Question 1

Atomic isotopes

Accepted Answer

A)  are electrically unbalanced. 
B)  behave the same chemically and physically but differ biologically from other isotopes. 
C)  are the same physically and biologically but differ from other isotopes chemically. 
D)  have varying numbers of neutrons. 
E)  are produced when substances are exposed to radiation. 
A)  are electrically unbalanced. 
B)  behave the same chemically and physically but differ biologically from other isotopes. 
C)  are the same physically and biologically but differ from other isotopes chemically. 
D)  have varying numbers of neutrons. 
E)  are produced when substances are exposed to radiation.

Question 2

If the layer of wax was removed from the surface of an apple while leaving the skin intact,

Accepted Answer

A)  the apple would turn green. 
B)  the apple would lose water and dehydrate. 
C)  the apple would grow larger without that restriction. 
D)  all of these would happen. 
E)  nothing would happen. 
A)  the apple would turn green. 
B)  the apple would lose water and dehydrate. 
C)  the apple would grow larger without that restriction. 
D)  all of these would happen. 
E)  nothing would happen.

Question 3

The human body requires about ____ of fat each day to stay healthy.

Accepted Answer

A)  1 teaspoon 
B)  4 teaspoons 
C)  1 tablespoon 
D)  4 tablespoons 
E)  1 cup 
A)  1 teaspoon 
B)  4 teaspoons 
C)  1 tablespoon 
D)  4 tablespoons 
E)  1 cup

Question 4

Classification.The following are types of chemical bonds.Answer the questions with reference to those chemical bonds.
-the bond that holds organic molecules together

Accepted Answer

A) hydrogen 
B) ionic 
C) covalent 
A) hydrogen 
B) ionic 
C) covalent

Question 5

Which of the following is NOT a monosaccharide?

Accepted Answer

A)  glucose 
B)  fructose 
C)  deoxyribose 
D)  starch 
E)  ribose 
A)  glucose 
B)  fructose 
C)  deoxyribose 
D)  starch 
E)  ribose

Question 6

An atom that carries a charge is called a(n)

Accepted Answer

A)  ion. 
B)  molecule. 
C)  compound. 
D)  element. 
E)  microelement. 
A)  ion. 
B)  molecule. 
C)  compound. 
D)  element. 
E)  microelement.

Question 7

Match the following letters to the number with which they best correspond.
-total number of protons and neutrons in the nucleus of an atom.

Accepted Answer

A) Mass number 
B) Atomic number 
C) Radioisotope 
D) Isotopes 
E) Ions 
A) Mass number 
B) Atomic number 
C) Radioisotope 
D) Isotopes 
E) Ions

Question 8

Water is an excellent solvent because

Accepted Answer

A)  it forms spheres of hydrogenation around charged substances pulling their individual molecules away from one another. 
B)  it forms hydrogen bonds with many substances. 
C)  it has a high-heat containing property. 
D)  of its polarity. 
E)  of all of these. 
A)  it forms spheres of hydrogenation around charged substances pulling their individual molecules away from one another. 
B)  it forms hydrogen bonds with many substances. 
C)  it has a high-heat containing property. 
D)  of its polarity. 
E)  of all of these.

Question 9

What type of bonding allows the long,straight chains of cellulose to lock together tightly?

Accepted Answer

A)  hydrogen 
B)  polar covalent 
C)  ionic 
D)  nonpolar covalent 
E)  mettalic 
A)  hydrogen 
B)  polar covalent 
C)  ionic 
D)  nonpolar covalent 
E)  mettalic

Question 10

Cellular pH is kept near a value of 7 by the action of

Accepted Answer

A)  salts. 
B)  buffers. 
C)  acids. 
D)  bases. 
E)  water. 
A)  salts. 
B)  buffers. 
C)  acids. 
D)  bases. 
E)  water.

Question 11

In a polymer of nucleotides,how does one nucleotide attach to another?

Accepted Answer

A)  the base of one nucleotide is attached to the base of the next 
B)  the base of one nucletide it attached to the sugar of the next 
C)  the sugar of one nucleotide is attached to the sugar of the next 
D)  the phosphate group of one nucleotide is attached to the base of the next 
E)  the phosphate group of one nucleotide is attached to the sugar of the next 
A)  the base of one nucleotide is attached to the base of the next 
B)  the base of one nucletide it attached to the sugar of the next 
C)  the sugar of one nucleotide is attached to the sugar of the next 
D)  the phosphate group of one nucleotide is attached to the base of the next 
E)  the phosphate group of one nucleotide is attached to the sugar of the next

Question 12

A water molecule is polar because

Accepted Answer

A)  the oxygen atom is a negative ion and the hydrogen atoms are positive ions. 
B)  both the oxygen and the hydrogens are negatively charged. 
C)  oxygen has a magnetic charge. 
D)  the electrons of the hydrogen atoms are pulled to the oxygen atom. 
E)  hydrogen has a stronger pull on the electrons than does oxygen. 
A)  the oxygen atom is a negative ion and the hydrogen atoms are positive ions. 
B)  both the oxygen and the hydrogens are negatively charged. 
C)  oxygen has a magnetic charge. 
D)  the electrons of the hydrogen atoms are pulled to the oxygen atom. 
E)  hydrogen has a stronger pull on the electrons than does oxygen.

Question 13

Match the following numbers with the number of electrons in the stated energy level.
-number of electrons in the first energy level

Accepted Answer

A) 1 
B) 2 
C) 3 
D) 5 
E) 8 
A) 1 
B) 2 
C) 3 
D) 5 
E) 8

Question 14

Phosphorus
Consider the element phosphorus,which has an atomic mass of 30,and answer the following question(s).
-Phosphorus has ____ electron vacancies.

Accepted Answer

A)  1 
B)  2 
C)  3 
D)  5 
E)  8 
A)  1 
B)  2 
C)  3 
D)  5 
E)  8

Question 15

Glucose and fructose

Accepted Answer

A)  can be ring forms. 
B)  are structurally different. 
C)  are monosaccharides. 
D)  have the same atoms in the same ratio. 
E)  all of these. 
A)  can be ring forms. 
B)  are structurally different. 
C)  are monosaccharides. 
D)  have the same atoms in the same ratio. 
E)  all of these.

Question 16

Which of the following carbohydrates form highly branched chains of glucose monomers?

Accepted Answer

A)  glycogen 
B)  cellulose 
C)  fructose 
D)  starch 
E)  sucrose 
A)  glycogen 
B)  cellulose 
C)  fructose 
D)  starch 
E)  sucrose

Question 17

The property of water that helps cool our skin when we sweat is

Accepted Answer

A)  cohesion. 
B)  evaporation. 
C)  temperature stabilization. 
D)  lattice packing. 
E)  solvent power. 
A)  cohesion. 
B)  evaporation. 
C)  temperature stabilization. 
D)  lattice packing. 
E)  solvent power.

Question 18

Which of the following bonds is weakest?

Accepted Answer

A)  ionic 
B)  single covalent 
C)  polar covalent 
D)  nonpolar covalent 
E)  hydrogen 
A)  ionic 
B)  single covalent 
C)  polar covalent 
D)  nonpolar covalent 
E)  hydrogen

Question 19

Match the following letters to the number with which they best correspond.
-atoms with more or less electrons than protons.

Accepted Answer

A) Mass number 
B) Atomic number 
C) Radioisotope 
D) Isotopes 
E) Ions 
A) Mass number 
B) Atomic number 
C) Radioisotope 
D) Isotopes 
E) Ions

Question 20

A substance that is dissolved by a liquid is called a

Accepted Answer

A)  compound. 
B)  mixture. 
C)  solvent. 
D)  solute. 
E)  solution. 
A)  compound. 
B)  mixture. 
C)  solvent. 
D)  solute. 
E)  solution.

Exam 2: Molecules of Life

Atomic isotopes

If the layer of wax was removed from the surface of an apple while leaving the skin intact,

The human body requires about ____ of fat each day to stay healthy.

Classification.The following are types of chemical bonds.Answer the questions with reference to those chemical bonds. -the bond that holds organic molecules together

Which of the following is NOT a monosaccharide?

An atom that carries a charge is called a(n)

Match the following letters to the number with which they best correspond. -total number of protons and neutrons in the nucleus of an atom.

Water is an excellent solvent because

What type of bonding allows the long,straight chains of cellulose to lock together tightly?

Cellular pH is kept near a value of 7 by the action of

In a polymer of nucleotides,how does one nucleotide attach to another?

A water molecule is polar because

Match the following numbers with the number of electrons in the stated energy level. -number of electrons in the first energy level

Phosphorus Consider the element phosphorus,which has an atomic mass of 30,and answer the following question(s). -Phosphorus has ____ electron vacancies.

Glucose and fructose

Which of the following carbohydrates form highly branched chains of glucose monomers?

The property of water that helps cool our skin when we sweat is

Which of the following bonds is weakest?

Match the following letters to the number with which they best correspond. -atoms with more or less electrons than protons.

A substance that is dissolved by a liquid is called a

Invitation to Biology

Cell Structure

Energy and Metabolism

Capturing and Releasing Energy

DNA Structure and Function

Gene Expression and Control

How Cells Reproduce

Patterns of Inheritance

Biotechnology

Evidence of Evolution

Processes of Evolution

Early Life Forms and the Viruses

Plants and Fungi

Animal Evolution

Population Ecology

Communities and Ecosystems

The Biosphere and Human Effects

Animal Tissues and Organs

How Animals Move

Circulation and Respiration

Immunity

Digestion and Excretion

Neural Control and the Senses

Endocrine Control

Reproduction and Development

Plant Form and Function

Plant Reproduction and Development

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