Question 1

A dipeptide can be broken into two amino acids by dehydration synthesis.

Accepted Answer

A) True 
 B)False

Question 2

When frying an egg,the protein albumin denatures and maintains only its ________ structure.

Accepted Answer

A)  tertiary
B)  secondary
C)  quaternary
D)  primaryE) B) and C)
F) A) and D)

Question 3

The acidity of a solution reflects the concentration of free hydrogen ions in the solution.

Accepted Answer

A) True 
 B)False

Question 4

With a family history of cardiovascular disease,which toast spread would be considered the most "heart healthy?"

Accepted Answer

A)  olive oil
B)  butter containing butterfat
C)  lard (pig fat) 
D)  margarine containing trans fatsE) A) and D)
F) A) and C)

Question 5

Which of the following does NOT describe uses for the ATP molecule?

Accepted Answer

A)  pigment structure
B)  mechanical work
C)  transport across membranes
D)  chemical workE) C) and D)
F) B) and D)

Question 6

Which of the following does NOT describe enzymes?

Accepted Answer

A)  Enzymes work by raising the energy of activation.
B)  Some enzymes are purely protein.
C)  Some enzymes are protein plus a cofactor.
D)  Each enzyme is chemically specific.E) A) and B)
F) A) and C)

Question 7

All chemical reactions are theoretically reversible.Comment on this statement.

Accepted Answer

It is possible to reverse any reaction i...

Question 8

The numbers listed represent the number of electrons in the first,second,and third energy levels,respectively.On this basis,which of the following is an unstable or reactive atom?

Accepted Answer

A)  2
B)  2,8
C)  2,8,1
D)  2,8,8E) A) and B)
F) None of the above C

Question 9

In the compound H2CO3,what do the numbers 2 and 3 represent?

Accepted Answer

The 2 indicates that there are...

Question 10

What type of chemical bond can form between an atom with 11 protons and an atom with 17 protons?

Accepted Answer

A)  polar covalent
B)  ionic
C)  non-polar covalent
D)  hydrogenE) All of the above
F) A) and B)

Question 11

How can DNA be used to "fingerprint" a suspect in a crime?

Accepted Answer

The DNA of a person is unique to that individual.By obtaining the DNA from nucleated cells from the crime scene (e.g.,blood,semen,other body tissues),enzymes may be used to break up the DNA into fragments.Because nearly everyone's DNA is different,it also breaks up into fragments differently.When the fragments are separated,they form patterns even more unique than fingerprint patterns.A match of suspect and crime scene DNA is strong evidence.

Question 12

Which of the following statements is FALSE?

Accepted Answer

A)  Chemical reactions progress at a faster rate when the reacting particles are present in higher numbers.
B)  Catalysts increase the rate of chemical reactions,sometimes while undergoing reversible changes in shape.
C)  Larger particles move faster than smaller ones and thus collide more frequently and more forcefully.
D)  Chemical reactions proceed more quickly at higher temperatures.E) None of the above
F) B) and C)

Question 13

Which of the following is incorrectly matched?

Accepted Answer

A)  monosaccharide; carbohydrate
B)  eicosanoid; triglyceride
C)  amino acid; protein
D)  nucleotide; nucleic acidE) C) and D)
F) A) and D)

Question 14

What does the formula C6H12O6 mean?

Accepted Answer

A)  The substance is a colloid.
B)  There are 6 calcium,12 hydrogen,and 6 oxygen atoms.
C)  The molecular weight is 24.
D)  There are,6 carbon,12 hydrogen,and 6 oxygen atoms.E) B) and C)
F) None of the above

Question 15

The genetic information is coded in DNA by the ________.

Accepted Answer

A)  sequence of the nucleotides
B)  three-dimensional structure of the double helix
C)  arrangement of the histones
D)  regular alteration of sugar and phosphate moleculesE) All of the above
F) C) and D)

Question 16

The lower the pH,the higher the hydrogen ion concentration.

Accepted Answer

A) True 
 B)False

Question 17

Phospholipids make up most of the lipid part of the cell membrane.Since water exists on both the outside and inside of a cell,which of the following phospholipid arrangements makes the most sense?

Accepted Answer

A)  a single layer of phospholipids with the polar heads facing outside the cell
B)  a single layer of phospholipids with the polar heads facing inside the cell
C)  two back-to-back phospholipid layers with the polar heads facing out on both sides
D)  two back-to-back phospholipid layers with the non-polar tails facing out on both sidesE) None of the above
F) All of the above

Question 18

Atom X has 17 protons.How many electrons are in its valence shell (outermost energy level) ?

Accepted Answer

A)  7
B)  3
C)  5
D)  10E) A) and B)
F) A) and C)

Question 19

Which of the following is a general function for a fibrous protein?

Accepted Answer

A)  protein management
B)  transport
C)  structural framework
D)  body defense
E)  catalysisF) B) and E)
G) A) and B)

Question 20

Which of the following would be regarded as an organic molecule?

Accepted Answer

A)  NaCl
B)  H2O
C)  CH4
D)  NaOHE) All of the above
F) B) and C) C

Exam 2: Chemistry Comes Alive

A dipeptide can be broken into two amino acids by dehydration synthesis.

Correct Answer
verified

When frying an egg,the protein albumin denatures and maintains only its ________ structure.

Correct Answer
verified

The acidity of a solution reflects the concentration of free hydrogen ions in the solution.

Correct Answer
verified

With a family history of cardiovascular disease,which toast spread would be considered the most "heart healthy?"

Correct Answer
verified

Which of the following does NOT describe uses for the ATP molecule?

Correct Answer
verified

Which of the following does NOT describe enzymes?

Correct Answer
verified

All chemical reactions are theoretically reversible.Comment on this statement.

Correct Answer
verified
It is possible to reverse any reaction i...
View Answer

The numbers listed represent the number of electrons in the first,second,and third energy levels,respectively.On this basis,which of the following is an unstable or reactive atom?

Correct Answer
verified
C

In the compound H2CO3,what do the numbers 2 and 3 represent?

Correct Answer
verified
The 2 indicates that there are...
View Answer

What type of chemical bond can form between an atom with 11 protons and an atom with 17 protons?

Correct Answer
verified

How can DNA be used to "fingerprint" a suspect in a crime?

Which of the following statements is FALSE?

Correct Answer
verified

Which of the following is incorrectly matched?

Correct Answer
verified

What does the formula C6H12O6 mean?

Correct Answer
verified

The genetic information is coded in DNA by the ________.

Correct Answer
verified

The lower the pH,the higher the hydrogen ion concentration.

Correct Answer
verified

Phospholipids make up most of the lipid part of the cell membrane.Since water exists on both the outside and inside of a cell,which of the following phospholipid arrangements makes the most sense?

Correct Answer
verified

Atom X has 17 protons.How many electrons are in its valence shell (outermost energy level) ?

Correct Answer
verified

Which of the following is a general function for a fibrous protein?

Correct Answer
verified

Which of the following would be regarded as an organic molecule?

Correct Answer
verified
C

Exam 2: Chemistry Comes Alive

A dipeptide can be broken into two amino acids by dehydration synthesis.

Correct AnswerverifiedShow Answer

When frying an egg,the protein albumin denatures and maintains only its ________ structure.

Correct AnswerverifiedShow Answer

The acidity of a solution reflects the concentration of free hydrogen ions in the solution.

Correct AnswerverifiedShow Answer

With a family history of cardiovascular disease,which toast spread would be considered the most "heart healthy?"

Correct AnswerverifiedShow Answer

Which of the following does NOT describe uses for the ATP molecule?

Correct AnswerverifiedShow Answer

Which of the following does NOT describe enzymes?

Correct AnswerverifiedShow Answer

All chemical reactions are theoretically reversible.Comment on this statement.

Correct AnswerverifiedIt is possible to reverse any reaction i...View AnswerShow Answer

The numbers listed represent the number of electrons in the first,second,and third energy levels,respectively.On this basis,which of the following is an unstable or reactive atom?

Correct AnswerverifiedC

In the compound H2CO3,what do the numbers 2 and 3 represent?

Correct AnswerverifiedThe 2 indicates that there are...View AnswerShow Answer

What type of chemical bond can form between an atom with 11 protons and an atom with 17 protons?

Correct AnswerverifiedShow Answer

How can DNA be used to "fingerprint" a suspect in a crime?

Which of the following statements is FALSE?

Correct AnswerverifiedShow Answer

Which of the following is incorrectly matched?

Correct AnswerverifiedShow Answer

What does the formula C6H12O6 mean?

Correct AnswerverifiedShow Answer

The genetic information is coded in DNA by the ________.

Correct AnswerverifiedShow Answer

The lower the pH,the higher the hydrogen ion concentration.

Correct AnswerverifiedShow Answer

Phospholipids make up most of the lipid part of the cell membrane.Since water exists on both the outside and inside of a cell,which of the following phospholipid arrangements makes the most sense?

Correct AnswerverifiedShow Answer

Atom X has 17 protons.How many electrons are in its valence shell (outermost energy level) ?

Correct AnswerverifiedShow Answer

Which of the following is a general function for a fibrous protein?

Correct AnswerverifiedShow Answer

Which of the following would be regarded as an organic molecule?

Correct AnswerverifiedC

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
It is possible to reverse any reaction i...
View Answer

Correct Answer
verified
C

Correct Answer
verified
The 2 indicates that there are...
View Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
C