Question 1

Isotopes are atoms of the same element that differ in their

Accepted Answer

A)   neutron number.
B)   electron number.
C)   proton number.
D)   atomic number.
E)   chemical properties.F) C) and D)
G) B) and D)

Question 2

The weak, attractive force between water molecules is due to

Accepted Answer

A)   hydrogen bonds.
B)   covalent bonds.
C)   ionic bonds.
D)   peptide bonds.
E)   glycosidic bonds.F) A) and E)
G) A) and B) A

Question 3

Which of the following carbohydrates is found in dairy products?

Accepted Answer

A)   lactose
B)   sucrose
C)   maltose
D)   glucose
E)   fructoseF) A) and E)
G) B) and C)

Question 4

All of the following are monosaccharides except

Accepted Answer

A)   glucose.
B)   glycogen.
C)   fructose.
D)   ribose.
E)   deoxyribose.F) All of the above
G) C) and D)

Question 5

Polar molecules are composed of covalently-bonded

Accepted Answer

A)   identical atoms.
B)   carbon atoms.
C)   ions.
D)   atoms of different electronegativity.
E)   atoms of identical electronegativity.F) A) and E)
G) A) and C) D

Question 6

Two or more atoms bonded together are called a/an

Accepted Answer

A)   ion.
B)   isotope.
C)   element.
D)   electrolyte.
E)   molecule.F) A) and E)
G) C) and D)

Question 7

The hydrophobic tails of a phospholipid are composed of

Accepted Answer

A)   fatty acids.
B)   glycerol.
C)   phosphate.
D)   alcohol.
E)   All of these choices are correct.F) B) and E)
G) B) and D)

Question 8

Protons and neutrons make up the atom's central core referred to as its _____.

Accepted Answer

The answer of Protons and neutrons make up the atom's...

Question 9

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)   a cell's glycocalyx.
D)   cellulose in certain cell walls.
E)   prostaglandins in inflammation.F) All of the above
G) A) and D)

Question 10

Which of the following functional groups participate in the formation of an ester bond?

Accepted Answer

A)   hydroxyl group and amino group
B)   carboxyl group and amino group
C)   hydroxyl group and carboxyl group
D)   hydroxyl group and carbonyl groupE) C) and D)
F) A) and B)

Question 11

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

Accepted Answer

saturated

Question 12

All of the following are correct about triglycerides, except

Accepted Answer

A)   triglycerides are insoluble in water.
B)   triglycerides are a concentrated source of energy.
C)   unsaturated triglycerides are solid at room temperature.
D)   triglycerides dissolve in nonpolar solvents.
E)   triglycerides are hydrolyzed by lipases.F) A) and E)
G) A) and D)

Question 13

All proteins are enzymes.

Accepted Answer

A) True 
 B)False

Question 14

The only part of an amino acid that differs from other amino acids is its R group.

Accepted Answer

A) True 
 B)False

Question 15

Which of the following is found in DNA but not in RNA?

Accepted Answer

A)   ribose
B)   adenine
C)   thymine
D)   uracil
E)   nucleotidesF) A) and B)
G) B) and E)

Question 16

All of the following are lipids except

Accepted Answer

A)   cholesterol.
B)   starch.
C)   phospholipid.
D)   wax.
E)   triglyceride.F) B) and D)
G) D) and E)

Question 17

The alpha helix and beta pleated sheet are examples of

Accepted Answer

A)   primary structure.
B)   secondary structure.
C)   tertiary structure.
D)   quaternary structure.
E)   gamma structure.F) A) and C)
G) A) and B)

Question 18

Chemical analysis of an unidentified compound isolated from cells showed the presence of carbon, hydrogen, oxygen, nitrogen, and sulfur. This unknown compound is most likely a

Accepted Answer

A)   carbohydrate.
B)   nucleic acid.
C)   lipid.
D)   protein.E) A) and B)
F) C) and D)

Question 19

A newly synthesized polypeptide that will ultimately form a cytoplic protein will most likely fold into a tertiary structure with its _____________ amino acid R-groups facing outward.

Accepted Answer

A)   hydrophilic
B)   hydrophobicC) A) and B)
D) undefined

Question 20

A newly synthesized polypeptide will ultimately be located within the phospholipid bilayer of the pla membrane. When this polypeptide folds to form its tertiary structure, the _____________ amino acid R-groups will most likely be facing outward.

Accepted Answer

A)   hydrophilic
B)   hydrophobicC) A) and B)
D) undefined

Exam 2: The Chemistry of Biology

Isotopes are atoms of the same element that differ in their

Correct AnswerverifiedShow Answer

The weak, attractive force between water molecules is due to

Correct AnswerverifiedA

Which of the following carbohydrates is found in dairy products?

Correct AnswerverifiedShow Answer

All of the following are monosaccharides except

Correct AnswerverifiedShow Answer

Polar molecules are composed of covalently-bonded

Correct AnswerverifiedD

Two or more atoms bonded together are called a/an

Correct AnswerverifiedShow Answer

The hydrophobic tails of a phospholipid are composed of

Correct AnswerverifiedShow Answer

Protons and neutrons make up the atom's central core referred to as its _____.

Correct AnswerverifiedShow Answer

All of the following are polysaccharides, except

Correct AnswerverifiedShow Answer

Which of the following functional groups participate in the formation of an ester bond?

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 Answerverifiedsaturated

All of the following are correct about triglycerides, except

Correct AnswerverifiedShow Answer

All proteins are enzymes.

Correct AnswerverifiedShow Answer

The only part of an amino acid that differs from other amino acids is its R group.

Correct AnswerverifiedShow Answer

Which of the following is found in DNA but not in RNA?

Correct AnswerverifiedShow Answer

All of the following are lipids except

Correct AnswerverifiedShow Answer

The alpha helix and beta pleated sheet are examples of

Correct AnswerverifiedShow Answer

Chemical analysis of an unidentified compound isolated from cells showed the presence of carbon, hydrogen, oxygen, nitrogen, and sulfur. This unknown compound is most likely a

Correct AnswerverifiedShow Answer

A newly synthesized polypeptide that will ultimately form a cytoplic protein will most likely fold into a tertiary structure with its _____________ amino acid R-groups facing outward.

Correct AnswerverifiedShow Answer

A newly synthesized polypeptide will ultimately be located within the phospholipid bilayer of the pla membrane. When this polypeptide folds to form its tertiary structure, the _____________ amino acid R-groups will most likely be facing outward.

Correct AnswerverifiedShow Answer

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saturated

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