Question 1

Match between columns
                        Premises: lowers the activation energy of a reaction

Accepted Answer

The Answer of feedback inhibition and cofactor and adenosine triphosphate is...

Question 2

NAD+ is considered a(n)____.

Accepted Answer

A) enzyme 
B) coenzyme 
C) regulatory molecule 
D) active site 
E) intermediate 
A) enzyme 
B) coenzyme 
C) regulatory molecule 
D) active site 
E) intermediate

Question 3

Match between columns
                        Premises: attaching a phosphate group by forming a higher energy bond

Accepted Answer

The Answer of electron transfer chain and feedback inhibition and is...

Question 4

Which of the following occurs in feedback inhibition?

Accepted Answer

A) Coenzymes block enzyme activity. 
B) Products of metabolic reactions block enzyme activity. 
C) NADH is altered in electron transport chains. 
D) ADP is phosphorylated. 
E) Low reactant concentrations decrease enzyme activity. 
A) Coenzymes block enzyme activity. 
B) Products of metabolic reactions block enzyme activity. 
C) NADH is altered in electron transport chains. 
D) ADP is phosphorylated. 
E) Low reactant concentrations decrease enzyme activity.

Question 5

The minimum amount of energy needed to get a chemical reaction started is called the ____ energy.

Accepted Answer

A) activation 
B) reaction 
C) enzymatic 
D) chemical 
E) triggering 
A) activation 
B) reaction 
C) enzymatic 
D) chemical 
E) triggering

Question 6

Based on the graph above for the pH profile for GlyFa1, an enzyme used by a species of bacteria that lives in California copper mines, what is the optimal pH for GlyFa1 activity?

Accepted Answer

A) 0 
B) 1 
C) 2 
D) 4 
E) 6 
A) 0 
B) 1 
C) 2 
D) 4 
E) 6

Question 7

Match between columns
                        Premises: molecule that enters a reaction

Accepted Answer

The Answer of reaction and reactant and activation energy and is...

Question 8

The net direction that an ion or molecule moves is ____.

Accepted Answer

A) dependent upon the size of the molecule 
B) unpredictable because the movement is random 
C) the result of concentration differences 
D) controlled by the temperature of the medium 
E) controlled by the membranes in the vicinity 
A) dependent upon the size of the molecule 
B) unpredictable because the movement is random 
C) the result of concentration differences 
D) controlled by the temperature of the medium 
E) controlled by the membranes in the vicinity

Question 9

A solute passively diffuses through a transport protein out of the cell, therefore, ____.

Accepted Answer

A) the concentration of the solute is higher inside the cell than outside it 
B) the concentration of the solute is lower inside the cell than outside it 
C) the concentration of the solute is the same inside and outside the cell 
D) the concentration of water is higher inside the cell than outside it 
E) the concentration of water is lower inside the cell than outside it 
A) the concentration of the solute is higher inside the cell than outside it 
B) the concentration of the solute is lower inside the cell than outside it 
C) the concentration of the solute is the same inside and outside the cell 
D) the concentration of water is higher inside the cell than outside it 
E) the concentration of water is lower inside the cell than outside it

Question 10

Which of the following is an example of the second law of thermodynamics?

Accepted Answer

A) Conversion of the energy in sunlight into glucose 
B) The use of gasoline to propel your car 
C) ATP activation of a proton pump. 
D) A light bulb heats up after use 
E) A nuclear reactor lights up the city. 
A) Conversion of the energy in sunlight into glucose 
B) The use of gasoline to propel your car 
C) ATP activation of a proton pump. 
D) A light bulb heats up after use 
E) A nuclear reactor lights up the city.

Question 11

Energy is defined as ____.

Accepted Answer

A) the capacity to do work 
B) the movement of atoms and molecules 
C) movement of electrons 
D) measurement of food intake 
E) capacity to store sugar 
A) the capacity to do work 
B) the movement of atoms and molecules 
C) movement of electrons 
D) measurement of food intake 
E) capacity to store sugar

Question 12

The graph above shows the temperature profile for T. aquaticus polymerase, an enzyme used by a species of bacteria that lives in hot springs. What does the boxed region indicate?

Accepted Answer

A) The enzyme activity increases as substrates increase their kinetic energy. 
B) The enzyme activity decreases as substrates increase their kinetic energy. 
C) The enzyme activity increases as the enzyme denatures. 
D) The enzyme activity decreases as the enzyme denatures. 
E) The enzyme activity decreases as the enzyme refolds. 
A) The enzyme activity increases as substrates increase their kinetic energy. 
B) The enzyme activity decreases as substrates increase their kinetic energy. 
C) The enzyme activity increases as the enzyme denatures. 
D) The enzyme activity decreases as the enzyme denatures. 
E) The enzyme activity decreases as the enzyme refolds.

Question 13

The enzyme that is part of the metabolic pathway that breaks down alcohol is called ____.

Accepted Answer

A) alcohol dehydrogenase 
B) alcohol oxidase 
C) ethanol peroxidase 
D) liver catalase 
E) ethanol protease 
A) alcohol dehydrogenase 
B) alcohol oxidase 
C) ethanol peroxidase 
D) liver catalase 
E) ethanol protease

Question 14

The energy that fuels most life on earth comes from ____.

Accepted Answer

A) the sun 
B) heat 
C) sucrose 
D) water 
E) glucose 
A) the sun 
B) heat 
C) sucrose 
D) water 
E) glucose

Question 15

An enzyme's specificity is based on ____.

Accepted Answer

A) the shape of its active site 
B) the amount of activation energy it requires 
C) the number of amino acids in its structure 
D) the nature of its cofactors 
E) the conformation of the products 
A) the shape of its active site 
B) the amount of activation energy it requires 
C) the number of amino acids in its structure 
D) the nature of its cofactors 
E) the conformation of the products

Question 16

A plant wilts when ____.

Accepted Answer

A) the soil water becomes hypotonic with respect to the cytoplasm 
B) the soil water becomes hypertonic with respect to the cytoplasm 
C) the turgor inside the cell increases 
D) the turgor in the soil disappears 
E) osmotic pressure is equal to the turgor pressure 
A) the soil water becomes hypotonic with respect to the cytoplasm 
B) the soil water becomes hypertonic with respect to the cytoplasm 
C) the turgor inside the cell increases 
D) the turgor in the soil disappears 
E) osmotic pressure is equal to the turgor pressure

Question 17

Consider the ADH reaction below, and answer the following question. ADH stands for alcohol dehydrogenase.
 
In the reaction above, ethanol represents the ____.

Accepted Answer

A) enzyme 
B) reactant 
C) product 
D) activation energy 
E) trigger 
A) enzyme 
B) reactant 
C) product 
D) activation energy 
E) trigger

Question 18

Osmosis involves the movement of ____ across a semi-permeable membrane from an area of ____.

Accepted Answer

A) solutes; high solute concentration to an area of low solute concentration 
B) water; high solute concentration to an area of low solute concentration 
C) solvents; high solute concentration to an area of low solute concentration 
D) solutes; low solute concentration to an area of high solute concentration 
E) water; low solute concentration to an area of high solute concentration 
A) solutes; high solute concentration to an area of low solute concentration 
B) water; high solute concentration to an area of low solute concentration 
C) solvents; high solute concentration to an area of low solute concentration 
D) solutes; low solute concentration to an area of high solute concentration 
E) water; low solute concentration to an area of high solute concentration

Question 19

Match between columns
                        Premises: The process by which a lysosome expels its contents into the extracellular environment.

Accepted Answer

The Answer of osmosis and exocytosis and active transport and is...

Question 20

Red blood cells contain 2% salt. What will happen when the cell is placed in a 10% salt solution?

Accepted Answer

A) The cell will burst. 
B) The cell will shrink. 
C) The cell will remain unchanged, but salt will diffuse out of the cell. 
D) The cell will remain unchanged, but salt will diffuse into the cell. 
E) The cell will remain unchanged, but water will diffuse out of the cell. 
A) The cell will burst. 
B) The cell will shrink. 
C) The cell will remain unchanged, but salt will diffuse out of the cell. 
D) The cell will remain unchanged, but salt will diffuse into the cell. 
E) The cell will remain unchanged, but water will diffuse out of the cell.

Exam 4: Energy and Metabolism

NAD+ is considered a(n)____.

Which of the following occurs in feedback inhibition?

The minimum amount of energy needed to get a chemical reaction started is called the ____ energy.

Based on the graph above for the pH profile for GlyFa1, an enzyme used by a species of bacteria that lives in California copper mines, what is the optimal pH for GlyFa1 activity?

The net direction that an ion or molecule moves is ____.

A solute passively diffuses through a transport protein out of the cell, therefore, ____.

Which of the following is an example of the second law of thermodynamics?

Energy is defined as ____.

The graph above shows the temperature profile for T. aquaticus polymerase, an enzyme used by a species of bacteria that lives in hot springs. What does the boxed region indicate?

The enzyme that is part of the metabolic pathway that breaks down alcohol is called ____.

The energy that fuels most life on earth comes from ____.

An enzyme's specificity is based on ____.

A plant wilts when ____.

Consider the ADH reaction below, and answer the following question. ADH stands for alcohol dehydrogenase. In the reaction above, ethanol represents the ____.

Osmosis involves the movement of ____ across a semi-permeable membrane from an area of ____.

Red blood cells contain 2% salt. What will happen when the cell is placed in a 10% salt solution?

Invitation to Biology

Molecules of Life

Cell Structure

Capturing and Releasing Energy

Dna Structure and Function

Gene Expression and Control

How Cells Reproduce

Patterns of Inheritance

Biotechnology

Evidence of Evolution

Processes of Evolution

Early Life Forms and the Viruses

Plants and Fungi

Animal Evolution

Population Ecology

Communities and Ecosystems

The Biosphere and Human Effects

Animal Tissues and Organs

How Animals Move

Circulation and Respiration

Immunity

Digestion and Excretion

Neural Control and the Senses

Endocrine Control

Reproduction and Development

Plant Form and Function

Plant Reproduction and Development

Filters

NAD⁺ is considered a(n)____.

Osmosis involves the movement of across a semi-permeable membrane from an area of .