Question 1

A chemical bond never occurs between components of a mixture.Discuss this.

Accepted Answer

Mixtures come in three forms solutions,c

Question 2

Which of the following does NOT describe enzymes?

Accepted Answer

A)  Enzymes work by raising the energy of activation. 
B)  Some enzymes are purely protein. 
C)  Some enzymes are protein plus a cofactor. 
D)  Each enzyme is chemically specific. 
A)  Enzymes work by raising the energy of activation. 
B)  Some enzymes are purely protein. 
C)  Some enzymes are protein plus a cofactor. 
D)  Each enzyme is chemically specific.

Question 3

Which statement about enzymes is FALSE?

Accepted Answer

A)  Most enzymes can catalyze millions of reactions per minute. 
B)  Enzymes may be damaged by high temperature. 
C)  Enzymes may use coenzymes derived from vitamins or cofactors from metallic elements. 
D)  Enzymes require contact with substrate in order to assume their active form. 
A)  Most enzymes can catalyze millions of reactions per minute. 
B)  Enzymes may be damaged by high temperature. 
C)  Enzymes may use coenzymes derived from vitamins or cofactors from metallic elements. 
D)  Enzymes require contact with substrate in order to assume their active form.

Question 4

Which of the following is NOT considered a factor in influencing a reaction rate?

Accepted Answer

A)  time 
B)  concentration of reactants 
C)  temperature 
D)  particle size 
A)  time 
B)  concentration of reactants 
C)  temperature 
D)  particle size

Question 5

Phospholipids make up most of the lipid part of the cell membrane.Since water exists on both the outside and inside of a cell,which of the following phospholipid arrangements makes the most sense?

Accepted Answer

A)  a single layer of phospholipids with the polar heads facing outside the cell 
B)  a single layer of phospholipids with the polar heads facing inside the cell 
C)  two back-to-back phospholipid layers with the polar heads facing out on both sides 
D)  two back-to-back phospholipid layers with the non-polar tails facing out on both sides 
A)  a single layer of phospholipids with the polar heads facing outside the cell 
B)  a single layer of phospholipids with the polar heads facing inside the cell 
C)  two back-to-back phospholipid layers with the polar heads facing out on both sides 
D)  two back-to-back phospholipid layers with the non-polar tails facing out on both sides

Question 6

Which of the following statements is FALSE?

Accepted Answer

A)  The pH of blood is slightly basic. 
B)  The more hydrogen ions in a solution, the more acidic the solution. 
C)  When acids and bases are mixed, they react with each other to form water and a salt. 
D)  When the hydrogen ion concentration decreases, the hydroxyl ion concentration also decreases. 
A)  The pH of blood is slightly basic. 
B)  The more hydrogen ions in a solution, the more acidic the solution. 
C)  When acids and bases are mixed, they react with each other to form water and a salt. 
D)  When the hydrogen ion concentration decreases, the hydroxyl ion concentration also decreases.

Question 7

Match the following chemical bonds to the correct description:
-A bond in which electrons are completely lost or gained by the atoms involved.

Accepted Answer

A) Nonpolar covalent bond 
B) Polar covalent bond 
C) Ionic bond 
D) Hydrogen bond 
A) Nonpolar covalent bond 
B) Polar covalent bond 
C) Ionic bond 
D) Hydrogen bond

Question 8

Match the following:
-Is a function of,and varies with,gravity.

Accepted Answer

A) Weight 
B) Mass 
C) Matter 
D) Energy 
A) Weight 
B) Mass 
C) Matter 
D) Energy

Question 9

Choose the answer that best describes fibrous proteins.

Accepted Answer

A)  rarely exhibit secondary structure 
B)  are usually called enzymes 
C)  are cellular catalysts 
D)  are very stable and insoluble in water 
A)  rarely exhibit secondary structure 
B)  are usually called enzymes 
C)  are cellular catalysts 
D)  are very stable and insoluble in water

Question 10

Mixtures are combinations of elements or compounds that are physically blended together but are not bound by chemical bonds.

Accepted Answer

A) True 
 B)False

Question 11

Carbohydrates and proteins are built up from their basic building blocks by the ________.

Accepted Answer

A)  addition of a carbon atom between each two units 
B)  removal of a water molecule between each two units 
C)  addition of a water molecule between each two units 
D)  removal of a carbon atom between each two units 
A)  addition of a carbon atom between each two units 
B)  removal of a water molecule between each two units 
C)  addition of a water molecule between each two units 
D)  removal of a carbon atom between each two units

Question 12

What type of chemical bond can form between an atom with 11 protons and an atom with 17 protons?

Accepted Answer

A)  polar covalent 
B)  ionic 
C)  non-polar covalent 
D)  hydrogen 
A)  polar covalent 
B)  ionic 
C)  non-polar covalent 
D)  hydrogen

Question 13

Starch is the stored carbohydrate in plants,while ________ is the stored carbohydrate in animals.

Accepted Answer

A)  glycogen 
B)  cellulose 
C)  triglyceride 
D)  glucose 
A)  glycogen 
B)  cellulose 
C)  triglyceride 
D)  glucose

Question 14

Figure 2.1
Using Figure 2.1, match the following:
-Functional protein.

Accepted Answer

A) C 
B) B 
C) E 
D) D 
E) A 
A) C 
B) B 
C) E 
D) D 
E) A

Question 15

ATP → ADP + Pi is an example of a(n)________ reaction.

Accepted Answer

A)  decomposition 
B)  exchange 
C)  synthesis 
D)  reversible 
A)  decomposition 
B)  exchange 
C)  synthesis 
D)  reversible

Question 16

Match the following:
-Can be measured only by its effects on matter.

Accepted Answer

A) Weight 
B) Mass 
C) Matter 
D) Energy 
A) Weight 
B) Mass 
C) Matter 
D) Energy

Question 17

Figure 2.1
Using Figure 2.1, match the following:
-Nucleotide.

Accepted Answer

A) C 
B) B 
C) E 
D) D 
E) A 
A) C 
B) B 
C) E 
D) D 
E) A

Question 18

All organic compounds contain carbon.

Accepted Answer

A) True 
 B)False

Question 19

Which property of water is demonstrated when we sweat?

Accepted Answer

A)  high heat of vaporization 
B)  polar solvent properties 
C)  high heat capacity 
D)  reactivity 
E)  cushioning 
A)  high heat of vaporization 
B)  polar solvent properties 
C)  high heat capacity 
D)  reactivity 
E)  cushioning

Question 20

Figure 2.2
Using Figure 2.2, match the following:
-Phosphate.

Accepted Answer

A) A 
B) D 
C) B 
D) E 
E) C 
A) A 
B) D 
C) B 
D) E 
E) C

Exam 2: Chemistry Comes Alive

A chemical bond never occurs between components of a mixture.Discuss this.

Which of the following does NOT describe enzymes?

Which statement about enzymes is FALSE?

Which of the following is NOT considered a factor in influencing a reaction rate?

Phospholipids make up most of the lipid part of the cell membrane.Since water exists on both the outside and inside of a cell,which of the following phospholipid arrangements makes the most sense?

Which of the following statements is FALSE?

Match the following chemical bonds to the correct description: -A bond in which electrons are completely lost or gained by the atoms involved.

Match the following: -Is a function of,and varies with,gravity.

Choose the answer that best describes fibrous proteins.

Mixtures are combinations of elements or compounds that are physically blended together but are not bound by chemical bonds.

Carbohydrates and proteins are built up from their basic building blocks by the ________.

What type of chemical bond can form between an atom with 11 protons and an atom with 17 protons?

Starch is the stored carbohydrate in plants,while ________ is the stored carbohydrate in animals.

Figure 2.1 Using Figure 2.1, match the following: -Functional protein.

ATP → ADP + Pi is an example of a(n)________ reaction.

Match the following: -Can be measured only by its effects on matter.

Figure 2.1 Using Figure 2.1, match the following: -Nucleotide.

All organic compounds contain carbon.

Which property of water is demonstrated when we sweat?

Figure 2.2 Using Figure 2.2, match the following: -Phosphate.

The Human Body: an Orientation

Cells: the Living Units

Tissue: the Living Fabric

The Integumentary System

Bones and Skeletal Tissue

The Skeleton

Joints

Muscles and Muscle Tissue

The Muscular System

Fundamentals of the Nervous System and Nervous Tissue

The Central Nervous System

The Peripheral Nervous System and Reflex Activity

The Autonomic Nervous System

The Special Senses

The Endocrine System

Blood

The Cardiovascular System: the Heart

The Cardiovascular System: Blood Vessels

The Lymphatic System and Lymphoid Organs and Tissues

The Immune System: Innate and Adaptive Body Defenses

The Respiratory System

The Digestive System

Nutrition,metabolism,and Body Temperature Regulation

The Urinary System

Fluid,electrolyte,and Acid-Base Balance

The Reproductive System

Pregnancy and Human Development

Heredity

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