Question 1

The column of water extending in tubes from plant roots to leaves is maintained by

Accepted Answer

A) cohesion among water molecules. 
B) ionic bonds. 
C) covalent bonds. 
D) hydrophobic interactions. 
E) hydrophilic interactions. 
A) cohesion among water molecules. 
B) ionic bonds. 
C) covalent bonds. 
D) hydrophobic interactions. 
E) hydrophilic interactions. A

Question 2

The dots in the figure represent a(n)

Accepted Answer

A) covalent bond. 
B) ionic bond. 
C) hydrogen bond. 
D) polar covalent bond. 
E) hydrophobic interaction. 
A) covalent bond. 
B) ionic bond. 
C) hydrogen bond. 
D) polar covalent bond. 
E) hydrophobic interaction. C

Question 3

Whether one atom will bond with another depends on the element and the number and arrangement of its

Accepted Answer

A) protons. 
B) neutrons. 
C) electrons. 
D) neutrinos. 
E) pions. 
A) protons. 
B) neutrons. 
C) electrons. 
D) neutrinos. 
E) pions. C

Question 4

All atoms of an element have the same number of

Accepted Answer

A) ions. 
B) protons. 
C) neutrons. 
D) electrons. 
E) protons and neutrons. 
A) ions. 
B) protons. 
C) neutrons. 
D) electrons. 
E) protons and neutrons.

Question 5

Which components of an atom do not have a charge? I.electrons
II)protons
III)neutrons

Accepted Answer

A) I only 
B) II only 
C) III only 
D) I and II 
E) II and III 
A) I only 
B) II only 
C) III only 
D) I and II 
E) II and III

Question 6

Which of the following statements is false?

Accepted Answer

A) Ice is denser than liquid water. 
B) All living organisms require water. 
C) Water has cohesive properties. 
D) Water is a liquid at room temperature. 
E) All of the above are false. 
A) Ice is denser than liquid water. 
B) All living organisms require water. 
C) Water has cohesive properties. 
D) Water is a liquid at room temperature. 
E) All of the above are false.

Question 7

The oil globules that result when a water and oil mixture is shaken are due to a(n) __________ interaction.

Accepted Answer

A) acidic 
B) basic 
C) hydrophilic 
D) hydrophobic 
E) ionic 
A) acidic 
B) basic 
C) hydrophilic 
D) hydrophobic 
E) ionic

Question 8

Toxic elements such as mercury and arsenic are found in the human body because

Accepted Answer

A) of contamination from the environment. 
B) trace amounts of these elements have vital biological functions. 
C) they are needed to kill bacteria. 
D) they may be ingested with food but inactivated by cells. 
E) in small amounts they are biologically inactive and tolerated by cells. 
A) of contamination from the environment. 
B) trace amounts of these elements have vital biological functions. 
C) they are needed to kill bacteria. 
D) they may be ingested with food but inactivated by cells. 
E) in small amounts they are biologically inactive and tolerated by cells.

Question 9

Oxygen, with an atomic number of 8, has __________ electrons in the first energy level and __________ electrons in the second energy level.

Accepted Answer

A) 1; 7 
B) 2; 6 
C) 3; 5 
D) 4; 4 
E) 5; 3 
A) 1; 7 
B) 2; 6 
C) 3; 5 
D) 4; 4 
E) 5; 3

Question 10

Which of the following is NOT true?

Accepted Answer

A) Acids donate hydrogen ions. 
B) In a neutral solution, the amounts of hydrogen and hydroxyl ions are equal. 
C) Salts have no function in cells. 
D) Bases accept hydrogen ions.. 
E) .7.0 represents a neutral pH. 
A) Acids donate hydrogen ions. 
B) In a neutral solution, the amounts of hydrogen and hydroxyl ions are equal. 
C) Salts have no function in cells. 
D) Bases accept hydrogen ions.. 
E) .7.0 represents a neutral pH.

Question 11

Which of the following is false concerning the atom in the figure?

Accepted Answer

A) The number of protons and the number of electrons are equal. 
B) It has an atomic mass of 4. 
C) Electrons are moving around the nucleus. 
D) It has an atomic number of 2. 
E) The number of electrons exceeds the number of protons. 
A) The number of protons and the number of electrons are equal. 
B) It has an atomic mass of 4. 
C) Electrons are moving around the nucleus. 
D) It has an atomic number of 2. 
E) The number of electrons exceeds the number of protons.

Question 12

"Acidic" is an appropriate description for all EXCEPT which one of the following?

Accepted Answer

A) excess hydrogen ions 
B) the contents of the stomach 
C) magnesium hydroxide 
D) HCl 
E) a pH less than 7 
A) excess hydrogen ions 
B) the contents of the stomach 
C) magnesium hydroxide 
D) HCl 
E) a pH less than 7

Question 13

In __________ bonds, both atoms exert the same pull on shared electrons.

Accepted Answer

A) nonpolar covalent 
B) polar covalent 
C) double covalent 
D) triple covalent 
E) coordinate covalent 
A) nonpolar covalent 
B) polar covalent 
C) double covalent 
D) triple covalent 
E) coordinate covalent

Question 14

Most of the body's internal environment is at a pH between

Accepted Answer

A) 6.8 and 7.2 
B) 7.0 and 7.2 
C) 6.5 and 7.5 
D) 7.3 and 7.5 
E) 7.5 and 8.0 
A) 6.8 and 7.2 
B) 7.0 and 7.2 
C) 6.5 and 7.5 
D) 7.3 and 7.5 
E) 7.5 and 8.0

Question 15

In the chemical shorthand 14C, the 14 represents the number of

Accepted Answer

A) excess neutrons. 
B) protons plus neutrons. 
C) electrons. 
D) protons plus electrons. 
E) radioactive particles. 
A) excess neutrons. 
B) protons plus neutrons. 
C) electrons. 
D) protons plus electrons. 
E) radioactive particles.

Question 16

Magnesium has 12 protons.How many electrons are in its second energy level?

Accepted Answer

A) 2 
B) 4 
C) 6 
D) 8 
E) 10 
A) 2 
B) 4 
C) 6 
D) 8 
E) 10

Question 17

Electrons are shared in bonds that are

Accepted Answer

A) covalent. 
B) polar. 
C) nonpolar. 
D) covalent, polar, or nonpolar. 
E) covalent, but not polar or nonpolar. 
A) covalent. 
B) polar. 
C) nonpolar. 
D) covalent, polar, or nonpolar. 
E) covalent, but not polar or nonpolar.

Question 18

Radioactive isotopes have

Accepted Answer

A) excess electrons. 
B) excess protons. 
C) excess neutrons. 
D) insufficient neutrons. 
E) insufficient protons. 
A) excess electrons. 
B) excess protons. 
C) excess neutrons. 
D) insufficient neutrons. 
E) insufficient protons.

Question 19

Which statement concerning radioisotope 14C is false?

Accepted Answer

A) It can be substituted for 12C in glucose and the body will still be able to use the compound. 
B) It has a different number of protons than 12C. 
C) It has more neutrons than 12C. 
D) It behaves the same chemically as 12C. 
E) It has six carbons and eight neutrons. 
A) It can be substituted for 12C in glucose and the body will still be able to use the compound. 
B) It has a different number of protons than 12C. 
C) It has more neutrons than 12C. 
D) It behaves the same chemically as 12C. 
E) It has six carbons and eight neutrons.

Question 20

A solution with a pH of 8 has how many times fewer hydrogen ions than a solution with a pH of 6?

Accepted Answer

A) 2 
B) 4 
C) 10 
D) 100 
E) 1,000 
A) 2 
B) 4 
C) 10 
D) 100 
E) 1,000

Exam 2: Lifes Chemical Basis

The column of water extending in tubes from plant roots to leaves is maintained by

The dots in the figure represent a(n)

Whether one atom will bond with another depends on the element and the number and arrangement of its

All atoms of an element have the same number of

Which components of an atom do not have a charge? I.electrons II)protons III)neutrons

Which of the following statements is false?

The oil globules that result when a water and oil mixture is shaken are due to a(n) __________ interaction.

Toxic elements such as mercury and arsenic are found in the human body because

Oxygen, with an atomic number of 8, has __________ electrons in the first energy level and __________ electrons in the second energy level.

Which of the following is NOT true?

Which of the following is false concerning the atom in the figure?

"Acidic" is an appropriate description for all EXCEPT which one of the following?

In __________ bonds, both atoms exert the same pull on shared electrons.

Most of the body's internal environment is at a pH between

In the chemical shorthand 14C, the 14 represents the number of

Magnesium has 12 protons.How many electrons are in its second energy level?

Electrons are shared in bonds that are

Radioactive isotopes have

Which statement concerning radioisotope 14C is false?

A solution with a pH of 8 has how many times fewer hydrogen ions than a solution with a pH of 6?

Invitation to Biology

Molecules of Life

Cell Structure and Function

A Closer Look at Cell Membranes

Ground Rules of Metabolism

Where It Startsphotosynthesis

Energy-Releasing Pathways

How Cells Reproduce

Meiosis and Sexual Reproduction

Observing Patterns in Inherited Traits

Chromosomes and Human Inheritance

Dna Structure and Function

From Dna to Protein

Controls Over Genes

Recombinant Dna and Genetic Engineering

The Macroevolutionary Puzzle

Emergence of Evolutionary Thought

Organizing Information About Species

The Origin and Evolution of Life

Viruses and Prokaryotes

Protists the Simplest Eukaryotes

Plants

Fungi

Animals: the Invertebrates

Animal Evolution the Chordates

Human Evolution: a Case Study

Plant Tissues

Plant Nutrition and Transport

Plant Reproduction

Plant Growth and Development

Animal Tissues and Organ Systems

Neural Control

Sensory Perception

Endocrine Control

Protection, Support, and Movement

Circulation

Immunity

Respiration

Digestion and Human Nutrition

Maintaining the Internal Environment

Animal Reproductive Systems

Animal Development

Animal Behavior

Population Ecology

Community Structure and Biodiversity

Ecosystems

The Biosphere

Human Impacts on the Biosphere

Filters

Oxygen, with an atomic number of 8, has electrons in the first energy level and electrons in the second energy level.

In the chemical shorthand ¹⁴C, the 14 represents the number of

Which statement concerning radioisotope ¹⁴C is false?