Question 1

The amount of matter in an object is its

Accepted Answer

A) size. 
B) weight. 
C) density. 
D) volume. 
E) mass. 
A) size. 
B) weight. 
C) density. 
D) volume. 
E) mass.

Question 2

Solubility refers to the ability of one substance to ___________ in another.

Accepted Answer

A) react 
B) dissolve 
C) precipitate 
D) conduct 
E) None of these choices are correct. 
A) react 
B) dissolve 
C) precipitate 
D) conduct 
E) None of these choices are correct.

Question 3

Which of the following is a synthesis reaction?

Accepted Answer

A) Two amino acids are bonded together to form a dipeptide. 
B) Sodium chloride is dissolved in water. 
C) ATP is converted to ADP. 
D) Sucrose is chemically separated to form one molecule of glucose and one molecule of fructose. 
E) Several dipeptide chains are formed from digestion of a long polypeptide chain. 
A) Two amino acids are bonded together to form a dipeptide. 
B) Sodium chloride is dissolved in water. 
C) ATP is converted to ADP. 
D) Sucrose is chemically separated to form one molecule of glucose and one molecule of fructose. 
E) Several dipeptide chains are formed from digestion of a long polypeptide chain.

Question 4

-The sodium chloride molecule breaks apart in water.What does "E" represent (the process)?

Accepted Answer

A) chloride ion 
B) dissociation 
C) water molecule 
D) sodium ion 
E) salt crystal 
A) chloride ion 
B) dissociation 
C) water molecule 
D) sodium ion 
E) salt crystal

Question 5

Which of the following organic groups does lactose belong to?

Accepted Answer

A) protein 
B) nucleic acid 
C) carbohydrate 
D) lipid 
E) vitamin 
A) protein 
B) nucleic acid 
C) carbohydrate 
D) lipid 
E) vitamin

Question 6

Electrolytes are substances that

Accepted Answer

A) are NOT found in the human body in any appreciable amounts. 
B) form covalent bonds with water. 
C) cannot conduct electricity in solution. 
D) are NOT charged particles. 
E) conduct electricity when dissolved in water. 
A) are NOT found in the human body in any appreciable amounts. 
B) form covalent bonds with water. 
C) cannot conduct electricity in solution. 
D) are NOT charged particles. 
E) conduct electricity when dissolved in water.

Question 7

Cations and anions that dissociate in water are sometimes called

Accepted Answer

A) molecules 
B) nonelectrolytes and solutes. 
C) electrolytes,because they can conduct an electrical current. 
D) nonelectrolytes,because they do not conduct an electrical current. 
E) molecules and electrolytes. 
A) molecules 
B) nonelectrolytes and solutes. 
C) electrolytes,because they can conduct an electrical current. 
D) nonelectrolytes,because they do not conduct an electrical current. 
E) molecules and electrolytes.

Question 8

Phospholipids

Accepted Answer

A) are fat-soluble vitamins. 
B) are found in cell membranes. 
C) contain subunits called amino acids. 
D) are water-soluble. 
E) are a type of steroid. 
A) are fat-soluble vitamins. 
B) are found in cell membranes. 
C) contain subunits called amino acids. 
D) are water-soluble. 
E) are a type of steroid.

Question 9

DNA

Accepted Answer

A) contains the sugar deoxyribose. 
B) assembles amino acids to make proteins.. 
C) is one of several amino acids. 
D) must travel to ribosomes to function. 
E) is a single-stranded molecule. 
A) contains the sugar deoxyribose. 
B) assembles amino acids to make proteins.. 
C) is one of several amino acids. 
D) must travel to ribosomes to function. 
E) is a single-stranded molecule.

Question 10

Carbon dioxide is considered a(n)

Accepted Answer

A) compound. 
B) molecule. 
C) ion. 
D) element. 
E) molecule and a compound. 
A) compound. 
B) molecule. 
C) ion. 
D) element. 
E) molecule and a compound.

Question 11

-Phospholipids are important components of the plasma membrane.What does "A" represent on the diagram?

Accepted Answer

A) phosphorus 
B) oxygen 
C) nitrogen 
D) polar (hydrophilic)region 
E) nonpolar (hydrophobic)region 
A) phosphorus 
B) oxygen 
C) nitrogen 
D) polar (hydrophilic)region 
E) nonpolar (hydrophobic)region

Question 12

Which of the following would be classified as a lipid?

Accepted Answer

A) catalase-an enzyme 
B) alanine-an amino acid 
C) starch-a polysaccharide 
D) cholesterol-a steroid 
E) sucrose-a disaccharide 
A) catalase-an enzyme 
B) alanine-an amino acid 
C) starch-a polysaccharide 
D) cholesterol-a steroid 
E) sucrose-a disaccharide

Question 13

What particle is formed when an acid loses a proton (H+)?

Accepted Answer

A) conjugate base 
B) buffer 
C) conjugate acid 
D) salt 
A) conjugate base 
B) buffer 
C) conjugate acid 
D) salt

Question 14

Chemical energy

Accepted Answer

A) moves matter. 
B) results from the position or movement of objects. 
C) is a form of potential energy within chemical bonds. 
D) comes from the sun. 
E) is not important in physiological processes. 
A) moves matter. 
B) results from the position or movement of objects. 
C) is a form of potential energy within chemical bonds. 
D) comes from the sun. 
E) is not important in physiological processes.

Question 15

-The sodium chloride molecule breaks apart in water.What does "D" represent?

Accepted Answer

A) chloride ion 
B) dissociation 
C) water molecule 
D) sodium ion 
E) salt crystal 
A) chloride ion 
B) dissociation 
C) water molecule 
D) sodium ion 
E) salt crystal

Question 16

How does a buffer help a solution maintain pH?

Accepted Answer

A)  A buffer releases acid to maintain proper pH. 
B)  A buffer forms both cations and anions to counteract acids. 
C)  A buffer can act like a base if pH is acidic,and it can act like an acid if pH is basic. 
D)  A buffer release base to neutralize acid. 
A)  A buffer releases acid to maintain proper pH. 
B)  A buffer forms both cations and anions to counteract acids. 
C)  A buffer can act like a base if pH is acidic,and it can act like an acid if pH is basic. 
D)  A buffer release base to neutralize acid.

Question 17

Sodium chloride is considered a(n)

Accepted Answer

A) molecule. 
B) element. 
C) compound. 
D) molecule and a compound. 
E) ion. 
A) molecule. 
B) element. 
C) compound. 
D) molecule and a compound. 
E) ion.

Question 18

Polysaccharides

Accepted Answer

A) are the smallest carbohydrates. 
B) contain carbon,hydrogen,and phosphate atoms. 
C) are not found in plants. 
D) contain long chains of monosaccharides. 
E) are formed when sucrose and glucose combine. 
A) are the smallest carbohydrates. 
B) contain carbon,hydrogen,and phosphate atoms. 
C) are not found in plants. 
D) contain long chains of monosaccharides. 
E) are formed when sucrose and glucose combine.

Question 19

Chemical substances that dissolve in water or react with water to release ions are known as

Accepted Answer

A) buffers. 
B) electrolytes. 
C) bases. 
D) inorganic compounds. 
E) enzymes. 
A) buffers. 
B) electrolytes. 
C) bases. 
D) inorganic compounds. 
E) enzymes.

Question 20

Intermolecular forces

Accepted Answer

A) separate atoms and ions from one another. 
B) are electrostatic attractions between different molecules. 
C) are found within molecules. 
D) evenly distribute electrical charge among all atoms in a sample. 
E) form dissociated ions. 
A) separate atoms and ions from one another. 
B) are electrostatic attractions between different molecules. 
C) are found within molecules. 
D) evenly distribute electrical charge among all atoms in a sample. 
E) form dissociated ions.

Exam 2: The Chemical Basis of Life

The amount of matter in an object is its

Solubility refers to the ability of one substance to ___________ in another.

Which of the following is a synthesis reaction?

-The sodium chloride molecule breaks apart in water.What does "E" represent (the process)?

Which of the following organic groups does lactose belong to?

Electrolytes are substances that

Cations and anions that dissociate in water are sometimes called

Phospholipids

DNA

Carbon dioxide is considered a(n)

-Phospholipids are important components of the plasma membrane.What does "A" represent on the diagram?

Which of the following would be classified as a lipid?

What particle is formed when an acid loses a proton (H+)?

Chemical energy

-The sodium chloride molecule breaks apart in water.What does "D" represent?

How does a buffer help a solution maintain pH?

Sodium chloride is considered a(n)

Polysaccharides

Chemical substances that dissolve in water or react with water to release ions are known as

Intermolecular forces

The Human Organism

Cell Biology

Tissues

Integumentary System

Skeletal System: Bones and Bone Tissue

Skeletal System: Gross Anatomy

Joints and Movement

Muscular System: Histology and Physiology

Muscular System: Gross Anatomy

Functional Organization of Nervous Tissue

Spinal Cord and Spinal Nerves

Brain and Cranial Nerves

Integration of Nervous System Functions

The Special Senses

Autonomic Nervous System

Functional Organization of the Endocrine System

Endocrine Glands

Cardiovascular System: Blood

Cardiovascular System: the Heart

Cardiovascular System: Blood Vessels and Circulation

Lymphatic System and Immunity

Respiratory System

Digestive System

Nutrition,metabolism,and Temperature Regulation

Urinary System

Water,electrolyte,and Acid-Based Balance

Reproductive System

Development,growth,aging,and Genetics

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