A) an atom that loses one or more electrons and acquires a net positive charge B) an atom that shares its valence electrons C) a molecule that has both positive and negative charges D) an atom that gains one or more electrons and acquires a net negative charge A) an atom that loses one or more electrons and acquires a net positive charge B) an atom that shares its valence electrons C) a molecule that has both positive and negative charges D) an atom that gains one or more electrons and acquires a net negative charge

Exam 2: Chemistry Comes Alive

When DNA is replicated, it is necessary for the two strands to "unzip" temporarily. Choose which bonding type is most appropriate for holding the strands together in this way.

(Multiple Choice)

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Question 61

Protons and electrons exist in every atom nucleus except hydrogen. Is this statement true or false and why?

(True/False)

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Question 62

Which of the following statements is FALSE?

(Multiple Choice)

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Question 63

What is a cation?

(Multiple Choice)

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Question 64

Mrs. Mulligan goes to her dentist and, after having a couple of cavities filled, her dentist strongly suggests that she reduce her intake of sodas and increase her intake of calcium phosphates in the foods she eats. Why?

(Essay)

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Question 65

What is the ratio of fatty acids to glycerol in triglycerides (neutral fats)?

(Multiple Choice)

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Question 66

The acidity of a solution reflects the concentration of free hydrogen ions in the solution.

(True/False)

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Question 67

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?

(Multiple Choice)

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Question 68

Tendons are strong, rope-like structures that connect skeletal muscle to bone. Which of the following proteins would provide strength to a tendon?

(Multiple Choice)

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Question 69

Omega-3 fatty acids appear to decrease the risk of heart disease.

(True/False)

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Question 70

Atom X has 17 protons. How many electrons are in its valence shell (outermost energy level)?

(Multiple Choice)

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Question 71

The sharing of electrons in covalent bonds makes them stronger than ionic and hydrogen bonds.

(True/False)

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Question 72

Describe the factors that affect chemical reaction rates.

(Essay)

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Question 73

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

(Multiple Choice)

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Question 74

Which of the following is chemically inert (unreactive)?

(Multiple Choice)

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Question 75

Which of the following does NOT describe uses for the ATP molecule?

(Multiple Choice)

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Question 76

The basic structural material of the body consists of__________ .

(Multiple Choice)

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Question 77

About 60% to 80% of the volume of most living cells consists of organic compounds.

(True/False)

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Question 78

The fact that no chemical bonding occurs between the components of a mixture is the chief difference between mixtures and compounds.

(True/False)

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Question 79

The pH of body fluids must remain fairly constant for the body to maintain homeostasis.

(True/False)

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Question 80

Showing 61 - 80 of 105

When DNA is replicated, it is necessary for the two strands to "unzip" temporarily. Choose which bonding type is most appropriate for holding the strands together in this way.

Protons and electrons exist in every atom nucleus except hydrogen. Is this statement true or false and why?

Which of the following statements is FALSE?

What is a cation?

Mrs. Mulligan goes to her dentist and, after having a couple of cavities filled, her dentist strongly suggests that she reduce her intake of sodas and increase her intake of calcium phosphates in the foods she eats. Why?

What is the ratio of fatty acids to glycerol in triglycerides (neutral fats)?

The acidity of a solution reflects the concentration of free hydrogen ions in the solution.

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?

Tendons are strong, rope-like structures that connect skeletal muscle to bone. Which of the following proteins would provide strength to a tendon?

Omega-3 fatty acids appear to decrease the risk of heart disease.

Atom X has 17 protons. How many electrons are in its valence shell (outermost energy level)?

The sharing of electrons in covalent bonds makes them stronger than ionic and hydrogen bonds.

Describe the factors that affect chemical reaction rates.

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

Which of the following is chemically inert (unreactive)?

Which of the following does NOT describe uses for the ATP molecule?

The basic structural material of the body consists of__________ .

About 60% to 80% of the volume of most living cells consists of organic compounds.

The fact that no chemical bonding occurs between the components of a mixture is the chief difference between mixtures and compounds.

The pH of body fluids must remain fairly constant for the body to maintain homeostasis.

The Human Body: an Orientation

Cells: the Living Units

Tissue: the Living Fabric

The Integumentary System

Bones and Skeletal Tissues

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

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