Question 1

A peptide bond is a covalent bond formed between the amino group of one amino acid and the R group of another amino acid.

Accepted Answer

A) True 
 B)False

Question 2

The first energy shell of an atom contains a maximum of:

Accepted Answer

A)  One electron
B)  Two electrons
C)  Four electrons
D)  Eight electrons
E)  Sixteen electronsF) A) and B)
G) A) and C)

Question 3

Saturated fats have long straight tails of fatty acids,while unsaturated fats have kinks in their tails due to double bonds.These kinks prevent the fats from packing together as tightly.Animals that are ectothermic (cold blooded) need to keep their membranes fluid at cooler temperature and thus use ______ in their membranes.

Accepted Answer

A)  Mostly unsaturated fats
B)  Mostly saturated fats
C)  Equal amounts of saturated and unsaturated fats
D)  Carbohydrates
E)  ProteinsF) B) and E)
G) B) and D)

Question 4

The four major groups of organic compounds are:

Accepted Answer

A)  Fats, waxes, carbohydrates, and amino acids
B)  Carbohydrates, lipids, steroids, and monosaccharides
C)  Lipids, fats, waxes, and steroids
D)  Carbohydrates, lipids, proteins, and nucleic acids
E)  Carbohydrates, proteins, amino acids, and nucleic acidsF) A) and B)
G) A) and C)

Question 5

Proteins store the genetic information of the cell and transmit it to the next generation.

Accepted Answer

A) True 
 B)False

Question 6

A fatty acid is unsaturated if there is at least one double bond between the carbon atoms in that fatty acid.

Accepted Answer

A) True 
 B)False

Question 7

Within a single molecule of water,____ bonds are formed between oxygen and hydrogen?

Accepted Answer

A)  Ionic bonds
B)  Covalent bonds
C)  Hydrogen bonds
D)  Hydrophobic bonds
E)  Nuclear bondsF) C) and D)
G) A) and B)

Question 8

A base:

Accepted Answer

A)  Has a value of 7 on the pH scale
B)  Is a chemical that adds hydrogen ions to a solution
C)  Is a chemical that absorbs hydrogen ions from a solution
D)  Has a value below 7 on the pH scaleE) All of the above
F) A) and B)

Question 9

In a covalent bond:

Accepted Answer

A)  Atoms share electrons
B)  Atoms of opposite charges attract each other
C)  Atoms share a protonD) A) and B)
E) A) and C)

Question 10

Many digestive enzymes are hydrolases.What do these enzymes have in common?

Accepted Answer

A)  They use water to form bonds between monomers
B)  They use water to break bonds in monomers
C)  They use water to break bonds in polymers
D)  They use water to form bonds between polymers
E)  They release water in forming bonds between monomersF) C) and D)
G) A) and D)

Question 11

The term pH refers to:

Accepted Answer

A)  [H+]2
B)  [H+]
C)  -log[H+]
D)  -[H+]
E)  log[H+]F) B) and D)
G) A) and B)

Question 12

A substance having a pH of 7 would best be described as:

Accepted Answer

A)  A weak acid
B)  A weak base
C)  Neutral
D)  A strong acid
E)  A strong baseF) All of the above
G) A) and E)

Question 13

Which of the following is not a true statement?

Accepted Answer

A)  Nitric oxide consists of one atom of nitrogen and one atom of oxygen
B)  Nitric oxide is a gas
C)  Nitric oxide passes freely into and out of cells
D)  Nitric oxide is a harmful substance found in smog and acid rain
E)  Nitric oxide has no true function in living organismsF) A) and E)
G) C) and D)

Question 14

When 14C decays to 14N the number of protons ____ and the number of neutrons ___.

Accepted Answer

A)  Decreases by 1; increases by 1
B)  Stays the same; increases by 1
C)  Increases by 1; stays the same
D)  Increases by 1; decreases by 1
E)  Decreases by 1; stays the sameF) B) and E)
G) D) and E)

Question 15

The three major components in a nucleotide are:

Accepted Answer

A)  Glucose, a nitrogen base, and a phosphate group
B)  Glucose, a fatty acid, and glycerol
C)  A nitrogen base, a six carbon sugar, and a phosphate group
D)  A nitrogen base, a five carbon sugar, and a phosphate group
E)  A carboxyl group, an R group, and an amino groupF) C) and E)
G) B) and E)

Question 16

____ bonds are formed between monomers to form a polymer.

Accepted Answer

A)  Ionic bonds
B)  Covalent bonds
C)  Hydrogen bonds
D)  Hydrophobic bonds
E)  Nuclear bondsF) A) and D)
G) B) and D)

Question 17

How did the scientists determine if an organic molecule was extraterrestrial?

Accepted Answer

A)  By looking for a decrease in 13C and 15N in the meteorite
B)  By measuring the amount of amino acids in the meteorite
C)  By measuring the amount of nucleotides in the meteorite
D)  By looking for an increase in 13C and 15N in the meteorite
E)  By measuring the total amount of carbon and nitrogen in the meteoriteF) A) and D)
G) All of the above

Question 18

The second energy shell of an atom contains a maximum of:

Accepted Answer

A)  Eight electrons
B)  Two electrons
C)  Four electrons
D)  One electron
E)  Sixteen electronsF) D) and E)
G) C) and E)

Question 19

An essential amino acid is an amino acid that is found in all types of foods.

Accepted Answer

A) True 
 B)False

Question 20

The primary function of hemoglobin is to regulate the level of sugar in the blood.

Accepted Answer

A) True 
 B)False

Exam 2: The Chemistry of Life

A base:

Correct Answer
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How did the scientists determine if an organic molecule was extraterrestrial?

Correct Answer
verified

A substance having a pH of 7 would best be described as:

Correct Answer
verified

The second energy shell of an atom contains a maximum of:

Correct Answer
verified

Which of the following is not a true statement?

Correct Answer
verified

An essential amino acid is an amino acid that is found in all types of foods.

Correct Answer
verified

In a covalent bond:

Correct Answer
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A peptide bond is a covalent bond formed between the amino group of one amino acid and the R group of another amino acid.

Correct Answer
verified

When ¹⁴C decays to ¹⁴N the number of protons __ and the number of neutrons _.

Correct Answer
verified

Correct Answer
verified

The term pH refers to:

Correct Answer
verified

Many digestive enzymes are hydrolases.What do these enzymes have in common?

Correct Answer
verified

The first energy shell of an atom contains a maximum of:

Correct Answer
verified

A fatty acid is unsaturated if there is at least one double bond between the carbon atoms in that fatty acid.

Correct Answer
verified

Proteins store the genetic information of the cell and transmit it to the next generation.

Correct Answer
verified

Within a single molecule of water,____ bonds are formed between oxygen and hydrogen?

Correct Answer
verified

The four major groups of organic compounds are:

Correct Answer
verified

____ bonds are formed between monomers to form a polymer.

Correct Answer
verified

The primary function of hemoglobin is to regulate the level of sugar in the blood.

Correct Answer
verified

The three major components in a nucleotide are:

Correct Answer
verified

Exam 2: The Chemistry of Life

A base:

Correct AnswerverifiedShow Answer

How did the scientists determine if an organic molecule was extraterrestrial?

Correct AnswerverifiedShow Answer

A substance having a pH of 7 would best be described as:

Correct AnswerverifiedShow Answer

The second energy shell of an atom contains a maximum of:

Correct AnswerverifiedShow Answer

Which of the following is not a true statement?

Correct AnswerverifiedShow Answer

An essential amino acid is an amino acid that is found in all types of foods.

Correct AnswerverifiedShow Answer

In a covalent bond:

Correct AnswerverifiedShow Answer

A peptide bond is a covalent bond formed between the amino group of one amino acid and the R group of another amino acid.

Correct AnswerverifiedShow Answer

When 14C decays to 14N the number of protons ____ and the number of neutrons ___.

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

The term pH refers to:

Correct AnswerverifiedShow Answer

Many digestive enzymes are hydrolases.What do these enzymes have in common?

Correct AnswerverifiedShow Answer

The first energy shell of an atom contains a maximum of:

Correct AnswerverifiedShow Answer

A fatty acid is unsaturated if there is at least one double bond between the carbon atoms in that fatty acid.

Correct AnswerverifiedShow Answer

Proteins store the genetic information of the cell and transmit it to the next generation.

Correct AnswerverifiedShow Answer

Within a single molecule of water,____ bonds are formed between oxygen and hydrogen?

Correct AnswerverifiedShow Answer

The four major groups of organic compounds are:

Correct AnswerverifiedShow Answer

____ bonds are formed between monomers to form a polymer.

Correct AnswerverifiedShow Answer

The primary function of hemoglobin is to regulate the level of sugar in the blood.

Correct AnswerverifiedShow Answer

The three major components in a nucleotide are:

Correct AnswerverifiedShow Answer

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When ¹⁴C decays to ¹⁴N the number of protons __ and the number of neutrons _.

Correct Answer
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Correct Answer
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