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. 
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.

Question 2

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. 
A)  substrate binding theory. 
B)  induced fit model. 
C)  metabolic pathway. 
D)  energy of activation. 
E)  enzyme binding theory.

Question 3

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)  pinocytosis 
A)  diffusion 
B)  osmosis 
C)  plasmolysis 
D)  phagocytosis 
E)  pinocytosis

Question 4

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. 
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.

Question 5

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 diffusion 
A)  osmosis 
B)  diffusion 
C)  passive transport 
D)  active transport 
E)  facilitated diffusion

Question 6

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. 
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.

Question 7

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 pathway 
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 pathway

Question 8

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. 
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.

Question 9

Where within the cell is the majority of ATP produced?

Accepted Answer

A)  mitochondria 
B)  cytoplasm 
C)  nucleus 
D)  endoplasmic reticulum 
E)  Golgi body 
A)  mitochondria 
B)  cytoplasm 
C)  nucleus 
D)  endoplasmic reticulum 
E)  Golgi body

Question 10

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 board 
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 board

Question 11

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. 
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.

Question 12

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. 
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.

Question 13

What process allows water to move across a cellmembrane?

Accepted Answer

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

Question 14

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 levels 
A)  substrate inhibition 
B)  pH change 
C)  ATP blockage 
D)  feedback inhibition 
E)  temperature levels

Question 15

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. 
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.

Question 16

Which of the following is a passive process?

Accepted Answer

A)  diffusion 
B)  sodium/potassium pump 
C)  pinocytosis 
D)  phagocytosis 
E)  exocytosis 
A)  diffusion 
B)  sodium/potassium pump 
C)  pinocytosis 
D)  phagocytosis 
E)  exocytosis

Question 17

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 synthesis 
A)  active transport 
B)  muscular contraction 
C)  flagella movement 
D)  passive transport 
E)  protein synthesis

Question 18

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. 
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.

Question 19

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

Question 20

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. 
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.

Exam 5: The Dynamic Cell

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

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

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

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

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

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

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

Which of the following statements about ATP is inaccurate?

Where within the cell is the majority of ATP produced?

Which of the following is an example of kinetic energy?

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

Energy of activation

What process allows water to move across a cellmembrane?

What process typically regulates the enzymes involved in metabolic reactions?

Simple diffusion of molecules occurs

Which of the following is a passive process?

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

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

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

Biology: the Science of Life

The Chemical Basis of Life

The Organic Molecules of Life

Inside the Cell

Energy for Life

Energy for Cells

Cellular Reproduction

Meiosis and the Genetic Basis of Sexual Reproduction

Patterns of Inheritance

Dna Biology

Biotechnology and Genomics

Mutations and Genetic Testing

Darwin and Evolution

Evolution on a Small Scale

Evolution on a Large Scale

Viruses, Bacteria, and Protists

Plants and Fungi

Animals

Plant Anatomy and Growth

Plant Responses and Reproduction

Being Organized and Steady

The Transport Systems

The Maintenance Systems

Digestion and Human Nutrition

Defenses Against Disease

The Control Systems

Sensory Input and Motor Output

Reproduction and Embryonic Development

Ecology and Populations

Communities and Ecosystems

Human Impact on the Biosphere

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