Question 1

The isotope 146C has

Accepted Answer

A)   14 electrons.
B)   6 neutrons.
C)   8 protons.
D)   8 neutrons.
E)   8 electrons.F) B) and D)
G) C) and E)

Question 2

Which of the following statements about hydrogen bonding is incorrect?

Accepted Answer

A)   Hydrogen bonding occurs only between water molecules.
B)   Hydrogen bonds are easily broken.
C)   Hydrogen bonding can occur between different molecules or within the same molecule.
D)   Most hydrogen bonds involve hydrogen and oxygen or nitrogen.
E)   The structure of a large, complex molecule can be influenced by hydrogen bonding.F) A) and E)
G) A) and D)

Question 3

Potassium hydroxide (KOH) almost completely dissociates in aqueous solution into K+ and OH- and is therefore a

Accepted Answer

A)   strong acid.
B)   strong base.
C)   weak base.
D)   weak acid.
E)   nonpolar covalent molecule.F) B) and C)
G) A) and E)

Question 4

One carbon atom can form covalent bonds with up to ___ other atoms to form an organic molecule.

Accepted Answer

A)   2
B)   3
C)   4
D)   6
E)   8F) None of the above
G) A) and B)

Question 5

Which of the following molecules is NOT a compound?

Accepted Answer

A)   H2O
B)   HCl
C)   H2
D)   C6H12O6
E)   NaOHF) A) and E)
G) B) and C)

Question 6

Which of the following radiation uses is the one that is most likely to have beneficial and harmful consequences?

Accepted Answer

A)   Using radiation to treat a cancer patient.
B)   Using radiation to sterilize mail.
C)   Using radiation to sterilize surgical equipment prior to a surgery.
D)   Radiating fruits and vegetables prior to storage.
E)   All of these will have beneficial and harmful consequences.F) C) and D)
G) A) and C)

Question 7

When an ionic bond forms,electrons are

Accepted Answer

A)   lost from both atoms.
B)   gained by both atoms.
C)   shared equally by both atoms.
D)   totally lost from the paired atoms.
E)   transferred from one atom to another.F) B) and D)
G) C) and D)

Question 8

To measure the activity of the human brain during certain thought processes,a short-lived radioactive sugar is injected in the carotid artery and is utilized by those cells that are most active.This shows up on a PET scan and demonstrates the detection of

Accepted Answer

A)   ionic bonds.
B)   high levels of radiation.
C)   covalent bonds.
D)   neutrons.
E)   isotopes.F) B) and E)
G) All of the above

Question 9

In the search to discover the agents that cause mad cow disease,scrapie in sheep,and CJD and kuru in humans,diseased brain tissues were passed through a fine filter to remove bacteria.The filtrate was still infectious,indicating that something smaller than bacteria,either viruses or organic molecules,must be the causative agent.If a virus were responsible for these brain diseases,then the infectious agent would contain either RNA or DNA.Other possibilities were that the agent was a carbohydrate,fat,or protein.Tissue filtrates were treated with agents that destroyed just one of these chemicals and then injected into a healthy animal,with the results as follows.What is the infectious agent? 
 ∙\bullet∙ Amylase digests carbohydrates; tissue filtrate still infects healthy test animal.
 ∙\bullet∙ Lipase digests fats; tissue filtrate still infects healthy test animal.
 ∙\bullet∙ Formaldehyde and/or heat denatures DNA and RNA; tissue filtrate still infects healthy test animal.
 ∙\bullet∙ Trypsin digests protein; tissue filtrate does not infect healthy test animal.

Accepted Answer

A)   carbohydrate
B)   fat
C)   protein
D)   DNA or RNA
E)   Could be carbohydrate, fat, or DNA or RNA but not protein. F) B) and D)
G) C) and D)

Question 10

The lower the pH

Accepted Answer

A)   the lower the hydrogen ion (H+)  concentration.
B)   the more acidic the solution.
C)   the higher the pH.
D)   the greater the hydroxide ion (OH-)  concentration.
E)   the closer the hydroxide ion (OH-)  concentration comes to equaling the hydrogen ion (H+)  concentration.F) D) and E)
G) B) and E)

Question 11

What type of reaction is necessary to produce a dipeptide from individual amino acids?

Accepted Answer

A)   dehydration reaction
B)   hydrolysis reaction
C)   denaturation
D)   Dipeptides are not formed from amino acids.
E)   None of these reactions will form a dipeptide.F) C) and D)
G) A) and B)

Question 12

The moon lacks life and varies dramatically in temperature.If we could keep a layer of water spread on the surface of the moon,what effect would it have?

Accepted Answer

A)   Life would be possible but it would have to withstand these extremes in temperature.
B)   Water would absorb and hold heat and moderate the temperature extremes.
C)   The temperatures would drop to the lower extremes.
D)   Because water has a high heat of vaporization, the temperatures would rise to the upper extremes.
E)   Physical conditions would remain the same.F) B) and D)
G) A) and B)

Question 13

Since pure water is neutral,it contains

Accepted Answer

A)   no hydrogen ions (H+) .
B)   no hydroxide ions (OH-) .
C)   neither hydrogen ions (H+)  nor hydroxide ions (OH-) .
D)   an equal number of hydrogen ions (H+)  and hydroxide ions (OH-) .
E)   seven times more hydrogen ions (H+)  than hydroxide ions (OH-) .F) C) and E)
G) A) and D)

Question 14

Hydrolysis of a fat results in the formation of

Accepted Answer

A)   glycerol only.
B)   fatty acids only.
C)   glucose only.
D)   two monosaccharides.
E)   both glycerol and fatty acids.F) A) and E)
G) B) and C)

Question 15

Which of the following subatomic particles will be found within the nucleus of the atom?

Accepted Answer

A)   protons & neutrons
B)   protons & electrons
C)   electrons & neutrons
D)   only neutrons
E)   only protonsF) A) and E)
G) B) and E)

Question 16

Briefly describe how ATP is broken down and turned into ADP.

Accepted Answer

Answers will vary but should include the...

Question 17

Organic molecules

Accepted Answer

A)   always contain carbon.
B)   always contain hydrogen.
C)   always contain carbon and hydrogen.
D)   are found only in organisms, hence their name.
E)   are always food molecules.F) C) and D)
G) B) and D)

Question 18

The difference between 126C and 146C is

Accepted Answer

A)   the number of electrons.
B)   the number of protons.
C)   the number of neutrons.
D)   the number of carbon atoms.
E)   the number of ionic bonds.F) C) and E)
G) A) and B)

Question 19

The structure shown in Figure 2.24 is

Accepted Answer

A)   a glucose molecule.
B)   a fatty acid molecule.
C)   a glycerol molecule.
D)   a protein molecule.
E)   an amino acid.F) None of the above
G) All of the above

Question 20

Which functional groups are associated with a dehydration reaction?

Accepted Answer

A)   H & OH
B)   H & SH
C)   OH & NHH
D)   SH & OH
E)   COOH & SHF) A) and B)
G) A) and C)

Exam 2: The Molecules of Cells

Which of the following radiation uses is the one that is most likely to have beneficial and harmful consequences?

Correct Answer
verified

The moon lacks life and varies dramatically in temperature.If we could keep a layer of water spread on the surface of the moon,what effect would it have?

Correct Answer
verified

The structure shown in Figure 2.24 is

Correct Answer
verified

To measure the activity of the human brain during certain thought processes,a short-lived radioactive sugar is injected in the carotid artery and is utilized by those cells that are most active.This shows up on a PET scan and demonstrates the detection of

Correct Answer
verified

Since pure water is neutral,it contains

Correct Answer
verified

Correct Answer
verified

Which of the following molecules is NOT a compound?

Correct Answer
verified

The difference between ¹²₆C and ¹⁴₆C is

Correct Answer
verified

One carbon atom can form covalent bonds with up to ___ other atoms to form an organic molecule.

Correct Answer
verified

Which of the following statements about hydrogen bonding is incorrect?

Correct Answer
verified

What type of reaction is necessary to produce a dipeptide from individual amino acids?

Correct Answer
verified

The isotope ¹⁴₆C has

Correct Answer
verified

The lower the pH

Correct Answer
verified

Which functional groups are associated with a dehydration reaction?

Correct Answer
verified

Briefly describe how ATP is broken down and turned into ADP.

Correct Answer
verified
Answers will vary but should include the...
View Answer

Potassium hydroxide (KOH) almost completely dissociates in aqueous solution into K⁺ and OH^- and is therefore a

Correct Answer
verified

Hydrolysis of a fat results in the formation of

Correct Answer
verified

Organic molecules

Correct Answer
verified

When an ionic bond forms,electrons are

Correct Answer
verified

Which of the following subatomic particles will be found within the nucleus of the atom?

Correct Answer
verified

Exam 2: The Molecules of Cells

Which of the following radiation uses is the one that is most likely to have beneficial and harmful consequences?

Correct AnswerverifiedShow Answer

The moon lacks life and varies dramatically in temperature.If we could keep a layer of water spread on the surface of the moon,what effect would it have?

Correct AnswerverifiedShow Answer

The structure shown in Figure 2.24 is

Correct AnswerverifiedShow Answer

To measure the activity of the human brain during certain thought processes,a short-lived radioactive sugar is injected in the carotid artery and is utilized by those cells that are most active.This shows up on a PET scan and demonstrates the detection of

Correct AnswerverifiedShow Answer

Since pure water is neutral,it contains

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Which of the following molecules is NOT a compound?

Correct AnswerverifiedShow Answer

The difference between 126C and 146C is

Correct AnswerverifiedShow Answer

One carbon atom can form covalent bonds with up to ___ other atoms to form an organic molecule.

Correct AnswerverifiedShow Answer

Which of the following statements about hydrogen bonding is incorrect?

Correct AnswerverifiedShow Answer

What type of reaction is necessary to produce a dipeptide from individual amino acids?

Correct AnswerverifiedShow Answer

The isotope 146C has

Correct AnswerverifiedShow Answer

The lower the pH

Correct AnswerverifiedShow Answer

Which functional groups are associated with a dehydration reaction?

Correct AnswerverifiedShow Answer

Briefly describe how ATP is broken down and turned into ADP.

Correct AnswerverifiedAnswers will vary but should include the...View AnswerShow Answer

Potassium hydroxide (KOH) almost completely dissociates in aqueous solution into K+ and OH- and is therefore a

Correct AnswerverifiedShow Answer

Hydrolysis of a fat results in the formation of

Correct AnswerverifiedShow Answer

Organic molecules

Correct AnswerverifiedShow Answer

When an ionic bond forms,electrons are

Correct AnswerverifiedShow Answer

Which of the following subatomic particles will be found within the nucleus of the atom?

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

The difference between ¹²₆C and ¹⁴₆C is

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

The isotope ¹⁴₆C has

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
Answers will vary but should include the...
View Answer

Potassium hydroxide (KOH) almost completely dissociates in aqueous solution into K⁺ and OH^- and is therefore a

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified