Question 1

When heat dissipates into the environment, it is no longer usable by the individual who produced it.

Accepted Answer

A) True 
 B)False

Question 2

Because the inside of a cell is more organized than the outside, the inside of the cell has increased entropy.

Accepted Answer

A) True 
 B)False

Question 3

If A has a free energy of 38 units, and C has a free energy of 45 units, and the reaction is exergonic, based on the calculation of free energy, which is the substrate and which is the product?

Accepted Answer

A)  A is the substrate and C is the product. 
B)  C is the substrate and A is the product. 
C)  It is impossible to tell with this information. 
D)  Both A and C are the products. 
E)  Both A and C are the substrates. 
A)  A is the substrate and C is the product. 
B)  C is the substrate and A is the product. 
C)  It is impossible to tell with this information. 
D)  Both A and C are the products. 
E)  Both A and C are the substrates.

Question 4

Glucose is broken down during cellular respiration so that the released energy can be stored and converted into ATP.

Accepted Answer

A) True 
 B)False

Question 5

A reaction is only considered an oxidation reaction when oxygen is involved.

Accepted Answer

A) True 
 B)False

Question 6

The addition of an enzyme will change the end result of a reaction. In other words, a particular reaction will result in a different product if an enzyme is used.

Accepted Answer

A) True 
 B)False

Question 7

During cellular respiration, what is reduced?

Accepted Answer

A)  glucose 
B)  oxygen 
C)  carbon dioxide 
D)  water 
E)  ATP (energy) 
A)  glucose 
B)  oxygen 
C)  carbon dioxide 
D)  water 
E)  ATP (energy)

Question 8

If A → B → C → D → E represents a metabolic pathway, then the letter E would be

Accepted Answer

A)  a substrate. 
B)  a product. 
C)  energy. 
D)  an enzyme. 
E)  an enzyme-substrate complex. 
A)  a substrate. 
B)  a product. 
C)  energy. 
D)  an enzyme. 
E)  an enzyme-substrate complex.

Question 9

Enzymes have "specificity." This means that they

Accepted Answer

A)  have a preferred pH. 
B)  have a preferred temperature. 
C)  have a particular substrate. 
D)  are only in certain cells. 
E)  require ATP and cofactors in order to work properly. 
A)  have a preferred pH. 
B)  have a preferred temperature. 
C)  have a particular substrate. 
D)  are only in certain cells. 
E)  require ATP and cofactors in order to work properly.

Question 10

If an enzymatic reaction was controlled by feedback inhibition, we would expect it to stop

Accepted Answer

A)  only if the substrate was exhausted. 
B)  when the cofactors are exhausted. 
C)  when the product changed the pH. 
D)  as soon as a critical level of end product builds up. 
E)  only if a metabolic poison is added. 
A)  only if the substrate was exhausted. 
B)  when the cofactors are exhausted. 
C)  when the product changed the pH. 
D)  as soon as a critical level of end product builds up. 
E)  only if a metabolic poison is added.

Question 11

Which of the following statements is true about enzymes?

Accepted Answer

A)  Their 3-D shape can vary and still be active. 
B)  Boiling temperatures do not affect their activity. 
C)  They catalyze only one specific type of reaction. 
D)  They can associate with a wide variety of substrates. 
E)  They are unaffected by changes in pH. 
A)  Their 3-D shape can vary and still be active. 
B)  Boiling temperatures do not affect their activity. 
C)  They catalyze only one specific type of reaction. 
D)  They can associate with a wide variety of substrates. 
E)  They are unaffected by changes in pH.

Question 12

A reactant will always produce the same type of product, regardless of the enzymes present.

Accepted Answer

A) True 
 B)False

Question 13

Which of the following is consistent with the laws of physics governing energy?

Accepted Answer

A)  Eventually, sunlight that is absorbed on the earth returns to the atmosphere as dispersed heat. 
B)  You eat a "quarter-pounder" hamburger and add exactly a quarter-pound of additional weight to your body. 
C)  When a liter of gasoline is burned in a car engine, 100% of its energy goes into moving the car along the road. 
D)  A calorie of sunlight becomes a calorie of plant tissue. 
E)  A calorie of plant tissue, which when eaten by you, becomes a calorie of muscle "power." 
A)  Eventually, sunlight that is absorbed on the earth returns to the atmosphere as dispersed heat. 
B)  You eat a "quarter-pounder" hamburger and add exactly a quarter-pound of additional weight to your body. 
C)  When a liter of gasoline is burned in a car engine, 100% of its energy goes into moving the car along the road. 
D)  A calorie of sunlight becomes a calorie of plant tissue. 
E)  A calorie of plant tissue, which when eaten by you, becomes a calorie of muscle "power."

Question 14

Which of the following is an example of chemical work within a cell?

Accepted Answer

A)  diffusion of oxygen across the membrane 
B)  building a protein 
C)  moving glucose across the cell membrane 
D)  the beating of cilia 
E)  the contraction of muscle fibers 
A)  diffusion of oxygen across the membrane 
B)  building a protein 
C)  moving glucose across the cell membrane 
D)  the beating of cilia 
E)  the contraction of muscle fibers

Exam 6: Metabolism: Energy and Enzymes

When heat dissipates into the environment, it is no longer usable by the individual who produced it.

Because the inside of a cell is more organized than the outside, the inside of the cell has increased entropy.

If A has a free energy of 38 units, and C has a free energy of 45 units, and the reaction is exergonic, based on the calculation of free energy, which is the substrate and which is the product?

Glucose is broken down during cellular respiration so that the released energy can be stored and converted into ATP.

A reaction is only considered an oxidation reaction when oxygen is involved.

The addition of an enzyme will change the end result of a reaction. In other words, a particular reaction will result in a different product if an enzyme is used.

During cellular respiration, what is reduced?

If A → B → C → D → E represents a metabolic pathway, then the letter E would be

Enzymes have "specificity." This means that they

If an enzymatic reaction was controlled by feedback inhibition, we would expect it to stop

Which of the following statements is true about enzymes?

A reactant will always produce the same type of product, regardless of the enzymes present.

Which of the following is consistent with the laws of physics governing energy?

Which of the following is an example of chemical work within a cell?

The Study of Life

The Molecules of Cells

Cell Structure and Function

Membrane Structure and Function

Cell Division

Cellular Respiration

Photosynthesis

Plant Organization and Function

Plant Reproduction and Responses

Human Organization

Cardiovascular System

Lymphatic and Immune Systems

Digestive System and Nutrition

Respiratory System

Urinary System and Excretion

Nervous System

Senses

Musculoskeletal System

Endocrine System

Reproductive System

Development and Aging

Patterns of Gene Inheritance

Chromosomal Basis of Inheritance

Dna Structure and Gene Expression

Biotechnology and Genomics

Evolution of Life

Microbiology

Protists and Fungi

Plants

Animals: the Invertebrates

Animals: Chordates and Vertebrates

Behavioral Ecology

Population and Community Ecology

Nature of Ecosystems

Major Ecosystems of the Biosphere

Conservation Biology

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