   sulfur-containing base, ribose, phosphate
C)   nitrogen-containing base, ribose, phosphate
D)   nitrogen-containing base, ribose, sulfur
E)   amino acid, glycerol, nitrogen-containing base A nucleotide of any nucleic acid consists of a phosphate, sugar, and nitrogenous base.F) A) and B)
G) D) and E)

Question 3

What category of biological molecules are steroids included in?

Accepted Answer

A)   proteins
B)   lipids
C)   carbohydrates
D)   nucleic acids
E)   fatsF) B) and D)
G) A) and B)

Question 4

A triglyceride is formed when three fatty acids join a glycerol by a

Accepted Answer

A)   hydrolysis reaction.
B)   dehydration reaction.
C)   polymeric reaction.
D)   digestive reaction.
E)   evaporation reaction. When glycerol and three fatty acids join to form a fat, three water molecules also form as a product. This is known as a dehydration synthesis reaction.F) B) and D)
G) A) and D)

Question 5

Which formula is a hydrocarbon?

Accepted Answer

A)   CO?2
B)   CH4
C)   NaCl
D)   CaCl2
E)   H2O Hydrocarbons are chains of carbon atoms that are joined to hydrogen atoms. Methane, CH4, is the only representative in the choices provided.F) A) and C)
G) B) and C)

Question 6

How does DNA differ from RNA?

Accepted Answer

A)   DNA is in plants; RNA is found in animals.
B)   DNA is comprised of a double-strand; RNA is a single-strand.
C)   DNA is made from amino acids; RNA is made from nucleotides.
D)   DNA is used by all living things; RNA is used only in plants.
E)   DNA is seen in animals; RNA is seen in all living things. DNA is a double strand of joined nucleotides, while RNA is a single strand of nucleotides. Both are found in all living things.F) B) and D)
G) B) and C)

Question 7

DNA and RNA differ in that

Accepted Answer

A)   DNA is single-stranded and contains the sugar deoxyribose and the nitrogen-containing base thymine; RNA is double-stranded and contains sugar ribose and the nitrogen-containing base uracil.
B)   DNA is double-stranded and contains the sugar deoxyribose and the nitrogen-containing base thymine; RNA is single-stranded and contains sugar ribose and the nitrogen-containing base uracil.
C)   DNA is single-stranded and contains the sugar ribose and the nitrogen-containing base thymine; RNA is single-stranded and contains sugar deoxyribose and the nitrogen-containing base uracil.
D)   DNA is single-stranded and contains the sugar deoxyribose and the nitrogen-containing base uracil; RNA is double-stranded and contains sugar ribose and the nitrogen-containing base thymine.
E)   DNA is double-stranded and contains the sugar ribose and the nitrogen-containing base thymine; RNA is single-stranded and contains sugar deoxyribose and the nitrogen-containing base uracil. The structural differences between DNA and RNA allows the cell to distinguish between the two types of nucleic acids.F) A) and D)
G) B) and D)

Question 8

If a material mixes readily with water, it is identified as

Accepted Answer

A)   dehydrated.
B)   hydrophobic.
C)   saturated.
D)   hydrophilic.
E)   salty. Hydrophilic means "water loving," which makes the material capable of dissolving in water.F) All of the above
G) A) and C)

Question 9

A molecule is said to be organic if it contains

Accepted Answer

A)   double bonds.
B)   hydrogen bonds.
C)   carbon and hydrogen atoms.
D)   carbon and oxygen atoms.
E)   two or more atoms.F) B) and C)
G) None of the above

Question 10

Which of the following is not an organic molecule?

Accepted Answer

A)   C12H9SO3H
B)   C9H13NO3
C)   C10H13N5O4
D)   H2NCH2CN
E)   COCl2 Organic molecules are those that contain both carbon and hydrogen and may contain a variety of other elements.F) B) and C)
G) D) and E)

Question 11

When starch is digested, an -OH group and an -H group from a water molecule is used in hydrolysis to split the monosaccharide subunits.

Accepted Answer

A) True 
 B)False

Question 12

Which of the following levels of a protein are susceptible to denaturation?

Accepted Answer

A)   primary and secondary structures
B)   secondary and tertiary structures
C)   tertiary and quaternary structures
D)   primary and tertiary structures
E)   primary and quaternary structures Denaturation by such things as pH and temperature cause the bonds which allow for tertiary and quaternary structures to be disrupted. When their folding is altered, the function of the protein is disrupted.F) C) and E)
G) A) and B)

Question 13

Of the following, which is a feature that proteins and polysaccharides share?

Accepted Answer

A)   They are made of repeated monomer units.
B)   They are both made from fatty acids.
C)   They both contain glucose.
D)   They are both long chains of repeated nucleotide units.
E)   They both contain nitrogen. Proteins and carbohydrates both consist of repeated monomers.F) B) and D)
G) A) and C)

Question 14

Scientists created an enzyme that will break down any type of carbohydrate. If given to humans, they could use which of the following as a new food source?

Accepted Answer

A)   glucose
B)   glycerol
C)   cellulose
D)   cholesterol
E)   protein Cellulose is a polysaccharide with bond linkages that are undigestable by humans. The digestive enzymes of animals are unable to hydrolyze cellulose.F) C) and D)
G) A) and B)

Question 15

Which word does not belong with the others?

Accepted Answer

A)   fats
B)   steroids
C)   glycogen
D)   phospholipids
E)   lipids Glycogen is a polysaccharide, but the other choices are all types of lipids.F) B) and C)
G) A) and C)

Question 16

Which one of the following is not a potential danger of anabolic steroids?

Accepted Answer

A)   can result in liver problems
B)   can enhance the body's production of normal sex hormones
C)   can cause mood swings and depression
D)   can reduce sex drive
E)   can result in heart problems Besides the destruction of heart and kidney function, anabolic steroids upset the normal hormonal balances in the body. As the levels of synthetic hormone are detected, the body suppresses the natural production of its sex hormones.F) All of the above
G) B) and D)

Question 17

The basic building block or subunit of many biological molecules is called an)

Accepted Answer

A)   quaternary structure.
B)   polymer.
C)   monomer.
D)   isomer.
E)   chain. A monomer subunit is the building block to create long organic molecule chains called polymers.F) None of the above
G) A) and E)

Question 18

In sickle-cell disease, malformation of red blood cells is caused by only one mistake for one amino acid in the genetic code for hemoglobin.

Accepted Answer

A) True 
 B)False

Question 19

Deoxyribose is a sugar found in

Accepted Answer

A)   glucose.
B)   enzymes.
C)   DNA.
D)   glycogen.
E)   protein. The sugar deoxyribose is one portion of a nucleotide monomer that helps to create the biological molecule DNA.F) C) and E)
G) C) and D)

Question 20

In which of the following is the correct monomer matched with its polymer?

Accepted Answer

A)   fatty acid - DNA
B)   monosaccharide - lipid
C)   glycerol - carbohydrate
D)   amino acid - protein
E)   nucleotide - carbohydrateF) C) and D)
G) A) and D)

Exam 3: The Organic Molecules of Life

Which of the following levels of protein folding would include shapes identified as helix and pleated sheet?

Correct AnswerverifiedShow Answer

What category of biological molecules are steroids included in?

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Which of the following is not an organic molecule?

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If a material mixes readily with water, it is identified as

Correct AnswerverifiedShow Answer

A molecule is said to be organic if it contains

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Which of the following correctly lists the parts of a nucleotide of RNA?

Correct AnswerverifiedShow Answer

Deoxyribose is a sugar found in

Correct AnswerverifiedShow Answer

Which one of the following is not a potential danger of anabolic steroids?

Correct AnswerverifiedShow Answer

Which word does not belong with the others?

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Which formula is a hydrocarbon?

Correct AnswerverifiedShow Answer

How does DNA differ from RNA?

Correct AnswerverifiedShow Answer

When starch is digested, an -OH group and an -H group from a water molecule is used in hydrolysis to split the monosaccharide subunits.

Correct AnswerverifiedShow Answer

In sickle-cell disease, malformation of red blood cells is caused by only one mistake for one amino acid in the genetic code for hemoglobin.

Correct AnswerverifiedShow Answer

The basic building block or subunit of many biological molecules is called an)

Correct AnswerverifiedShow Answer

Scientists created an enzyme that will break down any type of carbohydrate. If given to humans, they could use which of the following as a new food source?

Correct AnswerverifiedShow Answer

Of the following, which is a feature that proteins and polysaccharides share?

Correct AnswerverifiedShow Answer

Which of the following levels of a protein are susceptible to denaturation?

Correct AnswerverifiedShow Answer

DNA and RNA differ in that

Correct AnswerverifiedShow Answer

In which of the following is the correct monomer matched with its polymer?

Correct AnswerverifiedShow Answer

A triglyceride is formed when three fatty acids join a glycerol by a

Correct AnswerverifiedShow Answer

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