Question 1

If an enzyme's was denatured,it would no longer bind efficiently with its substrate efficiently.

Accepted Answer

A) True 
 B)False

Question 2

Figure:  
-What does "E" represent in the diagram of the plasma membrane?

Accepted Answer

A) peripheral protein 
B) phospholipids bilayer 
C) cytoskeleton 
D) hydrophilic heads 
E) glycolipid 
A) peripheral protein 
B) phospholipids bilayer 
C) cytoskeleton 
D) hydrophilic heads 
E) glycolipid

Question 3

The breakdown or hydrolysis of ATP creates

Accepted Answer

A) Lactate and a phosphate 
B) ADP and a phosphate 
C) ADP and energy 
D) Pyruvate and energy 
E) ADP,a phosphate,and energy 
A) Lactate and a phosphate 
B) ADP and a phosphate 
C) ADP and energy 
D) Pyruvate and energy 
E) ADP,a phosphate,and energy

Question 4

How can enzymes speed up chemical reactions?

Accepted Answer

A) They lower the activation energy needed for the reaction. 
B) They increase the pH of the reaction. 
C) They lower the temperature of the reaction. 
D) They lower the rate of ATP breakdown in the reaction. 
E) They increase the amount of substrate in the reaction. 
A) They lower the activation energy needed for the reaction. 
B) They increase the pH of the reaction. 
C) They lower the temperature of the reaction. 
D) They lower the rate of ATP breakdown in the reaction. 
E) They increase the amount of substrate in the reaction.

Question 5

The hydrolysis reaction of ATP is called a ____ reaction,because the process _________.

Accepted Answer

A) kinetic,keeps molecules moving 
B) endergonic,must be supplied with energy 
C) coupled,involves two molecules 
D) output,releases products 
E) exergonic,gives off energy 
A) kinetic,keeps molecules moving 
B) endergonic,must be supplied with energy 
C) coupled,involves two molecules 
D) output,releases products 
E) exergonic,gives off energy

Question 6

A cell lacking ATP would be able to run all endergonic reactions.

Accepted Answer

A) True 
 B)False

Question 7

Which of the following terms best describes stored energy?

Accepted Answer

A) kinetic energy 
B) potential energy 
C) transformation energy 
D) mechanical energy 
E) heat energy 
A) kinetic energy 
B) potential energy 
C) transformation energy 
D) mechanical energy 
E) heat energy

Question 8

Osmosis requires

Accepted Answer

A) active transport of water molecules. 
B) an equal concentration of solvent on both sides of the membrane. 
C) no turgor pressure. 
D) a differentially permeable membrane. 
E) no osmotic pressurE. 
A) active transport of water molecules. 
B) an equal concentration of solvent on both sides of the membrane. 
C) no turgor pressure. 
D) a differentially permeable membrane. 
E) no osmotic pressurE.

Question 9

Which of the following states the First Law of Thermodynamics?

Accepted Answer

A) One usable form of energy can be completely converted into a more useable form. 
B) One usable form of energy can be completely converted into another useable form. 
C) Energy can be created and destroyed. 
D) Energy cannot be created or destroyeD. 
E) Energy cannot be transformed. 
A) One usable form of energy can be completely converted into a more useable form. 
B) One usable form of energy can be completely converted into another useable form. 
C) Energy can be created and destroyed. 
D) Energy cannot be created or destroyeD. 
E) Energy cannot be transformed.

Question 10

Which of the following statements about participants in a reaction would have to be about a component other than an enzyme?

Accepted Answer

A) They speed up chemical reactions. 
B) They are not reusable. 
C) They are proteins. 
D) They are reusable. 
E) They are considered organic catalysts. 
A) They speed up chemical reactions. 
B) They are not reusable. 
C) They are proteins. 
D) They are reusable. 
E) They are considered organic catalysts.

Question 11

During the process to move an organelle inside a cell,the motor protein dynein must bind the organelle and use energy to walk along a microtubule tract.How is the energy to the dynein supplied?

Accepted Answer

A) from the endergonic reaction of ATP breakdown 
B) from the stable reaction of ATP breakdown 
C) from the exergonic reaction of ATP breakdown 
D) from the exergonic reaction of ATP formation 
E) from the entropic reaction of ATP breakdown 
A) from the endergonic reaction of ATP breakdown 
B) from the stable reaction of ATP breakdown 
C) from the exergonic reaction of ATP breakdown 
D) from the exergonic reaction of ATP formation 
E) from the entropic reaction of ATP breakdown

Question 12

What structure joins the cells in heart tissue together,so that the cells work in a coordinated fashion?

Accepted Answer

A) tight junctions 
B) gap junctions 
C) extracellular matrix 
D) anchoring junctions 
E) microvilli 
A) tight junctions 
B) gap junctions 
C) extracellular matrix 
D) anchoring junctions 
E) microvilli

Question 13

What are the membrane-lined channels that allow direct exchange of materials between two adjacent plant cells?

Accepted Answer

A) extracellular matrix 
B) plasmodesmata 
C) intermediate filament 
D) tight junctions 
E) anchoring desmosome 
A) extracellular matrix 
B) plasmodesmata 
C) intermediate filament 
D) tight junctions 
E) anchoring desmosome

Question 14

Which of the following would be least likely to have a direct effect on the speed at which a given enzyme works?

Accepted Answer

A) oxygen concentration 
B) temperature 
C) pH 
D) substrate concentration 
E) cofactors and vitamins 
A) oxygen concentration 
B) temperature 
C) pH 
D) substrate concentration 
E) cofactors and vitamins

Question 15

Chemical reactions that only occur if there is an input of energy are referred to as

Accepted Answer

A) exergonic reactions. 
B) endergonic reactions. 
C) kinetic reactions. 
D) coupled reactions. 
E) input reactions. 
A) exergonic reactions. 
B) endergonic reactions. 
C) kinetic reactions. 
D) coupled reactions. 
E) input reactions.

Question 16

Figure:  
-What does "C" represent in the diagram of the plasma membrane?

Accepted Answer

A) hydrophilic heads 
B) cytoskeleton 
C) glycolipid 
D) phospholipids bilayer 
E) peripheral protein 
A) hydrophilic heads 
B) cytoskeleton 
C) glycolipid 
D) phospholipids bilayer 
E) peripheral protein

Question 17

When an inhibitor blocks the active site of an enzyme,this is referred to as

Accepted Answer

A) activation inhibition 
B) substrate inhibition 
C) noncompetitive inhibition 
D) competitive inhibition 
E) cofactor inhibition 
A) activation inhibition 
B) substrate inhibition 
C) noncompetitive inhibition 
D) competitive inhibition 
E) cofactor inhibition

Question 18

Why is the cell wall important when a plant cell is placed into a hypotonic solution?

Accepted Answer

A) Cell wall prevents the cell from shrinking. 
B) Cell wall allows creanation to occur. 
C) Active transport occurs through the cell wall. 
D) Diffusion occurs through the cell wall. 
E) Cell wall prevents the cell from bursting. 
A) Cell wall prevents the cell from shrinking. 
B) Cell wall allows creanation to occur. 
C) Active transport occurs through the cell wall. 
D) Diffusion occurs through the cell wall. 
E) Cell wall prevents the cell from bursting.

Question 19

What happens if more substrates are added to a reaction which already has reached maximum rate?

Accepted Answer

A) It will strongly increase reaction rate. 
B) It will weakly decrease reaction rate. 
C) It will strongly decrease reaction rate. 
D) It will have no effect. 
E) It will weakly increase reaction ratE. 
A) It will strongly increase reaction rate. 
B) It will weakly decrease reaction rate. 
C) It will strongly decrease reaction rate. 
D) It will have no effect. 
E) It will weakly increase reaction ratE.

Question 20

An isotonic solution means that the solute concentration outside the cell

Accepted Answer

A) is much greater than inside the cell. 
B) is much less than inside the cell., 
C) is slightly less than inside the cell 
D) is same as inside the cell.. 
E) is same as inside the cell. 
A) is much greater than inside the cell. 
B) is much less than inside the cell., 
C) is slightly less than inside the cell 
D) is same as inside the cell.. 
E) is same as inside the cell.

Exam 5: Dynamic Activities of Cells

If an enzyme's was denatured,it would no longer bind efficiently with its substrate efficiently.

Figure: -What does "E" represent in the diagram of the plasma membrane?

The breakdown or hydrolysis of ATP creates

How can enzymes speed up chemical reactions?

The hydrolysis reaction of ATP is called a ____ reaction,because the process _________.

A cell lacking ATP would be able to run all endergonic reactions.

Which of the following terms best describes stored energy?

Osmosis requires

Which of the following states the First Law of Thermodynamics?

Which of the following statements about participants in a reaction would have to be about a component other than an enzyme?

During the process to move an organelle inside a cell,the motor protein dynein must bind the organelle and use energy to walk along a microtubule tract.How is the energy to the dynein supplied?

What structure joins the cells in heart tissue together,so that the cells work in a coordinated fashion?

What are the membrane-lined channels that allow direct exchange of materials between two adjacent plant cells?

Which of the following would be least likely to have a direct effect on the speed at which a given enzyme works?

Chemical reactions that only occur if there is an input of energy are referred to as

Figure: -What does "C" represent in the diagram of the plasma membrane?

When an inhibitor blocks the active site of an enzyme,this is referred to as

Why is the cell wall important when a plant cell is placed into a hypotonic solution?

What happens if more substrates are added to a reaction which already has reached maximum rate?

An isotonic solution means that the solute concentration outside the cell

Biology, the Study of Life

Basic Chemistry of Cells

Organic Molecules of Cells

Structure and Function of Cells

Pathways of Photosynthesis

Pathways of Cellular Respiration

Cellular Reproduction

Sexual Reproduction

Patterns of Genetic Inheritance

Molecular Biology of Inheritance

Regulation of Gene Activity

Biotechnology and Genomics

Evidence of Evolution

Speciation and Evolution

The Evolutionary History of Life on Earth

Evolution of Microbial Life

Evolution of Protists

Evolution of Plants and Fungi

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Evolution of Humans

Plant Organization and Homeostasis

Transport and Nutrition in Plants

Control of Growth Responses in Plants

Reproduction in Plants

Animal Organization and Homeostasis

Coordination by Neural Signaling

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Locomotion and Support Systems

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Lymph Transport and Immunity

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Gas Exchange and Transport in Animals

Osmoregulation and Excretion

Coordination by Hormone Signaling

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The hydrolysis reaction of ATP is called a reaction,because the process _____.