Question 1

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 2

Match the following correctly.
a.simple diffusion
b.exocytosis
c.osmosis
d.active transport
e.phagocytosis
-This process explains the movement of molecules against their concentration gradient.

Accepted Answer

The answer of Match the following correctly.
a.simple diffusion
b.exocytosis
c.osmosis
d.active transport
e.phagocytosis
-This process...

Question 3

Tonicity refers to

Accepted Answer

A)  the total concentration of solutes in fluids separated by a selectively permeable membrane. 
B)  the pressure exerted by the fluids surrounding a cell. 
C)  the amount of negative versus positive charges of the molecules and ions in a solution. 
D)  how able a cell is to resist changes in solute concentrations without bursting or shrinking. 
E)  the ease with which solutes can cross a particular cell membrane. 
A)  the total concentration of solutes in fluids separated by a selectively permeable membrane. 
B)  the pressure exerted by the fluids surrounding a cell. 
C)  the amount of negative versus positive charges of the molecules and ions in a solution. 
D)  how able a cell is to resist changes in solute concentrations without bursting or shrinking. 
E)  the ease with which solutes can cross a particular cell membrane.

Question 4

Answer the questions by matching each word or groups of words with the appropriate definition.
a.reactant
b.product
c.ATP
d.activation energy
e.reaction
f.phosphorylation
-the main energy carrier between reaction sites in cells

Accepted Answer

The answer of Answer the questions by matching each word...

Question 5

Which of the following statements is CORRECT about energy?

Accepted Answer

A)  Energy is the capacity to do work. 
B)  It can be created using nuclear reactors. 
C)  It can be created using a windmill. 
D)  It can be created using biofuels. 
E)  All of these are correct. 
A)  Energy is the capacity to do work. 
B)  It can be created using nuclear reactors. 
C)  It can be created using a windmill. 
D)  It can be created using biofuels. 
E)  All of these are correct.

Question 6

The following statements are all true about energy except one.Choose the exception.

Accepted Answer

A)  Energy is captured by heterotrophs. 
B)  Energy is not recycled. 
C)  Energy is the ability to do work. 
D)  Energy has a tendency to disperse. 
E)  Energy can be transferred from one form to another. 
A)  Energy is captured by heterotrophs. 
B)  Energy is not recycled. 
C)  Energy is the ability to do work. 
D)  Energy has a tendency to disperse. 
E)  Energy can be transferred from one form to another.

Question 7

Movement of substances that requires the expenditure of ATP molecules is

Accepted Answer

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

Question 8

The second law of thermodynamics implies that

Accepted Answer

A)  energy can be transformed into matter, and because of this, we can get something for nothing. 
B)  energy can be destroyed during nuclear reactions. 
C)  if energy is gained by one region of the universe, another place in the universe must also gain energy in order to maintain the balance of nature. 
D)  energy that is available to do work in the universe is decreasing. 
E)  energy can be created out of nothing. 
A)  energy can be transformed into matter, and because of this, we can get something for nothing. 
B)  energy can be destroyed during nuclear reactions. 
C)  if energy is gained by one region of the universe, another place in the universe must also gain energy in order to maintain the balance of nature. 
D)  energy that is available to do work in the universe is decreasing. 
E)  energy can be created out of nothing.

Question 9

Oxygen,carbon dioxide,as well as other small molecules,cross the plasma membrane through the process(es)of

Accepted Answer

A)  diffusion. 
B)  osmosis. 
C)  endocytosis and exocytosis. 
D)  active transport. 
E)  facilitated diffusion. 
A)  diffusion. 
B)  osmosis. 
C)  endocytosis and exocytosis. 
D)  active transport. 
E)  facilitated diffusion.

Question 10

Enzymes speed up reactions by

Accepted Answer

A)  lowering activation energy. 
B)  adding some energy to the system. 
C)  increasing activation energy. 
D)  lowering activation energy and adding some energy to the system. 
E)  doing all of these. 
A)  lowering activation energy. 
B)  adding some energy to the system. 
C)  increasing activation energy. 
D)  lowering activation energy and adding some energy to the system. 
E)  doing all of these.

Question 11

Which is true about guncotton?

Accepted Answer

A)  it is a highly explosive derivative of cholesterol. 
B)  it is used to make gunpowder. 
C)  it is less stable than gunpowder 
D)  it has a higher activation energy for a reaction with oxygen than gunpowder 
E)  more than one of these is correct. 
A)  it is a highly explosive derivative of cholesterol. 
B)  it is used to make gunpowder. 
C)  it is less stable than gunpowder 
D)  it has a higher activation energy for a reaction with oxygen than gunpowder 
E)  more than one of these is correct.

Question 12

Energy

Accepted Answer

A)  cannot be created. 
B)  cannot be destroyed. 
C)  cannot be created or destroyed. 
D)  can be created, but it cannot be destroyed. 
E)  can be created, and it can be destroyed. 
A)  cannot be created. 
B)  cannot be destroyed. 
C)  cannot be created or destroyed. 
D)  can be created, but it cannot be destroyed. 
E)  can be created, and it can be destroyed.

Question 13

Passive molecular diffusion occurs when

Accepted Answer

A)  the energy of ATP is added. 
B)  random collisions between molecules occurs. 
C)  there are variations in molecular sizes. 
D)  enzymes catalyze their movement. 
E)  none of these things occur. 
A)  the energy of ATP is added. 
B)  random collisions between molecules occurs. 
C)  there are variations in molecular sizes. 
D)  enzymes catalyze their movement. 
E)  none of these things occur.

Question 14

In passive transport,the movement of a small,nonpolar molecule across a cell membrane depends on

Accepted Answer

A)  adequate amounts of ATP. 
B)  a concentration gradient. 
C)  adequate ATP and a concentration gradient 
D)  the proper transport protein. 
E)  gated channels. 
A)  adequate amounts of ATP. 
B)  a concentration gradient. 
C)  adequate ATP and a concentration gradient 
D)  the proper transport protein. 
E)  gated channels.

Question 15

The rate of diffusion across a selectively permeable membrane will be slow when which of the following is (are)true?

Accepted Answer

A)  I only 
B)  II only 
C)  I and III 
D)  II and III 
E)  I, II, and III 
A)  I only 
B)  II only 
C)  I and III 
D)  II and III 
E)  I, II, and III

Question 16

In order to survive,heterotrophs must

Accepted Answer

A)  harvest the heat energy that is lost in energy conversions. 
B)  recycle energy from our metabolic reactions. 
C)  constantly take in energy rich foods. 
D)  harvest energy from sunlight. 
E)  convert low energy molecules into high energy molecules. 
A)  harvest the heat energy that is lost in energy conversions. 
B)  recycle energy from our metabolic reactions. 
C)  constantly take in energy rich foods. 
D)  harvest energy from sunlight. 
E)  convert low energy molecules into high energy molecules.

Question 17

To engulf a bacterium,a white blood cell would use

Accepted Answer

A)  facilitated diffusion 
B)  osmosis 
C)  phagocytosis 
D)  exocytosis 
E)  sodium-potassium pumps 
A)  facilitated diffusion 
B)  osmosis 
C)  phagocytosis 
D)  exocytosis 
E)  sodium-potassium pumps

Question 18

Which of the following statements is TRUE?

Accepted Answer

A)  The products of a reaction can have less energy than the reactants. 
B)  The products of a reaction can have more energy than the reactants. 
C)  Reversible reactions tend to approach equilibrium. 
D)  Many reactions are reversible. 
E)  All of these are true. 
A)  The products of a reaction can have less energy than the reactants. 
B)  The products of a reaction can have more energy than the reactants. 
C)  Reversible reactions tend to approach equilibrium. 
D)  Many reactions are reversible. 
E)  All of these are true.

Question 19

Which of the following is most toxic?

Accepted Answer

A)  alcohol dehydrogenase 
B)  ethanol 
C)  acetaldehyde 
D)  acetate 
E)  carbon dioxide 
A)  alcohol dehydrogenase 
B)  ethanol 
C)  acetaldehyde 
D)  acetate 
E)  carbon dioxide

Question 20

Unlike plants,fungi,and bacteria,animal cells cannot resist volume increases in hypotonic environments.This is because unlike those other organisms,animal cells

Accepted Answer

A)  do not have central vacuoles. 
B)  do not have cell walls. 
C)  do not have pumps that can actively pump out excess fluid. 
D)  are smaller than those other cells and thus cannot handle large increases in volume. 
E)  have relatively more solutes. 
A)  do not have central vacuoles. 
B)  do not have cell walls. 
C)  do not have pumps that can actively pump out excess fluid. 
D)  are smaller than those other cells and thus cannot handle large increases in volume. 
E)  have relatively more solutes.

Exam 4: Energy and Metabolism

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

Match the following correctly. a.simple diffusion b.exocytosis c.osmosis d.active transport e.phagocytosis -This process explains the movement of molecules against their concentration gradient.

Tonicity refers to

Answer the questions by matching each word or groups of words with the appropriate definition. a.reactant b.product c.ATP d.activation energy e.reaction f.phosphorylation -the main energy carrier between reaction sites in cells

Which of the following statements is CORRECT about energy?

The following statements are all true about energy except one.Choose the exception.

Movement of substances that requires the expenditure of ATP molecules is

The second law of thermodynamics implies that

Oxygen,carbon dioxide,as well as other small molecules,cross the plasma membrane through the process(es)of

Enzymes speed up reactions by

Which is true about guncotton?

Energy

Passive molecular diffusion occurs when

In passive transport,the movement of a small,nonpolar molecule across a cell membrane depends on

The rate of diffusion across a selectively permeable membrane will be slow when which of the following is (are)true?

In order to survive,heterotrophs must

To engulf a bacterium,a white blood cell would use

Which of the following statements is TRUE?

Which of the following is most toxic?

Unlike plants,fungi,and bacteria,animal cells cannot resist volume increases in hypotonic environments.This is because unlike those other organisms,animal cells

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

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