Question 1

Which of these statements is false concerning covalent bonds?

Accepted Answer

A) Atoms share electrons. 
B) Molecules may possess many covalent bonds. 
C) Water contains polar covalent bonds. 
D) Covalent bonds may be "double bonds." 
E) In polar covalent bonds, electrons are shared equally. 
A) Atoms share electrons. 
B) Molecules may possess many covalent bonds. 
C) Water contains polar covalent bonds. 
D) Covalent bonds may be "double bonds." 
E) In polar covalent bonds, electrons are shared equally.

Question 2

Which of the following is(are) true of water?

Accepted Answer

A) It forms spheres of hydration around charged substances and can form hydrogen bonds with many substances. 
B) It has a high heat-containing property. 
C) It has cohesive properties. 
D) It is a liquid at room temperature. 
E) It is all of the above. 
A) It forms spheres of hydration around charged substances and can form hydrogen bonds with many substances. 
B) It has a high heat-containing property. 
C) It has cohesive properties. 
D) It is a liquid at room temperature. 
E) It is all of the above.

Question 3

The collection of elements that make up the human body are worth approximately

Accepted Answer

A) 46 thousand dollars. 
B) 30 million dollars. 
C) 118 dollars. 
D) 5 thousand dollars. 
E) none of these. 
A) 46 thousand dollars. 
B) 30 million dollars. 
C) 118 dollars. 
D) 5 thousand dollars. 
E) none of these.

Question 4

A hydrogen bond is a(n)

Accepted Answer

A) sharing of a pair of electrons between a hydrogen and an oxygen nucleus. 
B) sharing of a pair of electrons between a hydrogen nucleus and either an oxygen or a nitrogen nucleus. 
C) attractive force between a hydrogen atom and either an oxygen or a nitrogen atom that are in other molecules or within the same molecule. 
D) covalent bond between two hydrogen atoms. 
E) covalent bond between a hydrogen atom and either an oxygen atom or a nitrogen atom. 
A) sharing of a pair of electrons between a hydrogen and an oxygen nucleus. 
B) sharing of a pair of electrons between a hydrogen nucleus and either an oxygen or a nitrogen nucleus. 
C) attractive force between a hydrogen atom and either an oxygen or a nitrogen atom that are in other molecules or within the same molecule. 
D) covalent bond between two hydrogen atoms. 
E) covalent bond between a hydrogen atom and either an oxygen atom or a nitrogen atom.

Question 5

Which of the following is true of water?

Accepted Answer

A) The oxygen end is slightly electropositive. 
B) Hydrogen bonds hold water molecules together. 
C) Water covers about one-half of the earth's surface. 
D) It participates in hydrophobic interactions with polar molecules. 
E) Its solvent properties are greatest with nonpolar molecules. 
A) The oxygen end is slightly electropositive. 
B) Hydrogen bonds hold water molecules together. 
C) Water covers about one-half of the earth's surface. 
D) It participates in hydrophobic interactions with polar molecules. 
E) Its solvent properties are greatest with nonpolar molecules.

Question 6

The subatomic particle(s) with a negative charge is(are)

Accepted Answer

A) the neutron. 
B) the proton. 
C) the electron. 
D) both the neutron and proton. 
E) both the proton and electron. 
A) the neutron. 
B) the proton. 
C) the electron. 
D) both the neutron and proton. 
E) both the proton and electron.

Question 7

The atomic number is the number of

Accepted Answer

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

Question 8

The subatomic particle(s) with a positive charge is(are)

Accepted Answer

A) the neutron. 
B) the proton. 
C)  the electron. 
D) both the neutron and proton. 
E) both the proton and electron. 
A) the neutron. 
B) the proton. 
C)  the electron. 
D) both the neutron and proton. 
E) both the proton and electron.

Question 9

Which of the following is NOT true of hydrogen bonds?

Accepted Answer

A) They are quite weak. 
B) The hydrogen is slightly positive. 
C) They are common in macromolecules. 
D) They are difficult to form and break. 
E) They always involve hydrogen. 
A) They are quite weak. 
B) The hydrogen is slightly positive. 
C) They are common in macromolecules. 
D) They are difficult to form and break. 
E) They always involve hydrogen.

Question 10

Which components of an atom have negative charges? 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 11

Which is NOT an element?

Accepted Answer

A) water 
B) oxygen 
C) carbon 
D) chlorine 
E) hydrogen 
A) water 
B) oxygen 
C) carbon 
D) chlorine 
E) hydrogen

Question 12

The atomic mass (mass number)of an atom is determined by the combined masses of its

Accepted Answer

A) neutrons and protons. 
B) neutrons and electrons. 
C) protons and electrons. 
D) protons, neutrons, and electrons. 
E) neutrons, nucleus, and electrons. 
A) neutrons and protons. 
B) neutrons and electrons. 
C) protons and electrons. 
D) protons, neutrons, and electrons. 
E) neutrons, nucleus, and electrons.

Question 13

The bond in table salt (NaCl) is

Accepted Answer

A) polar. 
B) ionic. 
C) covalent. 
D) double. 
E) nonpolar. 
A) polar. 
B) ionic. 
C) covalent. 
D) double. 
E) nonpolar.

Question 14

Magnesium has 12 protons.How many electrons are in its third 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 15

Water is an example of a(n)

Accepted Answer

A) atom. 
B) ion. 
C) compound. 
D) mixture. 
E) element. 
A) atom. 
B) ion. 
C) compound. 
D) mixture. 
E) element.

Question 16

Hydrophobic molecules are __________ water.

Accepted Answer

A) attracted to 
B) absorbed by 
C) repelled by 
D) dissolved by 
E) polarized by 
A) attracted to 
B) absorbed by 
C) repelled by 
D) dissolved by 
E) polarized by

Question 17

Which of the following statements is NOT true?

Accepted Answer

A) All isotopes of an element have the same number of electrons. 
B) All isotopes of an element have the same number of protons. 
C) All isotopes of an element have the same number of neutrons. 
D) We refer to isotopes by mass number. 
E) 12C and 13C are isotopes. 
A) All isotopes of an element have the same number of electrons. 
B) All isotopes of an element have the same number of protons. 
C) All isotopes of an element have the same number of neutrons. 
D) We refer to isotopes by mass number. 
E) 12C and 13C are isotopes.

Question 18

Hydrophobic interactions are exhibited with

Accepted Answer

A) ions. 
B) nonpolar molecules. 
C) hydration ions. 
D) polar molecules. 
E) none of these. 
A) ions. 
B) nonpolar molecules. 
C) hydration ions. 
D) polar molecules. 
E) none of these.

Question 19

The subatomic particle(s) with no charge is(are)

Accepted Answer

A) the neutron. 
B) the proton. 
C) the electron. 
D) both the neutron and proton. 
E) both the proton and electron. 
A) the neutron. 
B) the proton. 
C) the electron. 
D) both the neutron and proton. 
E) both the proton and electron.

Question 20

By analogy, the orbitals and atomic nucleus may be said to most resemble

Accepted Answer

A) a merry-go-round. 
B) a sundial. 
C) a multilevel apartment building. 
D) a nest of mixing bowls. 
E) ripples in a pond. 
A) a merry-go-round. 
B) a sundial. 
C) a multilevel apartment building. 
D) a nest of mixing bowls. 
E) ripples in a pond.

Exam 2: Lifes Chemical Basis

Which of these statements is false concerning covalent bonds?

Which of the following is(are) true of water?

The collection of elements that make up the human body are worth approximately

A hydrogen bond is a(n)

Which of the following is true of water?

The subatomic particle(s) with a negative charge is(are)

The atomic number is the number of

The subatomic particle(s) with a positive charge is(are)

Which of the following is NOT true of hydrogen bonds?

Which components of an atom have negative charges? I.electrons II)protons III)neutrons

Which is NOT an element?

The atomic mass (mass number)of an atom is determined by the combined masses of its

The bond in table salt (NaCl) is

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

Water is an example of a(n)

Hydrophobic molecules are __________ water.

Which of the following statements is NOT true?

Hydrophobic interactions are exhibited with

The subatomic particle(s) with no charge is(are)

By analogy, the orbitals and atomic nucleus may be said to most resemble

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