Question 1

Isotopes of the same element have

Accepted Answer

A)  the same number of neutrons but different numbers of protons. 
B)  different numbers of protons and electrons. 
C)  the same mass number. 
D)  the same atomic number but differ in their mass numbers. 
E)  no mass number. 
A)  the same number of neutrons but different numbers of protons. 
B)  different numbers of protons and electrons. 
C)  the same mass number. 
D)  the same atomic number but differ in their mass numbers. 
E)  no mass number.

Question 2

In an x-ray film of the skeletal system, the dense tissue areas appear ________ because they ________ the x-rays; the less dense tissues appear ________ because they ________ the x-rays.

Accepted Answer

A)  light; absorb; dark; do not absorb 
B)  dark; absorb; light; do not absorb 
C)  light; do not absorb; dark; absorb 
D)  dark; do not absorb; light; absorb 
A)  light; absorb; dark; do not absorb 
B)  dark; absorb; light; do not absorb 
C)  light; do not absorb; dark; absorb 
D)  dark; do not absorb; light; absorb

Question 3

Na (atomic no. 11) reacts with Cl (atomic no. 17) to become stable. In the reaction, Na will ________, while Cl will ________.

Accepted Answer

A)  accept one electron; give up one electron 
B)  give up one proton; accept one proton 
C)  share one electron with chlorine; share one electron with sodium 
D)  become an anion; become a cation 
E)  give up one electron; accept one electron 
A)  accept one electron; give up one electron 
B)  give up one proton; accept one proton 
C)  share one electron with chlorine; share one electron with sodium 
D)  become an anion; become a cation 
E)  give up one electron; accept one electron

Question 4

Which of the following means a change in shape of a protein?

Accepted Answer

A)  Amino acid 
B)  Peptide bond 
C)  Primary structure of protein 
D)  Secondary structure of protein 
E)  Denaturation 
A)  Amino acid 
B)  Peptide bond 
C)  Primary structure of protein 
D)  Secondary structure of protein 
E)  Denaturation

Question 5

-Water accounts for 50% of the weight of a young adult female and 60% of a young adult male. What kind of bond is found at "A"?

Accepted Answer

A)  Hydrogen bond 
B)  Water molecule 
C)  Oxygen atom 
D)  Hydrogen atom 
E)  Polar covalent bond 
A)  Hydrogen bond 
B)  Water molecule 
C)  Oxygen atom 
D)  Hydrogen atom 
E)  Polar covalent bond

Question 6

Inorganic chemists study substances ________ carbon, while organic chemists study substances ________ carbon.

Accepted Answer

A)  lacking; containing 
B)  containing; lacking 
C)  containing more than 1 mole of; with less than a mole of 
A)  lacking; containing 
B)  containing; lacking 
C)  containing more than 1 mole of; with less than a mole of

Question 7

Solution A has a pH of 10, and solution B has a pH of 2. Which of the following statements about these solutions is true?

Accepted Answer

A)  Solution A and solution B are both basic. 
B)  Solution B is basic. 
C)  Solution A is acidic. 
D)  Solution B has a higher H+ concentration than solution A. 
E)  Solution A has a higher H+ concentration than solution B. 
A)  Solution A and solution B are both basic. 
B)  Solution B is basic. 
C)  Solution A is acidic. 
D)  Solution B has a higher H+ concentration than solution A. 
E)  Solution A has a higher H+ concentration than solution B.

Question 8

Triglycerides are composed of

Accepted Answer

A)  monosaccharides. 
B)  amino acids. 
C)  nucleotides. 
D)  glycerol and fatty acids. 
E)  None of the choices are correct. 
A)  monosaccharides. 
B)  amino acids. 
C)  nucleotides. 
D)  glycerol and fatty acids. 
E)  None of the choices are correct.

Question 9

A cation is

Accepted Answer

A)  a combination of atoms held together by chemical bonds. 
B)  a positively charged ion. 
C)  a negatively charged ion. 
D)  a molecule that conducts electricity when placed in solution. 
E)  an alteration in the three-dimensional structure of a protein. 
A)  a combination of atoms held together by chemical bonds. 
B)  a positively charged ion. 
C)  a negatively charged ion. 
D)  a molecule that conducts electricity when placed in solution. 
E)  an alteration in the three-dimensional structure of a protein.

Question 10

DNA

Accepted Answer

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

Question 11

The molecule used most frequently by cells as a fuel belongs to which of the following groups?

Accepted Answer

A)  Prostaglandins 
B)  Carbohydrates 
C)  Nucleic acids 
D)  Steroids 
E)  Phospholipids 
A)  Prostaglandins 
B)  Carbohydrates 
C)  Nucleic acids 
D)  Steroids 
E)  Phospholipids

Question 12

-Water accounts for 50% of the weight of a young adult female and 60% of a young adult male. What kind of bond is found at "B"?

Accepted Answer

A)  Hydrogen bond 
B)  Water molecule 
C)  Oxygen atom 
D)  Hydrogen atom 
E)  Polar covalent bond 
A)  Hydrogen bond 
B)  Water molecule 
C)  Oxygen atom 
D)  Hydrogen atom 
E)  Polar covalent bond

Question 13

Proteins

Accepted Answer

A)  are the body's source of immediate energy. 
B)  are the building blocks of nucleotides. 
C)  provide much of the structure of body cells and tissues. 
D)  contain the genetic information of the cell. 
E)  insulate and cushion the body. 
A)  are the body's source of immediate energy. 
B)  are the building blocks of nucleotides. 
C)  provide much of the structure of body cells and tissues. 
D)  contain the genetic information of the cell. 
E)  insulate and cushion the body.

Question 14

Arrange the following from largest to smallest:
(1) Nucleus
(2) DNA molecule
(3) Skin cell
(4) Chicken eggs

Accepted Answer

A)  1, 2, 3, 4 
B)  4, 3, 1, 2 
C)  3, 4, 2, 1 
D)  2, 3, 1, 4 
E)  4, 2, 3, 1 
A)  1, 2, 3, 4 
B)  4, 3, 1, 2 
C)  3, 4, 2, 1 
D)  2, 3, 1, 4 
E)  4, 2, 3, 1

Question 15

In order to get energy (ATP) from food molecules in the final stage of respiration, humans require ________.

Accepted Answer

A)  oxygen 
B)  sodium 
C)  carbon dioxide 
D)  ribose 
A)  oxygen 
B)  sodium 
C)  carbon dioxide 
D)  ribose

Question 16

All of the following terms relate to lipids. Which does not belong with the other four?

Accepted Answer

A)  Cholesterol 
B)  Estrogen 
C)  Steroid 
D)  Triglyceride 
E)  Bile salts 
A)  Cholesterol 
B)  Estrogen 
C)  Steroid 
D)  Triglyceride 
E)  Bile salts

Question 17

Which of the following is a component of a nucleotide?

Accepted Answer

A)  Adenine - a nitrogen base 
B)  Glucose - a monosaccharide 
C)  Cholesterol - a steroid 
D)  Calcium ions 
E)  ATP 
A)  Adenine - a nitrogen base 
B)  Glucose - a monosaccharide 
C)  Cholesterol - a steroid 
D)  Calcium ions 
E)  ATP

Question 18

The mass of a chemical equal to its molecular weight in grams, containing 6.023 x 1023 molecules is a/an ________.

Accepted Answer

A)  mole 
B)  molarity 
C)  ion 
D)  atomic mass unit 
A)  mole 
B)  molarity 
C)  ion 
D)  atomic mass unit

Question 19

Normal pH range for blood is 7.35 to 7.45. If blood pH falls below 7.35,

Accepted Answer

A)  an imbalance called alkalosis results. 
B)  nothing happens as this is an acceptable deviation. 
C)  an imbalance called acidosis results. 
D)  the blood becomes saltier. 
E)  the number of red blood cells decreases. 
A)  an imbalance called alkalosis results. 
B)  nothing happens as this is an acceptable deviation. 
C)  an imbalance called acidosis results. 
D)  the blood becomes saltier. 
E)  the number of red blood cells decreases.

Question 20

Electrolytes are substances that

Accepted Answer

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

Exam 2: The Chemical Basis of Life

Isotopes of the same element have

In an x-ray film of the skeletal system, the dense tissue areas appear ________ because they ________ the x-rays; the less dense tissues appear ________ because they ________ the x-rays.

Na (atomic no. 11) reacts with Cl (atomic no. 17) to become stable. In the reaction, Na will ________, while Cl will ________.

Which of the following means a change in shape of a protein?

-Water accounts for 50% of the weight of a young adult female and 60% of a young adult male. What kind of bond is found at "A"?

Inorganic chemists study substances ________ carbon, while organic chemists study substances ________ carbon.

Solution A has a pH of 10, and solution B has a pH of 2. Which of the following statements about these solutions is true?

Triglycerides are composed of

A cation is

DNA

The molecule used most frequently by cells as a fuel belongs to which of the following groups?

-Water accounts for 50% of the weight of a young adult female and 60% of a young adult male. What kind of bond is found at "B"?

Proteins

Arrange the following from largest to smallest: (1) Nucleus (2) DNA molecule (3) Skin cell (4) Chicken eggs

In order to get energy (ATP) from food molecules in the final stage of respiration, humans require ________.

All of the following terms relate to lipids. Which does not belong with the other four?

Which of the following is a component of a nucleotide?

The mass of a chemical equal to its molecular weight in grams, containing 6.023 x 1023 molecules is a/an ________.

Normal pH range for blood is 7.35 to 7.45. If blood pH falls below 7.35,

Electrolytes are substances that

The Human Organism

Cell Biology

Tissues

Integumentary System

Skeletal System: Bones and Bone Tissue

Skeletal System: Gross Anatomy

Joint 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-Base Balance

Reproductive System

Development, Growth, Aging, and Genetics

Filters

In an x-ray film of the skeletal system, the dense tissue areas appear because they the x-rays; the less dense tissues appear because they the x-rays.

Na (atomic no. 11) reacts with Cl (atomic no. 17) to become stable. In the reaction, Na will , while Cl will .

Inorganic chemists study substances carbon, while organic chemists study substances carbon.

The mass of a chemical equal to its molecular weight in grams, containing 6.023 x 10²³ molecules is a/an ________.