Question 1

Why does wood keep burning once it is lit?

Accepted Answer

A)  Intermediates from the reaction drive the reaction forward. 
B)  Energy is given off during the reaction that drives the reaction forward. 
C)  The products have more energy than the reactants, therefore driving the reaction forward. 
D)  The reactants have more energy than the products, therefore driving the reaction forward. 
E)  The activation of the energy drives the reaction forward. 
A)  Intermediates from the reaction drive the reaction forward. 
B)  Energy is given off during the reaction that drives the reaction forward. 
C)  The products have more energy than the reactants, therefore driving the reaction forward. 
D)  The reactants have more energy than the products, therefore driving the reaction forward. 
E)  The activation of the energy drives the reaction forward. B

Question 2

The second law of thermodynamics states that ____.

Accepted Answer

A)  the energy of the universe is a constant 
B)  energy can be neither created nor destroyed 
C)  energy disperses spontaneously 
D)  energy transformations create a more orderly universe 
E)  energy and matter are the same thing 
A)  the energy of the universe is a constant 
B)  energy can be neither created nor destroyed 
C)  energy disperses spontaneously 
D)  energy transformations create a more orderly universe 
E)  energy and matter are the same thing C

Question 3

Regulatory factors that bind to enzymes ____.

Accepted Answer

A)  always increase enzyme activity 
B)  always decrease enzyme activity 
C)  alter the shape of the enzyme 
D)  alter the pH at which the enzyme works 
E)  alter the temperature at which the enzyme works 
A)  always increase enzyme activity 
B)  always decrease enzyme activity 
C)  alter the shape of the enzyme 
D)  alter the pH at which the enzyme works 
E)  alter the temperature at which the enzyme works C

Question 4

F. acidarmanus , a species of bacteria that lives in California copper mines, has adapted to its environment by altering the ____ at which its enzymes function.

Accepted Answer

A)  temperature 
B)  pH 
C)  light levels 
D)  substrate concentration 
E)  salt concentration 
A)  temperature 
B)  pH 
C)  light levels 
D)  substrate concentration 
E)  salt concentration

Question 5

A concentration gradient ceases to exist when ____.

Accepted Answer

A)  all molecules have moved from low concentration to high concentration 
B)  the membrane pores close 
C)  the temperature drops 
D)  there is equilibrium between the two sides of a membrane 
E)  bulk flow intervenes 
A)  all molecules have moved from low concentration to high concentration 
B)  the membrane pores close 
C)  the temperature drops 
D)  there is equilibrium between the two sides of a membrane 
E)  bulk flow intervenes

Question 6

The process by which a cell takes in a small amount of extracellular fluid and its contents by the ballooning inward of the plasma membrane is the definition of ____.

Accepted Answer

A)  endocytosis 
B)  exocytosis 
C)  phagocytosis 
D)  passive transport 
E)  osmosis 
A)  endocytosis 
B)  exocytosis 
C)  phagocytosis 
D)  passive transport 
E)  osmosis

Question 7

Heating up a reaction increases the speed of a reaction until the ____.

Accepted Answer

A)  enzyme denatures 
B)  heat changes the pH of the reaction 
C)  maximum speed is achieved 
D)  cofactors can ' t bind the enzyme 
E)  reaction begins to experience feedback inhibition 
A)  enzyme denatures 
B)  heat changes the pH of the reaction 
C)  maximum speed is achieved 
D)  cofactors can ' t bind the enzyme 
E)  reaction begins to experience feedback inhibition

Question 8

When ethanol (C2H5OH) and oxygen (O2) react together, they form carbon dioxide (CO2) and water (H2O). The resulting chemical reaction is: C 2 H 5 OH + 3O  2  → 2CO  2  + 3H 2 O
The coefficient in front of H2O indicates there are ____.

Accepted Answer

A)  three oxygen atoms in the reaction 
B)  three carbon atoms in the water 
C)  three water molecules in the reaction 
D)  six water molecules in the reaction 
E)  six oxygen atoms in the reaction 
A)  three oxygen atoms in the reaction 
B)  three carbon atoms in the water 
C)  three water molecules in the reaction 
D)  six water molecules in the reaction 
E)  six oxygen atoms in the reaction

Question 9

Match between columns
                        Premises: The process by which a lysosome expels its contents into the extracellular environment.
This process is used by single-celled amoeba to ingest and digest bacteria.
This process specifically moves water molecules across a semipermeable membrane.
This process explains the movement of molecules against their concentration gradient.
This process explains movement from areas of higher concentration to areas of lower concentration without the use of supplied energy.

Accepted Answer

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

Question 10

The initial event that triggers phagocytosis is when the ____.

Accepted Answer

A)  solute concentration is higher inside the cell than outside 
B)  solute concentrations is lower inside the cell than outside 
C)  target protein binds to the receptor 
D)  enzymes bind to the membrane 
E)  vesicles bud off from the membrane 
A)  solute concentration is higher inside the cell than outside 
B)  solute concentrations is lower inside the cell than outside 
C)  target protein binds to the receptor 
D)  enzymes bind to the membrane 
E)  vesicles bud off from the membrane

Question 11

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 12

In the given figure, the amount of energy symbolized by the line "A" would be the ____.

Accepted Answer

A)  reactant energy 
B)  product energy 
C)  cofactor energy 
D)  activation energy 
E)  intermediate energy 
A)  reactant energy 
B)  product energy 
C)  cofactor energy 
D)  activation energy 
E)  intermediate energy

Question 13

Osmosis is an example of ____.

Accepted Answer

A)  facilitated diffusion 
B)  passive transport 
C)  active transport 
D)  exocytosis 
E)  endocytosis 
A)  facilitated diffusion 
B)  passive transport 
C)  active transport 
D)  exocytosis 
E)  endocytosis

Question 14

A series of enzyme-mediated reactions by which cells build, remodel, or break down organic molecules is known as ____.

Accepted Answer

A)  energy carriers 
B)  metabolic pathways 
C)  the induced-fit model 
D)  intermediary compounds 
E)  activation 
A)  energy carriers 
B)  metabolic pathways 
C)  the induced-fit model 
D)  intermediary compounds 
E)  activation

Question 15

Cells store energy in the form of ____.

Accepted Answer

A)  sunlight 
B)  chloroplasts 
C)  carbon dioxide 
D)  glucose 
E)  water 
A)  sunlight 
B)  chloroplasts 
C)  carbon dioxide 
D)  glucose 
E)  water

Question 16

Consider the ADH reaction and answer the following question. ADH stands for alcohol dehydrogenase.   In this reaction, acetaldehyde 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 17

If the activation energy for a chemical reaction is very high, the ____.

Accepted Answer

A)  reaction will have an overall net gain of energy 
B)  reaction will have an overall net loss of energy 
C)  reaction will progress slowly 
D)  reaction will progress quickly 
E)  reactants have a lower energy than the products 
A)  reaction will have an overall net gain of energy 
B)  reaction will have an overall net loss of energy 
C)  reaction will progress slowly 
D)  reaction will progress quickly 
E)  reactants have a lower energy than the products

Question 18

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 19

The amount of turgor that is enough to stop osmosis is called ____.

Accepted Answer

A)  the wilting point 
B)  osmotic pressure 
C)  hypotonicity 
D)  expansion pressure 
E)  hypertonicity 
A)  the wilting point 
B)  osmotic pressure 
C)  hypotonicity 
D)  expansion pressure 
E)  hypertonicity

Question 20

Movement of substances that requires the expenditure of ATP molecules is called ____.

Accepted Answer

A)  facilitated diffusion 
B)  simple diffusion 
C)  osmosis 
D)  active transport 
E)  bulk flow 
A)  facilitated diffusion 
B)  simple diffusion 
C)  osmosis 
D)  active transport 
E)  bulk flow

Exam 4: Energy and Metabolism

Why does wood keep burning once it is lit?

The second law of thermodynamics states that ____.

Regulatory factors that bind to enzymes ____.

F. acidarmanus , a species of bacteria that lives in California copper mines, has adapted to its environment by altering the ____ at which its enzymes function.

A concentration gradient ceases to exist when ____.

The process by which a cell takes in a small amount of extracellular fluid and its contents by the ballooning inward of the plasma membrane is the definition of ____.

Heating up a reaction increases the speed of a reaction until the ____.

When ethanol (C2H5OH) and oxygen (O2) react together, they form carbon dioxide (CO2) and water (H2O). The resulting chemical reaction is: C 2 H 5 OH + 3O 2 → 2CO 2 + 3H 2 O The coefficient in front of H2O indicates there are ____.

The initial event that triggers phagocytosis is when the ____.

Which of the following occurs in feedback inhibition?

In the given figure, the amount of energy symbolized by the line "A" would be the ____.

Osmosis is an example of ____.

A series of enzyme-mediated reactions by which cells build, remodel, or break down organic molecules is known as ____.

Cells store energy in the form of ____.

Consider the ADH reaction and answer the following question. ADH stands for alcohol dehydrogenase. In this reaction, acetaldehyde represents the ____.

If the activation energy for a chemical reaction is very high, the ____.

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

The amount of turgor that is enough to stop osmosis is called ____.

Movement of substances that requires the expenditure of ATP molecules is called ____.

Invitation to Biology

Molecules of Life

Cell Structure

Photosynthesis

Releasing Chemical Energy

Dna Structure and Function

Gene Expression and Control

How Cells Reproduce

Patterns of Inheritance

Biotechnology

Evidence of Evolution

Processes of Evolution

Prokaryotes, Protists, and 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

Animal Reproduction and Development

Plant Form and Function

Life Cycles of Flowering Plants

Filters

When ethanol (C₂H₅OH) and oxygen (O₂) react together, they form carbon dioxide (CO₂) and water (H₂O). The resulting chemical reaction is: C ₂ H ₅ OH + 3O ₂ → 2CO ₂ + 3H ₂ O The coefficient in front of H₂O indicates there are ____.