Question 1

Enzymes are able to speed up the rate of a reaction by

Accepted Answer

A)   transferring electrons from one substance to another.
B)   binding substrates to a membrane.
C)   producing more enzymes.
D)   lowering the energy needed for the reaction to proceed.
E)   producing more substrates.F) A) and B)
G) B) and D)

Question 2

Which of the following statements about ATP is inaccurate?

Accepted Answer

A)   ATP is formed when energy is released during cell respiration.
B)   When ATP becomes ADP + P, the amount of energy released is enough for a biological purpose.
C)   ATP is comprised of a sugar, base, and two phosphate groups.
D)   ATP contains the energy form used for cellular work.
E)   ADP is lower in potential energy than ATP.F) A) and E)
G) A) and B)

Question 3

The changing of an enzyme's shape as the substrate binds to the active site is called the

Accepted Answer

A)   substrate binding theory.
B)   induced fit model.
C)   metabolic pathway.
D)   energy of activation.
E)   enzyme binding theory.F) C) and D)
G) None of the above

Question 4

Which of these words should be classified separately from the others?

Accepted Answer

A)   osmosis
B)   diffusion
C)   passive transport
D)   active transport
E)   facilitated diffusionF) B) and D)
G) None of the above

Question 5

Which of the following is a passive process?

Accepted Answer

A)   diffusion
B)   sodium/potassium pump
C)   pinocytosis
D)   phagocytosis
E)   exocytosisF) A) and E)
G) A) and B)

Question 6

Intestinal cells absorb glucose via active transport. What would happen if all the mitochondria within these intestinal cells were destroyed?

Accepted Answer

A)   Glucose absorption would increase.
B)   The cells would switch to sucrose.
C)   Glucose absorption would decrease.
D)   Glucose absorption would not be affected.
E)   Glucose absorption would be slow at first and then increase.F) C) and D)
G) A) and B)

Question 7

Which form of passive transport allows small noncharged molecules, such as oxygen, to cross the cell membrane?

Accepted Answer

A)   diffusion
B)   osmosis
C)   plasmolysis
D)   phagocytosis
E)   pinocytosisF) A) and E)
G) B) and E)

Question 8

Where within the cell is the majority of ATP produced?

Accepted Answer

A)   mitochondria
B)   cytoplasm
C)   nucleus
D)   endoplasmic reticulum
E)   Golgi bodyF) A) and D)
G) A) and C)

Question 9

A tube with a membrane covering the bottom is placed in a beaker. The membrane allows water to flow through but not salt or glucose. The tube contains an aqueous solution with4% salt and 20% glucose and the beaker contains an aqueous solution with 12% salt and 6% glucose. How could you describe the solution in the beaker compared to the solution in the tube?

Accepted Answer

A)   The beaker solution is hypertonic to the tube solution.
B)   The beaker solutionishypotonic to the tube solution.
C)   The beaker and tube solutions are isotonic to each other.
D)   The beaker solution issweeter than the tube solution.
E)   The beaker contents and the tube contents will not change.F) C) and D)
G) C) and E)

Question 10

Which of the types of cellular activities listed below can proceed without ATP energy?

Accepted Answer

A)   active transport
B)   muscular contraction
C)   flagella movement
D)   passive transport
E)   protein synthesisF) A) and D)
G) A) and E)

Question 11

What function do the carrier proteins embedded in the cell membrane serve?

Accepted Answer

A)   simple diffusion
B)   facilitated diffusion
C)   support for the membrane
D)   receptor for hormone molecules
E)   osmosisF) A) and E)
G) A) and D)

Question 12

In feedback inhibition of a metabolic pathway, where does the inhibitor bind?

Accepted Answer

A)   to the first enzyme in the pathway
B)   to the first substrate in the pathway
C)   to the first product produced in the pathway
D)   to the last enzyme of the pathway
E)   to the last substrate in the pathwayF) A) and E)
G) A) and D)

Question 13

Pickles are often preserved in a 20-30% salt solution called brine. How does this method prevent contamination by microorganisms?

Accepted Answer

A)   Bacteria can't survive in a hypertonic solution because they lose water.
B)   Bacteria can't survive in hypotonic solutions because of the added pressure of the water they take in.
C)   Bacteria cells are unable to digest the salt, thus killing the cells by starvation.
D)   The high-salt concentration increases the pH of the environment, making it unfavorable for bacteria to live there.
E)   The high-salt concentration creates an isotonic environment that the bacteria cannot live in.F) A) and E)
G) C) and E)

Question 14

Once the substrate moves into the active site of the enzyme,

Accepted Answer

A)   the enzyme breaks the substrate into three products.
B)   the two molecules fuse together to form the product.
C)   the enzyme alters in shape to more closely fit the substrate.
D)   the substrate alters shape to more closely fit the active site.
E)   the substrate and enzyme both alter shape to fit together.F) B) and E)
G) B) and D)

Question 15

Which of the following is an example of kinetic energy?

Accepted Answer

A)   the energy in a glucose molecule
B)   the energy contained in a rock sitting at the top of a cliff
C)   the skier traveling downhill
D)   the energy contained in a hamburger
E)   the energy of a diver standing on a diving boardF) All of the above
G) C) and D)

Question 16

Enzymes are usually named based on the substrate that they bind. This is possible because

Accepted Answer

A)   enzymes all have the same shape.
B)   each type of enzyme binds only one specific substrate.
C)   enzymes are used up in the reaction.
D)   an enzyme is only associated with one metabolic pathway.
E)   enzymes speed up the rate of a reaction.F) All of the above
G) A) and D)

Question 17

Simple diffusion of molecules occurs

Accepted Answer

A)   from an area of lesser concentration to an area of greater concentration.
B)   in nonliving systems as well as living systems.
C)   across plasma membranes only through transport proteins.
D)   until those molecules are more highly concentrated on one side of the plasma membrane.
E)   only in molecules that are in a gaseous state.F) A) and D)
G) B) and E)

Question 18

Energy of activation

Accepted Answer

A)   is the energy required for molecules to react with each other.
B)   requires the use of enzymes.
C)   allows for feedback inhibition.
D)   acts on the products of metabolic reactions.
E)   is a measure of the amount of solar radiation striking a leaf surface.F) B) and C)
G) D) and E)

Question 19

What process typically regulates the enzymes involved in metabolic reactions?

Accepted Answer

A)   substrate inhibition
B)   pH change
C)   ATP blockage
D)   feedback inhibition
E)   temperature levelsF) B) and E)
G) A) and B)

Question 20

What process allows water to move across a cellmembrane?

Accepted Answer

A)   osmosis
B)   active transport
C)   phagocytosis
D)   facilitated diffusion
E)   passive transportF) A) and B)
G) A) and E)

Exam 5: The Dynamic Cell

Pickles are often preserved in a 20-30% salt solution called brine. How does this method prevent contamination by microorganisms?

Correct Answer
verified

Intestinal cells absorb glucose via active transport. What would happen if all the mitochondria within these intestinal cells were destroyed?

Correct Answer
verified

Which of the following is a passive process?

Correct Answer
verified

The changing of an enzyme's shape as the substrate binds to the active site is called the

Correct Answer
verified

Which of the following is an example of kinetic energy?

Correct Answer
verified

Which form of passive transport allows small noncharged molecules, such as oxygen, to cross the cell membrane?

Correct Answer
verified

In feedback inhibition of a metabolic pathway, where does the inhibitor bind?

Correct Answer
verified

What function do the carrier proteins embedded in the cell membrane serve?

Correct Answer
verified

Correct Answer
verified

Enzymes are usually named based on the substrate that they bind. This is possible because

Correct Answer
verified

Energy of activation

Correct Answer
verified

Which of these words should be classified separately from the others?

Correct Answer
verified

What process allows water to move across a cellmembrane?

Correct Answer
verified

Which of the following statements about ATP is inaccurate?

Correct Answer
verified

Simple diffusion of molecules occurs

Correct Answer
verified

Which of the types of cellular activities listed below can proceed without ATP energy?

Correct Answer
verified

Once the substrate moves into the active site of the enzyme,

Correct Answer
verified

What process typically regulates the enzymes involved in metabolic reactions?

Correct Answer
verified

Enzymes are able to speed up the rate of a reaction by

Correct Answer
verified

Where within the cell is the majority of ATP produced?

Correct Answer
verified

Exam 5: The Dynamic Cell

Pickles are often preserved in a 20-30% salt solution called brine. How does this method prevent contamination by microorganisms?

Correct AnswerverifiedShow Answer

Intestinal cells absorb glucose via active transport. What would happen if all the mitochondria within these intestinal cells were destroyed?

Correct AnswerverifiedShow Answer

Which of the following is a passive process?

Correct AnswerverifiedShow Answer

The changing of an enzyme's shape as the substrate binds to the active site is called the

Correct AnswerverifiedShow Answer

Which of the following is an example of kinetic energy?

Correct AnswerverifiedShow Answer

Which form of passive transport allows small noncharged molecules, such as oxygen, to cross the cell membrane?

Correct AnswerverifiedShow Answer

In feedback inhibition of a metabolic pathway, where does the inhibitor bind?

Correct AnswerverifiedShow Answer

What function do the carrier proteins embedded in the cell membrane serve?

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Enzymes are usually named based on the substrate that they bind. This is possible because

Correct AnswerverifiedShow Answer

Energy of activation

Correct AnswerverifiedShow Answer

Which of these words should be classified separately from the others?

Correct AnswerverifiedShow Answer

What process allows water to move across a cellmembrane?

Correct AnswerverifiedShow Answer

Which of the following statements about ATP is inaccurate?

Correct AnswerverifiedShow Answer

Simple diffusion of molecules occurs

Correct AnswerverifiedShow Answer

Which of the types of cellular activities listed below can proceed without ATP energy?

Correct AnswerverifiedShow Answer

Once the substrate moves into the active site of the enzyme,

Correct AnswerverifiedShow Answer

What process typically regulates the enzymes involved in metabolic reactions?

Correct AnswerverifiedShow Answer

Enzymes are able to speed up the rate of a reaction by

Correct AnswerverifiedShow Answer

Where within the cell is the majority of ATP produced?

Correct AnswerverifiedShow Answer

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