AP Biology Exam Book Questions and
Answers
Which of the following is correct about isotopes of carbon?
A) They are all radioactive.
B) They contain the same number of neutrons but a different number of protons.
C) They contain the same number of electrons but are chemically different because the number of
neutrons are different.
D) They are chemically identical because they have the same number of electrons.
D) They are chemically identical because they have the same number of electrons.
Isotopes- chemically identical, different # neutrons, same # electrons
All of the following are characteristics of water EXCEPT
A) Water has a relatively high boiling point
B) Water molecules have little attraction to each other
C) water is a universal solvent
D) ice is less dense than water
B) Water molecules have little attraction to each other
Water molecules have a lot of attraction (are polar)
The pH of blood
A) is normally close to 7.4
B) is strongly acidic
C) varies with the needs of the cells
D) is about 6.9
A) is normally close to 7.4
remains very close to 7.4 all the time, is maintained by bicarbonate buffering system
Chaperonins are involved with
Proper folding of proteins
Which of the following is stored in the human liver for energy?
A) glucose
B) glycogen
C) glycerol
D) glucagon
B) glycogen
glycogen stores sugars in liver
Which of the following is an example of a hydrogen bond?
A)the attraction between the oxygen of one water molecule and the hydrogen on an adjacent
molecule
B) the bond between hydrogen and carbon in glucose or any sugar
C) the peptide bond between amino acids
D) the intramolecular bond between hydrogen and oxygen within a molecule of water
A)the attraction between the oxygen of one water molecule and the hydrogen on an adjacent
molecule
, All of the following statements are correct about enzymes EXCEPT
A) they raise the energy of activation of all reactions
B) they enable reactions to occur at a relatively low temperature
C) they remain unchanged during a reaction
D) they are often located within the plasma membrane of the cell
A) they raise the energy of activation of all reactions
they lower the energy of activation, thus speeding up the reaction
Which statement is correct about pH?
A) there are no hydrogen ions in a strong basic solution
B) Pure water has a neutral pH of 7 because the concentration of hydrogen ions equals the
concentration of hydroxyl ions
C) the concentration of a solution with a pH of 5 is 5 times more acidic than a solution with pH 1
D) the concentration of hydrogen ions in a solution with a pH of 2 is 2,000 times more acidic than a
solution with pH of 4
B) Pure water has a neutral pH of 7 because the concentration of hydrogen ions equals the
concentration of hydroxyl ions
Which of the following can be used to determine the rate of an enzyme-catalyzed reaction?
A) the rate of substrate formed?
B) the decrease in temperature in the system
C) the rate of enzyme used up
D) the rate of substrate used up
D) the rate of substrate used up
What best describes the reaction shown below?
A+B----> AB+ energy
exergonic reaction
(catabolism breaks things down)
Which level of protein structure is most related to specificity?
tertiary (3D shape and function)
Purpose of Mitochondria
produces ATP
Purpose of Rough Endoplasmic Reticulum
Produces proteins
Purpose of Golgi Apparatus
Packages and secretes substances
Lysosomes
Contains hydrolytic enzymes
Answers
Which of the following is correct about isotopes of carbon?
A) They are all radioactive.
B) They contain the same number of neutrons but a different number of protons.
C) They contain the same number of electrons but are chemically different because the number of
neutrons are different.
D) They are chemically identical because they have the same number of electrons.
D) They are chemically identical because they have the same number of electrons.
Isotopes- chemically identical, different # neutrons, same # electrons
All of the following are characteristics of water EXCEPT
A) Water has a relatively high boiling point
B) Water molecules have little attraction to each other
C) water is a universal solvent
D) ice is less dense than water
B) Water molecules have little attraction to each other
Water molecules have a lot of attraction (are polar)
The pH of blood
A) is normally close to 7.4
B) is strongly acidic
C) varies with the needs of the cells
D) is about 6.9
A) is normally close to 7.4
remains very close to 7.4 all the time, is maintained by bicarbonate buffering system
Chaperonins are involved with
Proper folding of proteins
Which of the following is stored in the human liver for energy?
A) glucose
B) glycogen
C) glycerol
D) glucagon
B) glycogen
glycogen stores sugars in liver
Which of the following is an example of a hydrogen bond?
A)the attraction between the oxygen of one water molecule and the hydrogen on an adjacent
molecule
B) the bond between hydrogen and carbon in glucose or any sugar
C) the peptide bond between amino acids
D) the intramolecular bond between hydrogen and oxygen within a molecule of water
A)the attraction between the oxygen of one water molecule and the hydrogen on an adjacent
molecule
, All of the following statements are correct about enzymes EXCEPT
A) they raise the energy of activation of all reactions
B) they enable reactions to occur at a relatively low temperature
C) they remain unchanged during a reaction
D) they are often located within the plasma membrane of the cell
A) they raise the energy of activation of all reactions
they lower the energy of activation, thus speeding up the reaction
Which statement is correct about pH?
A) there are no hydrogen ions in a strong basic solution
B) Pure water has a neutral pH of 7 because the concentration of hydrogen ions equals the
concentration of hydroxyl ions
C) the concentration of a solution with a pH of 5 is 5 times more acidic than a solution with pH 1
D) the concentration of hydrogen ions in a solution with a pH of 2 is 2,000 times more acidic than a
solution with pH of 4
B) Pure water has a neutral pH of 7 because the concentration of hydrogen ions equals the
concentration of hydroxyl ions
Which of the following can be used to determine the rate of an enzyme-catalyzed reaction?
A) the rate of substrate formed?
B) the decrease in temperature in the system
C) the rate of enzyme used up
D) the rate of substrate used up
D) the rate of substrate used up
What best describes the reaction shown below?
A+B----> AB+ energy
exergonic reaction
(catabolism breaks things down)
Which level of protein structure is most related to specificity?
tertiary (3D shape and function)
Purpose of Mitochondria
produces ATP
Purpose of Rough Endoplasmic Reticulum
Produces proteins
Purpose of Golgi Apparatus
Packages and secretes substances
Lysosomes
Contains hydrolytic enzymes
