Question 1

A simple carbohydrate

Accepted Answer

A)  has a molecular formula of C₆H₁₂O₆.
B)  is a building block of protein.
C)  consists of several joined chains.
D)  has only one nucleotide.E) A) and C)
F) B) and C)

Question 2

The nitrogenous bases of DNA and RNA provide informational content because

Accepted Answer

A)  the bases are of several types and therefore can form a code sequence.
B)  they all contain nitrogen.
C)  their sugars and phosphates vary.
D)  the bases are also parts of amino acids.E) All of the above
F) A) and C)

Question 3

Chemistry is the study of the composition of matter and how matter changes.

Accepted Answer

A) True 
 B)False

Question 4

When K⁺ and Cl⁻ meet, they will

Accepted Answer

A)  repel and form no product.
B)  form KCl with an ionic bond.
C)  form KCl with a covalent bond.
D)  form individual molecules.E) All of the above
F) None of the above

Question 5

On the pH scale

Accepted Answer

A)  a tenfold difference in hydrogen ion concentration separates each whole number.
B)  the lower the whole number on the scale, the greater the H⁺ concentration.
C)  pH values above 7 are basic (alkaline) .
D)  All of the answer choices are correct.E) A) and D)
F) A) and C)

Question 6

Which of the following is characteristic of carbohydrates?

Accepted Answer

A)  They contain C, H, O, with twice as many hydrogen as oxygen atoms.
B)  They provide much of the energy that the cell requires.
C)  They include sugars and starches.
D)  All of the answer choices are correct.E) C) and D)
F) All of the above

Question 7

Amylase is an enzyme that promotes the breakdown of starches during digestion. Which of the following describes the method by which amylase functions?

Accepted Answer

A)  It catalyzes starch breakdown without being changed or depleted.
B)  It functions as a hormone that signals for starch breakdown to begin.
C)  It inhibits chemical reactions by being changed or depleted by the starch.
D)  It changes its composition in order to break starch down itself.E) C) and D)
F) A) and D)

Question 8

CaCl₂ is dissolved in water. The chlorine that is released will be in the form of anions.

Accepted Answer

A) True 
 B)False

Question 9

An organic compound always contains

Accepted Answer

A)  carbon and hydrogen.
B)  oxygen and nitrogen.
C)  carbon and oxygen.
D)  nitrogen and hydrogen.E) B) and D)
F) A) and D)

Question 10

Which of these is not a monosaccharide?

Accepted Answer

A)  Glucose
B)  Ribose
C)  6-carbon sugar
D)  SucroseE) A) and D)
F) C) and D)

Question 11

The formula H₂O refers to

Accepted Answer

A)  two hydrogen molecules and one oxygen molecule.
B)  one hydrogen molecule and two oxygen molecules.
C)  a molecule that contains two hydrogen atoms and one oxygen atom.
D)  a molecule that contains one hydrogen atom and two oxygen atoms.E) All of the above
F) A) and B)

Question 12

Electrolytes are substances that

Accepted Answer

A)  form covalent bonds with water.
B)  ionize in water.
C)  cannot conduct electricity in solution.
D)  form bonds that are stable in water.E) B) and D)
F) All of the above

Question 13

Consider the following list of commonly found items and their pH values: Battery acid (1.0) , vinegar (2.2) , grapes (3.5-4.5) , tomato (4.0-4.5) , beer (4.2) , coffee (5.0) , white bread (5.0-6.0) , butter (6.1-6.4) , egg whites (7.6-8.0) , baking soda (8.3) , milk of magnesia (10.6) , bleach (12.8) 
Which of the following is closest to the pH of water?

Accepted Answer

A)  White bread
B)  Baking soda
C)  Egg whites
D)  GrapesE) None of the above
F) B) and C)

Question 14

The type of organic molecule that can replicate is a

Accepted Answer

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

Question 15

In the reaction between HCl and Ca(OH)₂, the product CaCl₂ will be a salt.

Accepted Answer

A) True 
 B)False

Question 16

Nucleic acids include

Accepted Answer

A)  proteins and DNA.
B)  RNA and DNA.
C)  enzymes and RNA.
D)  steroids and triglycerides.E) A) and C)
F) B) and D)

Question 17

When forming a bond, an atom that has 3 electrons in its second shell and a filled first shell will

Accepted Answer

A)  lose 3 electrons from its second shell.
B)  lose all of the electrons from its first shell.
C)  lose all of the electrons from both its first and second shells.
D)  gain 5 electrons in its second shell.E) B) and D)
F) B) and C)

Question 18

A person has alkalosis if the blood pH

Accepted Answer

A)  is above 7.0.
B)  is below 7.0.
C)  rises above 7.5.
D)  drops below 7.3.E) A) and B)
F) A) and C)

Question 19

The term conformation refers to:

Accepted Answer

A)  the three-dimensional shape of a molecule, such as a protein.
B)  the energy held in the bonds of an organic molecule, such as a protein.
C)  the ability of DNA to copy itself.
D)  the amino acid sequence (primary structure) of a protein.E) B) and D)
F) C) and D)

Question 20

A phospholipid differs structurally from a triglyceride in that it has three phosphate groups attached to the glycerol molecule rather than three fatty acid chains.

Accepted Answer

A) True 
 B)False

Exam 2: Chemical Basis of Life

On the pH scale

Correct Answer
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Electrolytes are substances that

Correct Answer
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The nitrogenous bases of DNA and RNA provide informational content because

Correct Answer
verified

A person has alkalosis if the blood pH

Correct Answer
verified

Nucleic acids include

Correct Answer
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Correct Answer
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Which of the following is characteristic of carbohydrates?

Correct Answer
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The type of organic molecule that can replicate is a

Correct Answer
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Which of these is not a monosaccharide?

Correct Answer
verified

When forming a bond, an atom that has 3 electrons in its second shell and a filled first shell will

Correct Answer
verified

In the reaction between HCl and Ca(OH)₂, the product CaCl₂ will be a salt.

Correct Answer
verified

Chemistry is the study of the composition of matter and how matter changes.

Correct Answer
verified

A phospholipid differs structurally from a triglyceride in that it has three phosphate groups attached to the glycerol molecule rather than three fatty acid chains.

Correct Answer
verified

The formula H₂O refers to

Correct Answer
verified

When K⁺ and Cl⁻ meet, they will

Correct Answer
verified

The term conformation refers to:

Correct Answer
verified

CaCl₂ is dissolved in water. The chlorine that is released will be in the form of anions.

Correct Answer
verified

Amylase is an enzyme that promotes the breakdown of starches during digestion. Which of the following describes the method by which amylase functions?

Correct Answer
verified

A simple carbohydrate

Correct Answer
verified

An organic compound always contains

Correct Answer
verified

Exam 2: Chemical Basis of Life

On the pH scale

Correct AnswerverifiedShow Answer

Electrolytes are substances that

Correct AnswerverifiedShow Answer

The nitrogenous bases of DNA and RNA provide informational content because

Correct AnswerverifiedShow Answer

A person has alkalosis if the blood pH

Correct AnswerverifiedShow Answer

Nucleic acids include

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Which of the following is characteristic of carbohydrates?

Correct AnswerverifiedShow Answer

The type of organic molecule that can replicate is a

Correct AnswerverifiedShow Answer

Which of these is not a monosaccharide?

Correct AnswerverifiedShow Answer

When forming a bond, an atom that has 3 electrons in its second shell and a filled first shell will

Correct AnswerverifiedShow Answer

In the reaction between HCl and Ca(OH)₂, the product CaCl₂ will be a salt.

Correct AnswerverifiedShow Answer

Chemistry is the study of the composition of matter and how matter changes.

Correct AnswerverifiedShow Answer

A phospholipid differs structurally from a triglyceride in that it has three phosphate groups attached to the glycerol molecule rather than three fatty acid chains.

Correct AnswerverifiedShow Answer

The formula H₂O refers to

Correct AnswerverifiedShow Answer

When K⁺ and Cl⁻ meet, they will

Correct AnswerverifiedShow Answer

The term conformation refers to:

Correct AnswerverifiedShow Answer

CaCl₂ is dissolved in water. The chlorine that is released will be in the form of anions.

Correct AnswerverifiedShow Answer

Amylase is an enzyme that promotes the breakdown of starches during digestion. Which of the following describes the method by which amylase functions?

Correct AnswerverifiedShow Answer

A simple carbohydrate

Correct AnswerverifiedShow Answer

An organic compound always contains

Correct AnswerverifiedShow Answer

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