Question 1

Individual water molecules are held to one another by relatively weak ________ bonds.

Accepted Answer

A) covalent 
B) hydrogen 
C) ionic 
D) nonpolar 
A) covalent 
B) hydrogen 
C) ionic 
D) nonpolar

Question 2

Which of the following molecules is solid at room temperature?

Accepted Answer

A) Saturated fats 
B) Unsaturated fats 
C) Cholesterol 
D) Both saturated and unsaturated fats 
A) Saturated fats 
B) Unsaturated fats 
C) Cholesterol 
D) Both saturated and unsaturated fats

Question 3

A polypeptide is ________.

Accepted Answer

A) a long chain of amino acids 
B) a long chain of glucose 
C) a long chain of fatty acids 
D) a long chain of nucleic acids 
A) a long chain of amino acids 
B) a long chain of glucose 
C) a long chain of fatty acids 
D) a long chain of nucleic acids

Question 4

What are inhibitors?

Accepted Answer

A) Molecules that allow reactions to proceed more quickly 
B) Molecules that prevent enzymes from working 
C) Molecules that inhibit protein synthesis 
D) Molecules that bind to an enzyme to help its reaction 
A) Molecules that allow reactions to proceed more quickly 
B) Molecules that prevent enzymes from working 
C) Molecules that inhibit protein synthesis 
D) Molecules that bind to an enzyme to help its reaction

Question 5

What is a trace element?

Accepted Answer

A) An element that is very common in nature 
B) An element that is evenly distributed on the planet 
C) An element that is required in miniscule amounts for life 
D) An element that is used to identify the location of other elements 
A) An element that is very common in nature 
B) An element that is evenly distributed on the planet 
C) An element that is required in miniscule amounts for life 
D) An element that is used to identify the location of other elements

Question 6

In an atom, the number of neutrons determines most specifically the ________.

Accepted Answer

A) chemical element 
B) isotope 
C) ion state 
D) chemical properties 
A) chemical element 
B) isotope 
C) ion state 
D) chemical properties

Question 7

Select the most complete explanation of what the pH scale measures.

Accepted Answer

A) The acidity of a solvent 
B) The alkalinity of a solvent 
C) The concentration of hydrogen ions in a solution 
D) The concentration of buffers in a solution 
A) The acidity of a solvent 
B) The alkalinity of a solvent 
C) The concentration of hydrogen ions in a solution 
D) The concentration of buffers in a solution

Question 8

What kind of bond joins amino acids together to form a protein?

Accepted Answer

A) Peptide bond 
B) Hydrogen bond 
C) Polar bond 
D) Protein bond 
A) Peptide bond 
B) Hydrogen bond 
C) Polar bond 
D) Protein bond

Question 9

List the different types of macromolecules of life, and for each one, list one of its functions and its main monomer.

Accepted Answer

There are 4 different types of macromole

Question 10

Which of the following statements regarding chemical reactions is false?

Accepted Answer

A) The products of a chemical reaction always have the same mass as the reactants. 
B) During a chemical reaction, molecules are rearranged. 
C) During a chemical reaction, atoms of one element can be converted into a different element. 
D) There are chemical reactions close to you right now. 
A) The products of a chemical reaction always have the same mass as the reactants. 
B) During a chemical reaction, molecules are rearranged. 
C) During a chemical reaction, atoms of one element can be converted into a different element. 
D) There are chemical reactions close to you right now.

Question 11

During a chemical reaction, atoms are ________.

Accepted Answer

A) destroyed 
B) created 
C) rearranged 
D) destroyed and created 
A) destroyed 
B) created 
C) rearranged 
D) destroyed and created

Question 12

What is the basic structure of a triglyceride?

Accepted Answer

A) A glycerol head and three fatty acid tails 
B) A linear chain of fatty acids 
C) A branched chain of fatty acids 
D) A chain of fatty acid tails 
A) A glycerol head and three fatty acid tails 
B) A linear chain of fatty acids 
C) A branched chain of fatty acids 
D) A chain of fatty acid tails

Question 13

How do buffers minimize change in the pH of biological systems?

Accepted Answer

A) By absorbing H+ ions when there is an excess 
B) By donating H+ ions when there is a shortage 
C) Both of these 
D) Neither of these 
A) By absorbing H+ ions when there is an excess 
B) By donating H+ ions when there is a shortage 
C) Both of these 
D) Neither of these

Question 14

Which is not one of the four atoms that make up the bulk of living organisms?

Accepted Answer

A) Oxygen 
B) Nitrogen 
C) Calcium 
D) Carbon 
A) Oxygen 
B) Nitrogen 
C) Calcium 
D) Carbon

Question 15

What are the four classes of large organic molecules important to life on Earth?

Accepted Answer

A) Carbohydrates, lipids, proteins, and enzymes 
B) Carbohydrates, lipids, proteins, and sugars 
C) Carbohydrates, proteins, nucleic acids, and sugars 
D) Carbohydrates, proteins, lipids, and nucleic acids 
A) Carbohydrates, lipids, proteins, and enzymes 
B) Carbohydrates, lipids, proteins, and sugars 
C) Carbohydrates, proteins, nucleic acids, and sugars 
D) Carbohydrates, proteins, lipids, and nucleic acids

Question 16

Which of the following large organic molecules include table sugar?

Accepted Answer

A) Carbohydrates 
B) Lipids 
C) Proteins 
D) Nucleic acids 
A) Carbohydrates 
B) Lipids 
C) Proteins 
D) Nucleic acids

Question 17

What is the most common element in your body?

Accepted Answer

A) Oxygen 
B) Water 
C) Carbon 
D) Sugar 
A) Oxygen 
B) Water 
C) Carbon 
D) Sugar

Question 18

How many neutrons are in a typical oxygen atom?

Accepted Answer

A) 8 
B) 12 
C) 18 
D) Not enough information given 
A) 8 
B) 12 
C) 18 
D) Not enough information given

Question 19

Why does sweating cool your skin on a hot, dry day but make you feel warmer on a hot, humid day?

Accepted Answer

Evaporating sweat cools the skin as the

Question 20

Which of the following bonds is the weakest?

Accepted Answer

A) The ionic bond 
B) The covalent bond 
C) The hydrogen bond 
D) All three bonds are roughly equal in strength 
A) The ionic bond 
B) The covalent bond 
C) The hydrogen bond 
D) All three bonds are roughly equal in strength

Individual water molecules are held to one another by relatively weak ________ bonds.

Which of the following molecules is solid at room temperature?

A polypeptide is ________.

What are inhibitors?

What is a trace element?

In an atom, the number of neutrons determines most specifically the ________.

Select the most complete explanation of what the pH scale measures.

What kind of bond joins amino acids together to form a protein?

List the different types of macromolecules of life, and for each one, list one of its functions and its main monomer.

Which of the following statements regarding chemical reactions is false?

During a chemical reaction, atoms are ________.

What is the basic structure of a triglyceride?

How do buffers minimize change in the pH of biological systems?

Which is not one of the four atoms that make up the bulk of living organisms?

What are the four classes of large organic molecules important to life on Earth?

Which of the following large organic molecules include table sugar?

What is the most common element in your body?

How many neutrons are in a typical oxygen atom?

Why does sweating cool your skin on a hot, dry day but make you feel warmer on a hot, humid day?

Which of the following bonds is the weakest?

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

Individual water molecules are held to one another by relatively weak ________ bonds.

Which of the following molecules is solid at room temperature?

A polypeptide is ________.

What are inhibitors?

What is a trace element?

In an atom, the number of neutrons determines most specifically the ________.

Select the most complete explanation of what the pH scale measures.

What kind of bond joins amino acids together to form a protein?

List the different types of macromolecules of life, and for each one, list one of its functions and its main monomer.

Which of the following statements regarding chemical reactions is false?

During a chemical reaction, atoms are ________.

What is the basic structure of a triglyceride?

How do buffers minimize change in the pH of biological systems?

Which is not one of the four atoms that make up the bulk of living organisms?

What are the four classes of large organic molecules important to life on Earth?

Which of the following large organic molecules include table sugar?

What is the most common element in your body?

How many neutrons are in a typical oxygen atom?

Why does sweating cool your skin on a hot, dry day but make you feel warmer on a hot, humid day?

Which of the following bonds is the weakest?

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