Question 1

Which of the following properties of water molecules has important implications to life?

Accepted Answer

A) High surface tension 
B) The ability to dissolve polar substances 
C) The ability of ice to float in water 
D) All of the above are true 
A) High surface tension 
B) The ability to dissolve polar substances 
C) The ability of ice to float in water 
D) All of the above are true D

Question 2

To a large extent, a protein's function is dependent upon its shape.What determines a protein's shape?

Accepted Answer

A) The location of the active site 
B) The sequence of amino acids 
C) The number of amino acids 
D) The number of peptide bonds 
A) The location of the active site 
B) The sequence of amino acids 
C) The number of amino acids 
D) The number of peptide bonds B

Question 3

Which number represents the atomic weight of oxygen?

Accepted Answer

A) 6 
B) 16 
C) 18 
D) Not enough information given 
A) 6 
B) 16 
C) 18 
D) Not enough information given B

Question 4

Penicillin is a competitive inhibitor produced by a fungus in order to kill invading bacteria.It does this by mimicking the substrate required by the bacterium to build and repair its cell wall.Describe how mimicking the substrate would result in the death of the bacterium.

Accepted Answer

As a competitive inhibitor, it must bind

Question 5

Enzymes are a type of ________.

Accepted Answer

A) carbohydrate 
B) protein 
C) lipid 
D) monomer 
A) carbohydrate 
B) protein 
C) lipid 
D) monomer

Question 6

The chemical name for table salt is sodium chloride, or simply NaCl.What type of chemical is NaCl?

Accepted Answer

A) A compound 
B) An element 
C) A molecule 
D) An ion 
A) A compound 
B) An element 
C) A molecule 
D) An ion

Question 7

Why is one side of a single water molecule partially negative while the other side is partially positive?

Accepted Answer

A) Electron pairs are unevenly shared between the oxygen atom and the two hydrogen atoms. 
B) Electron pairs are unevenly shared between the two hydrogen atoms. 
C) Oxygen donates its electrons to hydrogen. 
D) Hydrogen donates its electrons to oxygen. 
A) Electron pairs are unevenly shared between the oxygen atom and the two hydrogen atoms. 
B) Electron pairs are unevenly shared between the two hydrogen atoms. 
C) Oxygen donates its electrons to hydrogen. 
D) Hydrogen donates its electrons to oxygen.

Question 8

While the maximum number of electrons required to fill the outermost shell of an atom varies depending on the size of the atom, almost all of the smaller atoms (atomic numbers 2-20) are considered stable, and thus nonreactive, when they contain ________ electron(s) in the outermost shell.

Accepted Answer

A) 1 
B) 2 
C) 8 
D) 16 
A) 1 
B) 2 
C) 8 
D) 16

Question 9

Which of the following accurately describes the pH scale?

Accepted Answer

A) The pH scale runs from 0 (most basic)to 14 (most acidic), with 7 as a neutral. 
B) The pH scale runs from 0 (most acidic)to 14 (most basic), with 7 as a neutral. 
C) The pH scale runs from 0 (neutral)to 14 (most acidic), with 7 as an average acidity level. 
D) The pH scale runs from 0 (most acidic)to 14 (neutral), with 7 as an average acidity level. 
A) The pH scale runs from 0 (most basic)to 14 (most acidic), with 7 as a neutral. 
B) The pH scale runs from 0 (most acidic)to 14 (most basic), with 7 as a neutral. 
C) The pH scale runs from 0 (neutral)to 14 (most acidic), with 7 as an average acidity level. 
D) The pH scale runs from 0 (most acidic)to 14 (neutral), with 7 as an average acidity level.

Question 10

The building of a large organic molecule from small subunits involves multiple ________.

Accepted Answer

A) hydrolysis reactions 
B) osmotic reactions 
C) dehydration synthesis reactions 
D) hydrosynthetic reactions 
A) hydrolysis reactions 
B) osmotic reactions 
C) dehydration synthesis reactions 
D) hydrosynthetic reactions

Question 11

The 2+ in Cu2+ tells us that this atom ________.

Accepted Answer

A) has two more neutrons than protons 
B) has two more protons than electrons 
C) has two more electrons than neutrons 
D) has two more electrons than protons 
A) has two more neutrons than protons 
B) has two more protons than electrons 
C) has two more electrons than neutrons 
D) has two more electrons than protons

Question 12

Which of the following is not made from long chains of glucose?

Accepted Answer

A) Starch 
B) Sucrose 
C) Glycogen 
D) Cellulose 
A) Starch 
B) Sucrose 
C) Glycogen 
D) Cellulose

Question 13

Oil hydrogenation can produce a product, such as vegetable shortening or margarine, that is spreadable at room temperature because of an unusual bond that does not occur naturally.What is the name of this category of lipid?

Accepted Answer

A) Saturated fat 
B) Healthy fat 
C) Trans fat 
D) Cholesterol 
A) Saturated fat 
B) Healthy fat 
C) Trans fat 
D) Cholesterol

Question 14

What is an organic compound?

Accepted Answer

A) A molecule that contains nitrogen bonded to other elements 
B) A molecule that contains carbon bonded to other elements 
C) A molecule that contains both carbon and nitrogen 
D) A molecule that contains a nitrogen skeleton 
A) A molecule that contains nitrogen bonded to other elements 
B) A molecule that contains carbon bonded to other elements 
C) A molecule that contains both carbon and nitrogen 
D) A molecule that contains a nitrogen skeleton

Question 15

Something with a pH of 5 would be ________.

Accepted Answer

A) acidic 
B) basic 
C) neutral 
D) alkaline 
A) acidic 
B) basic 
C) neutral 
D) alkaline

Question 16

What might happen if a protein has a change in one amino acid?

Accepted Answer

A) The amino acid chain folds incorrectly. 
B) The protein can no longer function properly. 
C) The protein has a new shape. 
D) All of these may happen. 
A) The amino acid chain folds incorrectly. 
B) The protein can no longer function properly. 
C) The protein has a new shape. 
D) All of these may happen.

Question 17

________ is the polysaccharide most commonly found in highly fibrous foods such as celery.

Accepted Answer

A) Starch 
B) Cellulose 
C) Glycogen 
D) Chitin 
A) Starch 
B) Cellulose 
C) Glycogen 
D) Chitin

Question 18

What are the monomers of proteins?

Accepted Answer

A) Glucose 
B) Nucleic acids 
C) Fatty acids 
D) Amino acids 
A) Glucose 
B) Nucleic acids 
C) Fatty acids 
D) Amino acids

Question 19

Which of the three gasses is the easiest to break apart: nitrogen gas (N2), oxygen gas (O2), or hydrogen gas (H2)? Which is the most difficult to break apart? What accounts for the differences?

Accepted Answer

Hydrogen gas, with a single covalent bon

Question 20

An old home remedy for anemia was to drink from a jug of water into which was added a handful of iron nails.Why might this have been effective at treating certain forms of anemia?

Accepted Answer

Iron is an essential nutrient, and the w

Which of the following properties of water molecules has important implications to life?

To a large extent, a protein's function is dependent upon its shape.What determines a protein's shape?

Which number represents the atomic weight of oxygen?

Penicillin is a competitive inhibitor produced by a fungus in order to kill invading bacteria.It does this by mimicking the substrate required by the bacterium to build and repair its cell wall.Describe how mimicking the substrate would result in the death of the bacterium.

Enzymes are a type of ________.

The chemical name for table salt is sodium chloride, or simply NaCl.What type of chemical is NaCl?

Why is one side of a single water molecule partially negative while the other side is partially positive?

While the maximum number of electrons required to fill the outermost shell of an atom varies depending on the size of the atom, almost all of the smaller atoms (atomic numbers 2-20) are considered stable, and thus nonreactive, when they contain ________ electron(s) in the outermost shell.

Which of the following accurately describes the pH scale?

The building of a large organic molecule from small subunits involves multiple ________.

The 2+ in Cu²⁺ tells us that this atom ________.

Which of the following is not made from long chains of glucose?

Oil hydrogenation can produce a product, such as vegetable shortening or margarine, that is spreadable at room temperature because of an unusual bond that does not occur naturally.What is the name of this category of lipid?

What is an organic compound?

Something with a pH of 5 would be ________.

What might happen if a protein has a change in one amino acid?

________ is the polysaccharide most commonly found in highly fibrous foods such as celery.

What are the monomers of proteins?

Which of the three gasses is the easiest to break apart: nitrogen gas (N₂), oxygen gas (O₂), or hydrogen gas (H₂)? Which is the most difficult to break apart? What accounts for the differences?

An old home remedy for anemia was to drink from a jug of water into which was added a handful of iron nails.Why might this have been effective at treating certain forms of anemia?

An Introduction to the Science of Life

The Cell: The Fundamental Unit of Life

Energy and Life

Chromosomes and Inheritance

DNA: The Molecule of Life

Darwinian Evolution

Biodiversity 1: Microscopic Organisms

Biodiversity 2: Fungi and Plants

Biodiversity 3: Animals

Human Body Systems

Ecology

Biology The Core: Appendix

Filters

Exam 2: The Chemistry of Life

Which of the following properties of water molecules has important implications to life?

To a large extent, a protein's function is dependent upon its shape.What determines a protein's shape?

Which number represents the atomic weight of oxygen?

Penicillin is a competitive inhibitor produced by a fungus in order to kill invading bacteria.It does this by mimicking the substrate required by the bacterium to build and repair its cell wall.Describe how mimicking the substrate would result in the death of the bacterium.

Enzymes are a type of ________.

The chemical name for table salt is sodium chloride, or simply NaCl.What type of chemical is NaCl?

Why is one side of a single water molecule partially negative while the other side is partially positive?

While the maximum number of electrons required to fill the outermost shell of an atom varies depending on the size of the atom, almost all of the smaller atoms (atomic numbers 2-20) are considered stable, and thus nonreactive, when they contain ________ electron(s) in the outermost shell.

Which of the following accurately describes the pH scale?

The building of a large organic molecule from small subunits involves multiple ________.

The 2+ in Cu2+ tells us that this atom ________.

Which of the following is not made from long chains of glucose?

Oil hydrogenation can produce a product, such as vegetable shortening or margarine, that is spreadable at room temperature because of an unusual bond that does not occur naturally.What is the name of this category of lipid?

What is an organic compound?

Something with a pH of 5 would be ________.

What might happen if a protein has a change in one amino acid?

________ is the polysaccharide most commonly found in highly fibrous foods such as celery.

What are the monomers of proteins?

Which of the three gasses is the easiest to break apart: nitrogen gas (N2), oxygen gas (O2), or hydrogen gas (H2)? Which is the most difficult to break apart? What accounts for the differences?

An old home remedy for anemia was to drink from a jug of water into which was added a handful of iron nails.Why might this have been effective at treating certain forms of anemia?

An Introduction to the Science of Life

The Cell: The Fundamental Unit of Life

Energy and Life

Chromosomes and Inheritance

DNA: The Molecule of Life

Darwinian Evolution

Biodiversity 1: Microscopic Organisms

Biodiversity 2: Fungi and Plants

Biodiversity 3: Animals

Human Body Systems

Ecology

Biology The Core: Appendix

Filters

The 2+ in Cu²⁺ tells us that this atom ________.

Which of the three gasses is the easiest to break apart: nitrogen gas (N₂), oxygen gas (O₂), or hydrogen gas (H₂)? Which is the most difficult to break apart? What accounts for the differences?